Fix screensaver idle timeout overflow by using 1s poll intervals with deadline tracking instead of direct millisecond conversion

added a landing page for the help command

Cargo.lock

@@ -224,6 +224,17 @@ version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
 
+[[package]]
+name = "fnmatch-regex"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0f319c7da34eac5f0b8c7220a4afb2e1ddde0c24ae87c7435a8e36dcd62a43a3"
+dependencies = [
+ "anyhow",
+ "itertools",
+ "regex",
+]
+
 [[package]]
 name = "foldhash"
 version = "0.1.5"
@@ -562,12 +573,13 @@ dependencies = [
 
 [[package]]
 name = "shed"
-version = "0.5.0"
+version = "0.6.2"
 dependencies = [
  "ariadne",
  "bitflags",
  "clap",
  "env_logger",
+ "fnmatch-regex",
  "glob",
  "itertools",
  "log",
@@ -577,6 +589,7 @@ dependencies = [
  "regex",
  "scopeguard",
  "serde_json",
+ "smallvec",
  "tempfile",
  "unicode-segmentation",
  "unicode-width",
@@ -584,6 +597,12 @@ dependencies = [
  "yansi",
 ]
 
+[[package]]
+name = "smallvec"
+version = "1.15.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "67b1b7a3b5fe4f1376887184045fcf45c69e92af734b7aaddc05fb777b6fbd03"
+
 [[package]]
 name = "strsim"
 version = "0.11.1"

Cargo.toml

@@ -2,7 +2,7 @@
 name = "shed"
 description = "A linux shell written in rust"
 publish = false
-version = "0.5.0"
+version = "0.6.2"
 
 edition = "2024"
 
@@ -14,6 +14,7 @@ ariadne = "0.6.0"
 bitflags = "2.8.0"
 clap = { version = "4.5.38", features = ["derive"] }
 env_logger = "0.11.9"
+fnmatch-regex = "0.3.0"
 glob = "0.3.2"
 itertools = "0.14.0"
 log = "0.4.29"
@@ -35,6 +36,8 @@ rand = "0.10.0"
 regex = "1.11.1"
 scopeguard = "1.2.0"
 serde_json = "1.0.149"
+smallvec = { version = "1.15.1", features = ["write"] }
+tempfile = "3.24.0"
 unicode-segmentation = "1.12.0"
 unicode-width = "0.2.0"
 vte = "0.15"

README.md

@@ -1,6 +1,8 @@
 # shed
 
-A Linux shell written in Rust. The name is a nod to the original Unix utilities `sh` and `ed`. It's a shell with a heavy emphasis on smooth line editing.
+A Linux shell written in Rust. The name is a nod to the original Unix utilities `sh` and `ed`. It's a shell with a heavy emphasis on smooth line editing and general interactive UX improvements over existing shells. 
+
+<sub>btw if you don't use `vim` this probably isn't your shell</sub>
 
 <img width="506" height="407" alt="shed" src="https://github.com/user-attachments/assets/3945f663-a361-4418-bf20-0c4eaa2a36d2" />
 
@@ -8,7 +10,7 @@ A Linux shell written in Rust. The name is a nod to the original Unix utilities
 
 ### Line Editor
 
-`shed` includes a built-in `vim` emulator as its line editor, written from scratch. It aims to provide a more precise vim-like editing experience at the shell prompt.
+`shed` includes a built-in `vim` emulator as its line editor, written from scratch. It aims to provide a more precise vim-like editing experience at the shell prompt than conventional `vi` mode implementations.
 
 - **Normal mode** - motions (`w`, `b`, `e`, `f`, `t`, `%`, `0`, `$`, etc.), verbs (`d`, `c`, `y`, `p`, `r`, `x`, `~`, etc.), text objects (`iw`, `aw`, `i"`, `a{`, `is`, etc.), registers, `.` repeat, `;`/`,` repeat, and counts
 - **Insert mode** - insert, append, replace, with Ctrl+W word deletion and undo/redo
@@ -40,6 +42,8 @@ gitbranch() { git branch --show-current 2>/dev/null; }
 export PS1='\u@\h \W \@gitbranch \$ '
 ```
 
+If `shed` receives `SIGUSR1` while in interactive mode, it will refresh and redraw the prompt. This can be used to create asynchronous, dynamic prompt content.
+
 Additionally, `echo` now has a `-p` flag that expands prompt escape sequences, similar to how the `-e` flag expands conventional escape sequences.
 
 ---

doc/arith.txt

@@ -0,0 +1,76 @@
+*arith* *arithmetic* *arithmetic-expansion*
+
+#ARITHMETIC EXPANSION#
+
+Arithmetic expansion evaluates a mathematical expression and substitutes
+the result. The expression is subject to parameter expansion and command
+substitution before evaluation.
+
+  `$((expression))`
+
+      Example:
+        `echo $((2 + 3))`       # prints: 5
+        `x=$((width * height))`
+
+==============================================================================
+1. Operators                                   *arith-operators*
+
+  The following operators are supported, listed from highest to lowest
+  precedence:
+
+  `( )`                                        *arith-parens*
+
+      Grouping. Override default precedence.
+
+      Example:
+        `echo $(( (2+3) * 4 ))`  # prints: 20
+
+  `*` `/` `%`                                  *arith-muldivmod*
+
+      Multiplication, division, and modulo (remainder).
+
+      Example:
+        `echo $((10 / 3))`       # prints: 3
+        `echo $((10 % 3))`       # prints: 1
+
+  `+` `-`                                      *arith-addsub*
+
+      Addition and subtraction.
+
+      Example:
+        `echo $((10 - 3 + 1))`   # prints: 8
+
+==============================================================================
+2. Variables in Expressions                    *arith-variables*
+
+  Variables can be referenced by name inside arithmetic expressions.
+  They are expanded and converted to numbers.
+
+      `x=10`
+      `echo $(($x + 5))`        # prints: 15
+      `echo $((x + 5))`         # also works
+
+  If a variable is unset or not a valid number, an error is reported.
+
+==============================================================================
+3. Nesting                                     *arith-nesting*
+
+  Arithmetic expressions can be nested with parentheses to any depth:
+
+      `echo $(( (1+2) * (3+4) ))`  # prints: 21
+
+  Arithmetic expansion can also appear inside other expansions:
+
+      `echo "Total: $((price * qty))"`
+
+==============================================================================
+4. Whitespace                                  *arith-whitespace*
+
+  Whitespace inside `$((...))` is ignored and can be used freely for
+  readability:
+
+      `echo $((2+3))`           # prints: 5
+      `echo $(( 2 + 3 ))`       # same result
+
+==============================================================================
+See also: |param| |redirect| |glob|

doc/autocmd.txt

@@ -0,0 +1,210 @@
+*autocmd* *autocmds* *hooks*
+
+#AUTOCMDS#
+
+Autocmds (automatic commands) execute shell commands in response to
+specific events. They provide a hook system for customizing shell
+behavior without modifying the shell itself.
+
+==============================================================================
+1. Registration                                *autocmd-register*
+
+  `autocmd [OPTIONS] {kind} {command}`
+
+  Register {command} to run whenever the event {kind} fires.
+
+  Options:
+
+    `-p {pattern}`                             *autocmd-pattern*
+
+        Only run this autocmd when {pattern} (a regex) matches the
+        event's context string. The context varies by event type:
+        for |autocmd-pre-cmd| it is the command being executed, for
+        |autocmd-post-change-dir| it is the target directory, etc.
+
+    `-c`                                       *autocmd-clear*
+
+        Clear all autocmds of the specified {kind}. No command is
+        needed.
+
+  Examples:
+
+      `autocmd post-cmd 'echo "exit: $?"'`
+      `autocmd -p '^git' pre-cmd 'echo running git...'`
+      `autocmd -c pre-cmd`
+
+==============================================================================
+2. Event Kinds                                 *autocmd-kinds*
+
+  2.1 Command Execution                        *autocmd-cmd-events*
+
+  `pre-cmd`                                    *autocmd-pre-cmd*
+
+      Fires before a command is executed. The command string is
+      available for pattern matching.
+
+  `post-cmd`                                   *autocmd-post-cmd*
+
+      Fires after a command finishes. The command string is available
+      for pattern matching.
+
+  2.2 Directory Changes                        *autocmd-dir-events*
+
+  `pre-change-dir`                             *autocmd-pre-change-dir*
+
+      Fires before `cd` changes the working directory. The target
+      directory is available for pattern matching.
+
+      Special variables:
+        `$_NEW_DIR`    the directory being changed to
+        `$_OLD_DIR`    the current directory (before the change)
+
+  `post-change-dir`                            *autocmd-post-change-dir*
+
+      Fires after a successful directory change.
+
+      Special variables:
+        `$_NEW_DIR`    the new working directory
+        `$_OLD_DIR`    the previous directory
+
+  2.3 Job Events                               *autocmd-job-events*
+
+  `on-job-finish`                              *autocmd-on-job-finish*
+
+      Fires when a background job completes. The job's command string
+      is available for pattern matching.
+
+  2.4 Prompt Events                            *autocmd-prompt-events*
+
+  `pre-prompt`                                 *autocmd-pre-prompt*
+
+      Fires before the prompt is rendered. Useful for updating prompt
+      state.
+
+  `post-prompt`                                *autocmd-post-prompt*
+
+      Fires after the prompt is rendered.
+
+  2.5 Mode Change Events                       *autocmd-mode-events*
+
+  `pre-mode-change`                            *autocmd-pre-mode-change*
+
+      Fires before the vi editing mode changes. The `$SHED_VI_MODE`
+      variable still holds the old mode.
+
+  `post-mode-change`                           *autocmd-post-mode-change*
+
+      Fires after the vi editing mode changes. `$SHED_VI_MODE` reflects
+      the new mode.
+
+  2.6 History Events                           *autocmd-hist-events*
+
+  `on-history-open`                            *autocmd-on-history-open*
+
+      Fires when the fuzzy history search window opens.
+
+      Special variables:
+        `$_ENTRIES`      array of all history entries
+        `$_NUM_ENTRIES`  count of all entries
+        `$_MATCHES`      array of currently matching entries
+        `$_NUM_MATCHES`  count of matching entries
+        `$_SEARCH_STR`   the current search string
+
+  `on-history-close`                           *autocmd-on-history-close*
+
+      Fires when the history search is dismissed without selecting.
+
+  `on-history-select`                          *autocmd-on-history-select*
+
+      Fires when a history entry is selected. The entry text is
+      available for pattern matching.
+
+      Special variables:
+        `$_HIST_ENTRY`   the selected history entry
+
+  2.7 Completion Events                        *autocmd-comp-events*
+
+  `on-completion-start`                        *autocmd-on-completion-start*
+
+      Fires when the completion menu becomes visible.
+
+      Special variables:
+        `$_MATCHES`      array of completion candidates
+        `$_NUM_MATCHES`  count of candidates
+        `$_SEARCH_STR`   the token being completed
+
+  `on-completion-cancel`                       *autocmd-on-completion-cancel*
+
+      Fires when the completion menu is dismissed without selecting.
+
+  `on-completion-select`                       *autocmd-on-completion-select*
+
+      Fires when a completion candidate is accepted. The candidate
+      is available for pattern matching.
+
+      Special variables:
+        `$_COMP_CANDIDATE`  the selected completion candidate
+
+  2.8 Screensaver Events                       *autocmd-screensaver-events*
+
+  `on-screensaver-exec`                        *autocmd-on-screensaver-exec*
+
+      Fires when the screensaver activates after the idle timeout.
+      The screensaver command (see `shopt prompt.screensaver_cmd`) is
+      available for pattern matching.
+
+  `on-screensaver-return`                      *autocmd-on-screensaver-return*
+
+      Fires when the shell returns from the screensaver command.
+      The screensaver command is available for pattern matching.
+
+  2.9 Exit Event                               *autocmd-exit-event*
+
+  `on-exit`                                    *autocmd-on-exit*
+
+      Fires when the shell is about to exit.
+
+==============================================================================
+3. Behavior                                    *autocmd-behavior*
+
+  - Multiple autocmds can be registered for the same event kind. They
+    execute in registration order.
+
+  - If an autocmd command fails, the error is printed but subsequent
+    autocmds for the same event still run.
+
+  - Autocmds do not affect the shell's exit status (`$?`). The exit
+    status is saved before autocmd execution and restored afterward.
+
+  - Pattern matching uses Rust regex syntax. If an autocmd has no
+    pattern, it always fires for its event kind.
+
+  - Special variables (e.g. `$_NEW_DIR`) are only available within the
+    scope of the autocmd execution. They are not set globally.
+
+==============================================================================
+4. Examples                                    *autocmd-examples*
+
+  Notify on directory change:
+
+      `autocmd post-change-dir 'echo "moved to $_NEW_DIR"'`
+
+  Run a linter only on git commands:
+
+      `autocmd -p '^git commit' post-cmd 'lint-check'`
+
+  Refresh prompt on mode change (for mode indicator):
+
+      `autocmd post-mode-change 'kill -USR1 $$'`
+			(SIGUSR1 can be used to remotely refresh the prompt. See |prompt|)
+
+  Log completed jobs:
+
+      `autocmd on-job-finish 'echo "job done" >> /tmp/jobs.log'`
+
+  Clean up on exit:
+
+      `autocmd on-exit 'rm -f /tmp/my-shell-*.tmp'`
+
+==============================================================================
+See also: |keybinds| |prompt| |ex|

doc/ex.txt

@@ -0,0 +1,109 @@
+*ex* *ex-mode* *ex-commands* *colon-commands*
+
+#EX MODE#
+
+Ex mode provides colon commands for operations that go beyond single-key
+normal mode actions. Enter ex mode by pressing `:` in normal mode.
+
+The command line supports full editing via insert mode, and has its own
+command history navigable with `Up` and `Down`.
+
+==============================================================================
+1. Shell Commands                              *ex-shell*
+
+  `:!{cmd}`                                    *ex-bang*
+
+      Execute {cmd} in the shell. The following special variables are
+      set during execution and can be read or modified:
+
+        `$_BUFFER`    the current editor buffer contents
+        `$_CURSOR`    the cursor position (flat byte index)
+        `$_ANCHOR`    the visual selection anchor position
+
+      If the command modifies these variables, the editor state is
+      updated accordingly. This allows ex commands to programmatically
+      edit the buffer.
+
+      If the command sets `$_KEYS`, the value is fed back into the
+      editor as a key sequence.
+
+      Example:
+        `:!echo "$_BUFFER" | tr a-z A-Z > /tmp/out`
+        `:!_BUFFER=$(echo "$_BUFFER" | sort)`
+
+==============================================================================
+2. File Operations                             *ex-file*
+
+  `:r {file}`                                  *ex-read*
+
+      Read the contents of {file} and insert them into the buffer at
+      the cursor position.
+
+  `:r !{cmd}`                                  *ex-read-cmd*
+
+      Execute {cmd} and insert its output into the buffer.
+
+  `:w {file}`                                  *ex-write*
+
+      Write the buffer contents to {file}. Creates the file if it does
+      not exist, or truncates it if it does.
+
+  `:w >> {file}`                               *ex-write-append*
+
+      Append the buffer contents to {file}.
+
+  `:w !{cmd}`                                  *ex-write-cmd*
+
+      Pipe the buffer contents to {cmd} as stdin.
+
+  `:e {file}`                                  *ex-edit*
+
+      Open {file} in the editor defined by `$EDITOR`. Requires the
+      `EDITOR` environment variable to be set.
+
+      Example:
+        `:e ~/.config/shed/shedrc`
+
+==============================================================================
+3. Buffer Operations                           *ex-buffer*
+
+  `:d`                                         *ex-delete*
+
+      Delete the entire buffer.
+
+  `:y`                                         *ex-yank*
+
+      Yank the entire buffer into the default register.
+
+  `:pu`                                        *ex-put*
+
+      Put (paste) from the default register after the cursor.
+
+==============================================================================
+4. Other Commands                              *ex-other*
+
+  `:q`                                         *ex-quit*
+
+      Quit the editor / exit the shell.
+
+  `:help {topic}`                              *ex-help*
+
+      Display help for {topic}. Runs the `help` builtin.
+
+==============================================================================
+5. Path Expansion                              *ex-paths*
+
+  File paths in ex commands are subject to variable expansion. You can
+  use environment variables in paths:
+
+      `:e $HOME/.config/shed/shedrc`
+      `:w ${TMPDIR}/output.txt`
+
+==============================================================================
+6. Ex Command History                          *ex-history*
+
+  Ex mode maintains its own command history, separate from the main
+  shell history. Navigate with `Up` and `Down` while in ex mode.
+
+==============================================================================
+See also: |keybinds| |autocmd| |prompt|

doc/glob.txt

@@ -0,0 +1,155 @@
+*glob* *globbing* *pathname-expansion* *filename-expansion*
+
+#PATHNAME EXPANSION#
+
+After word splitting, the shell scans each word for the characters `*`,
+`?`, and `[`. If any appear (and are not quoted), the word is treated as a
+pattern and replaced with an alphabetically sorted list of matching file
+names. If no files match, the pattern is left unchanged.
+
+==============================================================================
+1. Wildcards                                   *glob-wildcards*
+
+  `*`                                          *glob-star*
+
+      Matches any string of zero or more characters, except that it does
+      not match a leading `.` (see |glob-dotglob|) or a `/`.
+
+      Example:
+        `echo *.txt`             # all .txt files
+        `ls src/*.rs`            # all .rs files in src/
+
+  `?`                                          *glob-question*
+
+      Matches exactly one character, with the same restrictions as `*`.
+
+      Example:
+        `ls file?.txt`           # file1.txt, fileA.txt, etc.
+
+  `[...]`                                      *glob-bracket*
+
+      Matches any one of the enclosed characters. A range can be specified
+      with a hyphen.
+
+      `[abc]`      matches `a`, `b`, or `c`
+      `[a-z]`      matches any lowercase letter
+      `[0-9]`      matches any digit
+      `[A-Za-z]`   matches any letter
+
+  `[!...]` `[^...]`                            *glob-bracket-negate*
+
+      Matches any character NOT in the set.
+
+      Example:
+        `ls [!.]*.txt`           # .txt files not starting with dot
+        `echo file[^0-9].txt`    # files without a digit
+
+==============================================================================
+2. Hidden Files                                *glob-dotglob*
+
+  By default, patterns do not match files whose names begin with `.`
+  (hidden files). A leading dot must be matched explicitly:
+
+      `echo .*`                  # only hidden files
+      `echo .* *`               # hidden and non-hidden files
+
+  The `dotglob` shell option changes this behavior:
+
+      `shopt core.dotglob true`
+
+  When enabled, `*` and `?` will also match files starting with `.`.
+
+==============================================================================
+3. Brace Expansion                             *brace* *brace-expansion*
+
+  Brace expansion is performed before globbing and generates multiple
+  words from a single pattern. It is not a POSIX feature.
+
+  `{a,b,c}`                                   *brace-list*
+
+      Comma-separated list. Each item becomes a separate word.
+
+      Example:
+        `echo {a,b,c}`           # prints: a b c
+        `echo file.{txt,log}`    # prints: file.txt file.log
+        `mkdir -p src/{bin,lib}`
+
+  `{N..M}`                                    *brace-range*
+
+      Numeric or character range.
+
+      Example:
+        `echo {1..5}`            # prints: 1 2 3 4 5
+        `echo {a..f}`            # prints: a b c d e f
+        `echo {5..1}`            # prints: 5 4 3 2 1
+
+  `{N..M..S}`                                 *brace-range-step*
+
+      Numeric range with step {S}.
+
+      Example:
+        `echo {0..10..2}`        # prints: 0 2 4 6 8 10
+        `echo {1..20..5}`        # prints: 1 6 11 16
+
+  `{01..10}`                                  *brace-range-pad*
+
+      Zero-padded ranges. If either endpoint has leading zeros, all
+      generated values are padded to the same width.
+
+      Example:
+        `echo {01..05}`          # prints: 01 02 03 04 05
+        `echo {001..3}`          # prints: 001 002 003
+
+  Brace expansion can be nested and combined with other expansions:
+
+      `echo {a,b{1..3},c}`      # prints: a b1 b2 b3 c
+
+==============================================================================
+4. Quoting and Escaping                        *glob-quoting*
+
+  Glob characters lose their special meaning when quoted:
+
+      `echo "*"`                 # prints literal *
+      `echo '*.txt'`            # prints literal *.txt
+      `echo \*`                 # prints literal *
+
+  This is important when passing patterns to commands like `find` or
+  `grep` where you want the command (not the shell) to interpret the
+  pattern.
+
+==============================================================================
+5. Tilde Expansion                             *tilde* *tilde-expansion*
+
+  Tilde expansion is performed before pathname expansion.
+
+  `~`                                          *tilde-home*
+
+      Expands to the value of `$HOME`.
+
+  `~/path`                                     *tilde-home-path*
+
+      Expands `~` to `$HOME`, then appends the path.
+
+      Example:
+        `cd ~/projects`
+        `ls ~/.config`
+
+  `~user`                                      *tilde-user*
+
+      Expands to the home directory of {user}.
+
+      Example:
+        `ls ~root`               # /root
+        `cat ~nobody/.profile`
+
+  `~uid`                                       *tilde-uid*
+
+      Expands to the home directory of the user with numeric uid {uid}.
+      This is a shed-specific extension.
+
+      Example:
+        `echo ~0`                # /root (uid 0)
+        `echo ~1000`             # first normal user's home
+
+==============================================================================
+See also: |param| |redirect| |arith|

doc/help.txt

@@ -0,0 +1,44 @@
+*help*
+
+#SHED HELP#
+
+Shed is an experimental UNIX command interpreter (shell) usable as both an interactive login shell and as a shell script command preprocessor. Shed combines the functionality of `bash` with the UX and customizability of `vim`. Shed seeks to improve the interactive shell experience by providing:
+* Programmable, dynamic prompts
+* A hackable line editor similar to `zsh`'s `zle`
+* Custom tab completion
+* An event hook system
+* Fuzzy history search/tab completion
+* And many more features
+
+==============================================================================
+1. Available Topics                            *help-topics*
+
+  `help arith`        Arithmetic expansion: `$(( ))` syntax       |arith|
+  `help autocmd`      Autocmd hooks for shell events               |autocmd|
+  `help ex`           Ex mode (colon) commands                     |ex|
+  `help glob`         Pathname expansion and wildcards             |glob|
+  `help keybinds`     Vi mode keys, motions, text objects          |keybinds|
+  `help param`        Parameter expansion: `${}` operators         |param|
+  `help prompt`       Prompt configuration, PS1, PSR, echo -p      |prompt|
+  `help redirect`     Redirection, pipes, heredocs                 |redirect|
+
+==============================================================================
+2. Navigating Help                             *help-nav*
+
+  `help {topic}`      Open a help page by name. Prefix matches work,
+                      so `help key` opens |keybinds|.
+
+  `help {tag}`        Jump directly to a tagged section. Tags are the
+                      words marked with `*asterisks*` in the help files.
+
+                      Examples:
+                        `help text-objects`     jumps to |text-objects|
+                        `help prompt-escapes`   jumps to |prompt-escapes|
+                        `help heredoc`          jumps to |heredoc|
+
+  Cross-references like |prompt| are clickable tags. Search for them
+  with `help` followed by the reference name.
+
+  Inside the pager, use `/` to search and `q` to quit.
+
+==============================================================================

doc/keybinds.txt

@@ -0,0 +1,461 @@
+*keybinds* *keys* *vi-mode* *keybindings*
+
+#VI MODE KEYBINDINGS#
+
+The line editor uses a vi-style modal editing system with six modes:
+Normal, Insert, Visual, Replace, Ex (command), and Verbatim. The default
+mode on startup is Insert.
+
+==============================================================================
+1. Normal Mode                                 *normal-mode*
+
+  Normal mode is for navigating and manipulating text. Press `Esc` from
+  any other mode to return here.
+
+  1.1 Movement                                 *normal-movement*
+
+  `h` `l`                                      *key-h* *key-l*
+
+      Move left / right by one character.
+
+  `j` `k`                                      *key-j* *key-k*
+
+      Move down / up by one line.
+
+  `w` `W`                                      *key-w* *key-W*
+
+      Move to the start of the next word. `w` stops at punctuation
+      boundaries, `W` only stops at whitespace.
+
+  `b` `B`                                      *key-b* *key-B*
+
+      Move to the start of the previous word.
+
+  `e` `E`                                      *key-e* *key-E*
+
+      Move to the end of the next word.
+
+  `ge` `gE`                                    *key-ge* *key-gE*
+
+      Move to the end of the previous word.
+
+  `0`                                          *key-0*
+
+      Move to the start of the line.
+
+  `^`                                          *key-caret*
+
+      Move to the first non-whitespace character on the line.
+
+  `$`                                          *key-dollar*
+
+      Move to the end of the line.
+
+  `g_`                                         *key-g_*
+
+      Move to the last non-whitespace character on the line.
+
+  `gg`                                         *key-gg*
+
+      Move to the first line of the buffer.
+
+  `G`                                          *key-G*
+
+      Move to the last line of the buffer.
+
+  `|`                                          *key-bar*
+
+      Move to a specific column. `10|` moves to column 10.
+
+  `%`                                          *key-percent*
+
+      Jump to the matching bracket: `()`, `[]`, `{}`.
+
+  `](` `[(`                                   *key-paren-nav*
+
+      Jump to the next / previous unmatched parenthesis.
+
+  `]}` `[{`                                   *key-brace-nav*
+
+      Jump to the next / previous unmatched brace.
+
+  1.2 Character Search                         *char-search*
+
+  `f{char}`                                    *key-f*
+
+      Move forward to the next occurrence of {char} on the current line.
+
+  `F{char}`                                    *key-F*
+
+      Move backward to the previous occurrence of {char}.
+
+  `t{char}`                                    *key-t*
+
+      Move forward to just before {char}.
+
+  `T{char}`                                    *key-T*
+
+      Move backward to just after {char}.
+
+  `;`                                          *key-semicolon*
+
+      Repeat the last `f`, `F`, `t`, or `T` in the same direction.
+
+  `,`                                          *key-comma*
+
+      Repeat the last `f`, `F`, `t`, or `T` in the reverse direction.
+
+  1.3 Scrolling                                *scrolling*
+
+  `Ctrl+D`                                     *key-ctrl-d*
+
+      In normal mode, scroll down half a screen. See |viewport|.
+			In insert mode, `Ctrl+D` clears the buffer if there is any content, and exits the shell if there is not.
+
+  `Ctrl+U`                                     *key-ctrl-u*
+
+      Scroll up half a screen.
+
+  `Ctrl+G`                                     *key-ctrl-g*
+
+      Print current cursor position (line, column, total lines).
+
+  1.4 Operators                                *operators*
+
+  Operators take a {motion} or |text-object| to define the range they
+  act on. Double an operator to act on the whole line (e.g. `dd`, `>>`,
+  `==`).
+
+  `d{motion}`                                  *key-d*
+
+      Delete the text covered by {motion}.
+
+      `dd`      delete the whole line
+      `D`       delete to end of line (same as `d$`)
+      `x`       delete character under cursor (same as `dl`)
+      `X`       delete character before cursor (same as `dh`)
+
+  `c{motion}`                                  *key-c*
+
+      Delete the text covered by {motion} and enter insert mode.
+
+      `cc`      change the whole line
+      `C`       change to end of line (same as `c$`)
+      `s`       change the character under cursor (same as `cl`)
+      `S`       change the whole line (same as `cc`)
+
+  `y{motion}`                                  *key-y*
+
+      Yank (copy) the text covered by {motion} into a register.
+
+      `yy`      yank the whole line
+      `Y`       yank the whole line
+
+  `>{motion}`                                  *key-indent*
+
+      Indent the lines covered by {motion}.
+
+      `>>`      indent the current line
+
+  `<{motion}`                                  *key-dedent*
+
+      Dedent the lines covered by {motion}.
+
+      `<<`      dedent the current line
+
+  `={motion}`                                  *key-equalize*
+
+      Auto-indent the lines covered by {motion}. Uses the minimum
+      nesting depth of each line's start and end to determine the
+      correct indentation level.
+
+      `==`      equalize the current line
+
+  `g~{motion}`                                 *key-toggle-case*
+
+      Toggle the case of the text covered by {motion}.
+
+  `gu{motion}`                                 *key-gu*
+
+      Convert the text covered by {motion} to lowercase.
+
+  `gU{motion}`                                 *key-gU*
+
+      Convert the text covered by {motion} to uppercase.
+
+  1.5 Single-Key Actions                       *normal-actions*
+
+  `p`                                          *key-p*
+
+      Paste from the register after the cursor.
+
+  `P`                                          *key-P*
+
+      Paste from the register before the cursor.
+
+  `r{char}`                                    *key-r*
+
+      Replace the character under the cursor with {char}. With a count,
+      replaces that many characters.
+
+  `~`                                          *key-tilde*
+
+      Toggle the case of the character under the cursor and advance.
+      Accepts a count.
+
+  `J`                                          *key-J*
+
+      Join the current line with the next line.
+
+  `u`                                          *key-u*
+
+      Undo the last change.
+
+  `Ctrl+R`                                     *key-ctrl-r*
+
+      Redo the last undone change.
+
+  `.`                                          *key-dot*
+
+      Repeat the last editing command.
+
+  `Ctrl+A`                                     *key-ctrl-a*
+
+      Increment the number under the cursor. Recognizes decimal,
+      hexadecimal (`0x`), binary (`0b`), and octal (`0o`) formats.
+      Preserves leading zeros and prefix.
+
+  `Ctrl+X`                                     *key-ctrl-x*
+
+      Decrement the number under the cursor.
+
+  1.6 Entering Other Modes                     *mode-entry*
+
+  `i`       insert before cursor               *key-i*
+  `a`       insert after cursor                 *key-a*
+  `I`       insert at first non-whitespace      *key-I*
+  `A`       insert at end of line               *key-A*
+  `o`       open a new line below               *key-o*
+  `O`       open a new line above               *key-O*
+  `R`       enter replace mode                  *key-R*
+  `v`       enter visual mode (character-wise)  *key-v*
+  `V`       enter visual mode (line-wise)       *key-V-visual*
+  `gv`      reselect last visual region         *key-gv*
+  `:`       enter ex mode                       *key-colon*
+
+  1.7 Registers                                *registers*
+
+  `"{reg}`                                     *key-register*
+
+      Use register {reg} for the next delete, yank, or put. Registers
+      `a`-`z` store text; uppercase `A`-`Z` appends to the corresponding
+      lowercase register.
+
+==============================================================================
+2. Insert Mode                                 *insert-mode*
+
+  Insert mode is for typing text. Characters are inserted at the cursor.
+
+  `Esc`           return to normal mode
+  `Backspace`     delete character before cursor
+  `Ctrl+H`        same as Backspace
+  `Ctrl+W`        delete word before cursor
+  `Delete`        delete character under cursor
+  `Tab`           trigger completion (see |completion|)
+  `Shift+Tab`     trigger completion (reverse direction)
+  `Ctrl+R`        open history search (see |history-search|)
+  `Ctrl+V`        enter verbatim mode (insert literal key sequence)
+  `Enter`         submit line or insert newline if input is incomplete
+
+  Arrow keys, Home, and End work as expected for navigation.
+
+==============================================================================
+3. Visual Mode                                 *visual-mode*
+
+  Visual mode selects a region of text. Enter with `v` (character-wise)
+  or `V` (line-wise) from normal mode.
+
+  All normal-mode motions work to extend the selection. Operators act
+  on the selected region without needing a motion:
+
+  `d` `x`     delete selection
+  `c` `s` `S` change selection (delete and enter insert mode)
+  `y`         yank selection
+  `p` `P`     paste, replacing selection
+  `>` `<`     indent / dedent selection
+  `=`         equalize selection
+  `~`         toggle case of selection
+  `u`         lowercase selection
+  `U`         uppercase selection
+  `r{char}`   replace every character in selection with {char}
+  `J`         join selected lines
+  `o` `O`     swap cursor and selection anchor
+
+  Press `Esc` to return to normal mode without acting.
+
+==============================================================================
+4. Replace Mode                                *replace-mode*
+
+  Replace mode overwrites existing characters as you type. Enter with
+  `R` from normal mode.
+
+  `Esc`           return to normal mode
+  `Backspace`     undo the last replacement
+
+  All other keys replace the character under the cursor and advance.
+
+==============================================================================
+5. Ex Mode                                     *ex-mode-keys*
+
+  Ex mode accepts colon commands. Enter with `:` from normal mode.
+  See |ex| for available commands.
+
+  `Enter`         execute the command
+  `Esc`           cancel and return to normal mode
+  `Ctrl+C`        clear the command line
+  `Up` `Down`     navigate ex command history
+
+==============================================================================
+6. Text Objects                                *text-objects*
+
+  Text objects define a range of text based on structure. They are used
+  with operators: `d`, `c`, `y`, etc. Each has an "inner" (`i`) and
+  "around" (`a`) variant.
+
+  `iw` `aw`                                    *obj-word*
+
+      Word (punctuation-delimited). `aw` includes trailing whitespace.
+
+  `iW` `aW`                                    *obj-WORD*
+
+      WORD (whitespace-delimited). `aW` includes trailing whitespace.
+
+  `i"` `a"`                                    *obj-dquote*
+
+      Double-quoted string.
+
+  `i'` `a'`                                    *obj-squote*
+
+      Single-quoted string.
+
+  `` i` `` `` a` ``                            *obj-backtick*
+
+      Backtick-quoted string.
+
+  `i)` `a)` `ib` `ab`                         *obj-paren*
+
+      Parenthesized block.
+
+  `i]` `a]`                                    *obj-bracket*
+
+      Square-bracketed block.
+
+  `i}` `a}` `iB` `aB`                         *obj-brace*
+
+      Brace-delimited block.
+
+  `i<` `a<`                                    *obj-angle*
+
+      Angle-bracketed block.
+
+  `it` `at`                                    *obj-tag*
+
+      XML/HTML tag block.
+
+  `is` `as`                                    *obj-sentence*
+
+      Sentence.
+
+  `ip` `ap`                                    *obj-paragraph*
+
+      Paragraph (separated by blank lines).
+
+==============================================================================
+7. Counts                                      *counts*
+
+  Most motions, operators, and actions accept a numeric count prefix:
+
+      `3j`        move down 3 lines
+      `2dw`       delete 2 words
+      `5>>`       indent 5 lines
+      `10l`       move 10 characters right
+
+  When both the operator and the motion have counts, they are
+  multiplied: `2d3w` deletes 6 words.
+
+==============================================================================
+8. Viewport                                    *viewport*
+
+  When the buffer is taller than the terminal, the editor displays a
+  scrolling viewport. The viewport follows the cursor and respects the
+  `line.scroll_offset` shopt (minimum lines visible above/below the cursor).
+
+  `Ctrl+D`    scroll down half a screen
+  `Ctrl+U`    scroll up half a screen
+  `Ctrl+G`    display current position in the buffer
+
+  Line numbers in the left margin reflect actual buffer positions, not
+  viewport-relative indices.
+
+==============================================================================
+9. User-Defined Keymaps                        *keymaps* *keymap*
+
+  Custom key bindings are created with the `keymap` command:
+
+    `keymap [flags] {keys} {action}`
+
+  Flags select the mode(s) the binding applies to:
+
+    `-n`      normal mode
+    `-i`      insert mode
+    `-v`      visual mode
+    `-x`      ex mode
+    `-o`      operator-pending mode
+    `-r`      replace mode
+
+  Keys and actions use angle-bracket notation for special keys:
+
+    `<CR>`    Enter             `<Esc>`     Escape
+    `<Tab>`   Tab               `<BS>`      Backspace
+    `<Del>`   Delete            `<Space>`   Space
+    `<Up>` `<Down>` `<Left>` `<Right>`      Arrow keys
+    `<Home>` `<End>`            Home / End
+    `<F1>` - `<F12>`            Function keys
+    `<CMD>`   Enter ex mode
+    `<Leader>`                  Leader key (set via `shopt prompt.leader`)
+
+  Modifier prefixes:
+
+    `C-`      Control           `A-` `M-`   Alt / Meta
+    `S-`      Shift
+
+  Examples:
+
+    `keymap -n <Leader>w ':w<CR>'`     Leader+w writes to file
+    `keymap -i jk '<Esc>'`             jk exits insert mode
+    `keymap -n <C-n> ':!mycmd<CR>'`    Ctrl+n runs a shell command
+
+  To remove a binding:
+
+    `keymap --remove {keys}`
+
+==============================================================================
+10. Completion                                 *completion*
+
+  `Tab`       start or cycle through completion candidates (forward)
+  `Shift+Tab` cycle backward
+
+  When the completion menu is visible, `Tab` and arrow keys navigate
+  candidates. `Enter` accepts the selected candidate. `Esc` dismisses
+  the menu.
+
+==============================================================================
+11. History Search                             *history-search*
+
+  `Ctrl+R`    open fuzzy history search (from insert or ex mode)
+
+  Type to filter history entries. `Enter` accepts the selected entry.
+  `Esc` dismisses the search.
+
+==============================================================================
+See also: |ex| |autocmd| |prompt|

doc/param.txt

@@ -0,0 +1,197 @@
+*param* *parameter-expansion* *param-expansion*
+
+#PARAMETER EXPANSION#
+
+The shell provides several forms of parameter expansion for working with
+variables. In each form, {word} is subject to tilde expansion, parameter
+expansion, command substitution, and arithmetic expansion.
+
+If {parameter} is unset or null, the behavior depends on the operator used.
+"Unset" means the variable has never been assigned. "Null" means the variable
+is set but its value is the empty string.
+
+==============================================================================
+1. Basic Forms                                  *param-basic*
+
+  `$var`           Value of {var}
+  `${var}`         Same, with explicit braces (needed for `${var}foo`)
+
+Braces are required when {var} is followed by characters that could be part
+of the name, or when using any of the operators below.
+
+==============================================================================
+2. Default Values                               *param-default*
+
+  `${var:-word}`                                *param-default-val*
+
+      Use default value. If {var} is unset or null, expand to {word}.
+      Otherwise, expand to the value of {var}.
+
+      Example:
+        `name=${1:-world}`
+        `echo "hello $name"`    # prints "hello world" if \$1 is unset
+
+  `${var-word}`                                 *param-default-nonnull*
+
+      Like `:-` but only substitutes {word} if {var} is completely unset,
+      not if it is null.
+
+==============================================================================
+3. Assign Defaults                              *param-assign*
+
+  `${var:=word}`                                *param-assign-val*
+
+      Assign default value. If {var} is unset or null, assign {word} to
+      {var} and then expand to the new value.
+
+      Note: This cannot be used with positional parameters or special
+      parameters.
+
+      Example:
+        `echo ${cache:=/tmp/cache}`    # sets and uses \$cache
+
+  `${var=word}`                                 *param-assign-nonnull*
+
+      Like `:=` but only assigns if {var} is completely unset.
+
+==============================================================================
+4. Error on Unset                               *param-error*
+
+  `${var:?word}`                                *param-error-val*
+
+      Display error. If {var} is unset or null, print {word} to stderr
+      and exit (in a non-interactive shell). If {word} is omitted, a
+      default message is printed.
+
+      Example:
+        `input=${1:?usage: myscript \<filename\>}`
+
+  `${var?word}`                                 *param-error-nonnull*
+
+      Like `:?` but only errors if {var} is completely unset.
+
+==============================================================================
+5. Alternate Value                              *param-alt*
+
+  `${var:+word}`                                *param-alt-val*
+
+      Use alternate value. If {var} is unset or null, expand to nothing.
+      Otherwise, expand to {word}.
+
+      Example:
+        `echo ${verbose:+--verbose}`   # flag only if \$verbose is set
+
+  `${var+word}`                                 *param-alt-nonnull*
+
+      Like `:+` but substitutes {word} only if {var} is set (even if null).
+
+==============================================================================
+6. String Length                                *param-length*
+
+  `${#var}`                                     *param-strlen*
+
+      Expands to the length of the value of {var} in characters.
+
+      Example:
+        `str="hello"`
+        `echo ${#str}`         # prints 5
+
+==============================================================================
+7. Substring Removal                            *param-substring*
+
+  `${var#pattern}`                              *param-trim-short-left*
+
+      Remove shortest matching prefix. Removes the shortest match of
+      {pattern} from the beginning of the value of {var}.
+
+  `${var##pattern}`                             *param-trim-long-left*
+
+      Remove longest matching prefix.
+
+      Example:
+        `path="/home/user/file.txt"`
+        `echo ${path##*/}`     # prints "file.txt"
+
+  `${var%pattern}`                              *param-trim-short-right*
+
+      Remove shortest matching suffix. Removes the shortest match of
+      {pattern} from the end of the value of {var}.
+
+  `${var%%pattern}`                             *param-trim-long-right*
+
+      Remove longest matching suffix.
+
+      Example:
+        `file="archive.tar.gz"`
+        `echo ${file%%.*}`     # prints "archive"
+        `echo ${file%.*}`      # prints "archive.tar"
+
+==============================================================================
+8. Search and Replace                           *param-replace*
+
+  `${var/pattern/replacement}`                  *param-replace-first*
+
+      Replace first match. Replaces the first occurrence of {pattern}
+      in the value of {var} with {replacement}.
+
+  `${var//pattern/replacement}`                 *param-replace-all*
+
+      Replace all matches.
+
+      Example:
+        `str="hello world"`
+        `echo ${str/o/0}`      # prints "hell0 world"
+        `echo ${str//o/0}`     # prints "hell0 w0rld"
+
+  `${var/#pattern/replacement}`                 *param-replace-prefix*
+
+      Replace if matching at the beginning.
+
+  `${var/%pattern/replacement}`                 *param-replace-suffix*
+
+      Replace if matching at the end.
+
+==============================================================================
+9. Case Modification                            *param-case*
+
+  `${var^}`                                     *param-upper-first*
+
+      Uppercase the first character of {var}.
+
+  `${var^^}`                                    *param-upper-all*
+
+      Uppercase all characters.
+
+  `${var,}`                                     *param-lower-first*
+
+      Lowercase the first character of {var}.
+
+  `${var,,}`                                    *param-lower-all*
+
+      Lowercase all characters.
+
+      Example:
+        `name="john doe"`
+        `echo ${name^}`        # prints "John doe"
+        `echo ${name^^}`       # prints "JOHN DOE"
+
+==============================================================================
+10. Substrings                                  *param-slice*
+
+  `${var:offset}`                               *param-slice-from*
+
+      Substring starting at {offset} (0-indexed).
+
+  `${var:offset:length}`                        *param-slice-range*
+
+      Substring of {length} characters starting at {offset}.
+
+      Negative offsets count from the end (note the space before the minus
+      to distinguish from `:-`):
+
+        `str="hello world"`
+        `echo ${str: -5}`      # prints "world"
+        `echo ${str:0:5}`      # prints "hello"
+
+==============================================================================
+See also: |redirect| |glob| |arith|

doc/prompt.txt

@@ -0,0 +1,229 @@
+*prompt* *ps1* *psr* *prompt-expansion*
+
+#PROMPT#
+
+The shell displays a configurable prompt before each command. Two prompt
+strings are available: PS1 (the main prompt) and PSR (an optional
+right-aligned prompt).
+
+==============================================================================
+1. Setting the Prompt                          *prompt-set*
+
+  The prompt is controlled by the `PS1` and `PSR` environment variables.
+  Set them in your shell configuration:
+
+      `PS1='\u@\h:\W\$ '`
+      `PSR='$SHED_VI_MODE'`
+
+  Prompts are re-expanded before each display, so command substitutions
+  and functions are evaluated every time.
+
+==============================================================================
+2. Escape Sequences                            *prompt-escapes*
+
+  The following backslash escapes are recognized in PS1 and PSR:
+
+  `\u`                                         *prompt-user*
+
+      The current username (from $USER).
+
+  `\h`                                         *prompt-host*
+
+      The hostname (from $HOST).
+
+  `\w`                                         *prompt-pwd*
+
+      The current working directory, with $HOME replaced by `~`.
+
+      Example:
+        `/home/user/projects`  ->  `~/projects`
+
+  `\W`                                         *prompt-pwd-short*
+
+      Truncated working directory. Shows only the last N path segments,
+      where N is controlled by `shopt prompt.trunc_prompt_path`
+      (default: 4).
+
+      Example (with trunc_prompt_path=2):
+        `/home/user/projects/myapp`  ->  `projects/myapp`
+
+  `\s`                                         *prompt-shell*
+
+      The shell name: `shed`.
+
+  `\$`                                         *prompt-symbol*
+
+      `#` if the effective UID is 0 (root), `$` otherwise.
+
+  `\j`                                         *prompt-jobs*
+
+      The number of background jobs currently managed by the shell.
+
+  `\t`                                         *prompt-runtime-ms*
+
+      The runtime of the last command in milliseconds.
+
+  `\T`                                         *prompt-runtime-fmt*
+
+      The runtime of the last command in human-readable format
+      (e.g. `1m 23s 456ms`).
+
+  `\n`                                         *prompt-newline*
+
+      A literal newline. Use this to create multi-line prompts.
+
+  `\r`                                         *prompt-return*
+
+      A literal carriage return.
+
+  `\\`                                         *prompt-backslash*
+
+      A literal backslash.
+
+  `\e[...`                                     *prompt-ansi*
+
+      An ANSI escape sequence. The sequence starts with `\e[` and ends
+      at the first letter character. Used for colors and formatting.
+
+      Common codes:
+        `\e[0m`       reset all attributes
+        `\e[1m`       bold
+        `\e[3m`       italic
+        `\e[4m`       underline
+        `\e[31m`      red foreground
+        `\e[32m`      green foreground
+        `\e[33m`      yellow foreground
+        `\e[34m`      blue foreground
+        `\e[35m`      magenta foreground
+        `\e[36m`      cyan foreground
+        `\e[1;32m`    bold green
+
+      Example:
+        `PS1='\e[1;32m\u\e[0m@\e[34m\h\e[0m:\w\$ '`
+
+==============================================================================
+3. Functions in Prompts                        *prompt-functions*
+
+  `\@{funcname}`                               *prompt-func*
+  `\@funcname`
+
+      Call a shell function and insert its output. The function must
+      be defined before the prompt is expanded. If the function does
+      not exist, the literal sequence is displayed.
+
+      Example:
+        `git_branch() { git branch --show-current 2>/dev/null; }`
+        `PS1='\u@\h (\@git_branch)\$ '`
+
+      This allows dynamic prompt content that updates on every command.
+
+==============================================================================
+4. Right Prompt (PSR)                          *prompt-right* *psr*
+
+  The PSR variable defines an optional right-aligned prompt displayed
+  on the last line of PS1. It supports the same escape sequences as PS1.
+
+  PSR is only displayed when it fits: if the combined width of the
+  input line and PSR exceeds the terminal width, PSR is hidden.
+
+  PSR is restricted to a single line. If it contains newlines, only the
+  first line is used.
+
+      `PSR='$SHED_VI_MODE'`
+      `PSR='\T'`              # show last command runtime on the right
+
+==============================================================================
+5. Multi-Line Prompts                          *prompt-multiline*
+
+  PS1 may span multiple lines using `\n`. The editor tracks line
+  positions for proper cursor movement and redrawing.
+
+      `PS1='\e[1m\u@\h\e[0m\n\W\$ '`
+
+  This displays the username and hostname on the first line, and the
+  working directory and prompt symbol on the second.
+
+==============================================================================
+6. echo -p                                     *echo-prompt*
+
+  The `echo` builtin accepts a `-p` flag that enables prompt-style
+  expansion on its arguments. All prompt escape sequences listed above
+  are recognized.
+
+      `echo -p '\u'`          # prints the current username
+      `echo -p '\W'`          # prints the truncated working directory
+      `echo -p '\e[31mred\e[0m'`  # prints "red" in red
+
+  The `-p` flag can be combined with `-n` (no trailing newline) and
+  `-e` (interpret escape sequences like `\n` and `\t`). When both `-e`
+  and `-p` are used, prompt expansion runs first, then escape sequence
+  interpretation.
+
+==============================================================================
+7. Prompt Options (shopt)                      *prompt-options*
+
+  The following options under `shopt prompt.*` affect prompt behavior:
+
+  `prompt.trunc_prompt_path`                   *opt-trunc-path*
+
+      Maximum number of path segments shown by `\W`. Default: 4.
+
+  `prompt.highlight`                           *opt-highlight*
+
+      Enable syntax highlighting in the input line. Default: true.
+
+  `prompt.auto_indent`                         *opt-auto-indent*
+
+      Automatically indent new lines to match the current nesting
+      depth. Default: true.
+
+  `prompt.linebreak_on_incomplete`             *opt-linebreak*
+
+      Insert a newline when Enter is pressed on an incomplete command
+      (e.g. unclosed quotes or pipes). Default: true.
+
+  `prompt.line_numbers`                        *opt-line-numbers*
+
+      Display line numbers in the left margin for multi-line buffers.
+      Default: true.
+
+  `prompt.leader`                              *opt-leader*
+
+      The leader key sequence for |keymaps|. Default: `" "` (space).
+
+  `prompt.comp_limit`                          *opt-comp-limit*
+
+      Maximum number of completion candidates to display. Default: 100.
+
+  `prompt.completion_ignore_case`              *opt-comp-case*
+
+      Case-insensitive tab completion. Default: false.
+
+==============================================================================
+8. Special Variables                           *prompt-variables*
+
+  `SHED_VI_MODE`                               *var-vi-mode*
+
+      Set automatically before each prompt to the current vi mode name:
+      `NORMAL`, `INSERT`, `VISUAL`, `COMMAND`, `REPLACE`, `SEARCH`, or
+      `COMPLETE`. Useful in PSR or prompt functions.
+
+      Example:
+        `PSR='$SHED_VI_MODE'`
+
+==============================================================================
+9. Remote Refresh (SIGUSR1)                    *prompt-sigusr1*
+
+  Sending `SIGUSR1` to the shell process causes it to re-expand and
+  redraw the prompt. This is useful for updating the prompt from
+  external processes (e.g. a background script that detects a state
+  change).
+
+      `kill -USR1 $$`
+
+  Combined with prompt functions (see |prompt-func|), this allows the
+  prompt to reflect changes that happen outside the shell's normal
+  command cycle.
+
+==============================================================================
+See also: |keybinds| |autocmd| |ex|

doc/redirect.txt

@@ -0,0 +1,181 @@
+*redirect* *redirection* *redir*
+
+#REDIRECTION#
+
+Redirections allow you to control where a command reads its input from and
+where it sends its output. A redirection applies to a specific file
+descriptor; if no descriptor number is given, output redirections default
+to stdout (fd 1) and input redirections default to stdin (fd 0).
+
+==============================================================================
+1. Output Redirection                          *redir-output*
+
+  `command > file`                             *redir-out*
+
+      Redirect stdout to {file}, creating it if it does not exist or
+      truncating it if it does.
+
+      Example:
+        `echo hello > out.txt`
+        `ls 2> errors.txt`       # redirect stderr
+
+  `command >| file`                            *redir-out-force*
+
+      Like `>` but overrides the {noclobber} option. If {noclobber} is set,
+      `>` will refuse to overwrite an existing file; `>|` forces the
+      overwrite.
+
+  `command >> file`                            *redir-append*
+
+      Append stdout to {file}, creating it if it does not exist.
+
+      Example:
+        `echo line >> log.txt`
+
+==============================================================================
+2. Input Redirection                           *redir-input*
+
+  `command < file`                             *redir-in*
+
+      Redirect {file} to stdin.
+
+      Example:
+        `sort < unsorted.txt`
+
+==============================================================================
+3. Read-Write Redirection                      *redir-readwrite*
+
+  `command <> file`                            *redir-rw*
+
+      Open {file} for both reading and writing on the specified file
+      descriptor (default fd 0). The file is created if it does not exist
+      but is not truncated.
+
+      Useful with the `seek` builtin for random-access file operations.
+
+      Example:
+        `exec 3<> data.bin`
+        `seek 3 0 set`           # seek to beginning
+
+==============================================================================
+4. File Descriptor Duplication                 *redir-dup*
+
+  `command N>&M`                               *redir-dup-out*
+
+      Duplicate output file descriptor {M} onto {N}. After this, writing
+      to fd {N} goes to the same place as fd {M}.
+
+      Example:
+        `command > out.txt 2>&1`  # stderr goes where stdout goes
+
+  `command N<&M`                               *redir-dup-in*
+
+      Duplicate input file descriptor {M} onto {N}.
+
+  `command N>&-`                               *redir-close-out*
+  `command N<&-`                               *redir-close-in*
+
+      Close file descriptor {N}.
+
+      Example:
+        `exec 3>&-`              # close fd 3
+
+==============================================================================
+5. Pipelines                                   *redir-pipe*
+
+  `command1 | command2`                        *pipe*
+
+      Connect stdout of {command1} to stdin of {command2}. Both commands
+      run concurrently.
+
+      Example:
+        `cat file.txt | grep pattern | sort`
+
+  `command1 |& command2`                       *pipe-and*
+
+      Connect both stdout and stderr of {command1} to stdin of {command2}.
+      Equivalent to `command1 2>&1 | command2`.
+
+==============================================================================
+6. Here Documents                              *heredoc*
+
+  `command << DELIM`                           *redir-heredoc*
+
+      Read input from the script body until a line containing only {DELIM}
+      is found. The text between is fed to stdin of {command}.
+
+      Parameter expansion, command substitution, and arithmetic expansion
+      are performed in the body unless the delimiter is quoted.
+
+      Example:
+        `cat << EOF`
+        `Hello $USER`
+        `EOF`
+
+  `command << 'DELIM'`                         *redir-heredoc-literal*
+
+      Quoting the delimiter (single or double quotes) suppresses all
+      expansion in the heredoc body. The text is passed literally.
+
+      Example:
+        `cat << 'EOF'`
+        `This $variable is not expanded`
+        `EOF`
+
+  `command <<- DELIM`                          *redir-heredoc-indent*
+
+      Like `<<` but strips leading tab characters from each line of the
+      body and from the closing delimiter. This allows heredocs to be
+      indented for readability without affecting the content.
+
+      Example:
+        `if true; then`
+        `	cat <<- EOF`
+        `	indented content`
+        `	EOF`
+        `fi`
+
+==============================================================================
+7. Here Strings                                *herestring*
+
+  `command <<< word`                           *redir-herestring*
+
+      Feed {word} as a single string to stdin of {command}, with a
+      trailing newline appended. {word} is subject to the usual expansions.
+
+      Example:
+        `read first rest <<< "hello world"`
+        `bc <<< "2 + 2"`
+
+==============================================================================
+8. File Descriptor Numbers                     *redir-fd*
+
+  Any redirection operator can be prefixed with a file descriptor number:
+
+      `2> file`       redirect stderr to file
+      `3< file`       open file on fd 3
+      `4>> file`      append to file on fd 4
+      `5<> file`      open file read-write on fd 5
+
+  Standard file descriptors:
+
+      0   stdin
+      1   stdout
+      2   stderr
+
+  File descriptors 3 and above are available for general use with `exec`.
+
+==============================================================================
+9. Combining Redirections                      *redir-combine*
+
+  Multiple redirections can appear on a single command, processed left
+  to right:
+
+      `command > out.txt 2>&1`   # stdout to file, stderr to same file
+      `command 2>&1 > out.txt`   # different! stderr to terminal,
+                                 # stdout to file
+
+  Order matters: each redirection is applied in sequence.
+
+==============================================================================
+See also: |param| |glob| |arith|

flake.nix

@@ -14,7 +14,7 @@
   {
     packages.default = pkgs.rustPlatform.buildRustPackage {
       pname = "shed";
-      version = "0.5.0";
+      version = "0.6.2";
 
       src = self;
 

nix/hm-module.nix

@@ -2,325 +2,14 @@
 
 let
   cfg = config.programs.shed;
-  boolToString = b:
-  if b then "true" else "false";
-
-  mkAutoCmd = cfg:
-    lib.concatLines (map (hook: "autocmd ${hook} ${lib.optionalString (cfg.pattern != null) "-p \"${cfg.pattern}\""} '${cfg.command}'") cfg.hooks);
-
-
-  mkFunctionDef = name: body:
-  let
-    indented = "\t" + lib.concatStringsSep "\n\t" (lib.splitString "\n" body);
-  in
-    ''
-${name}() {
-${indented}
-}'';
-
-  mkKeymapCmd = cfg: let
-    flags = "-${lib.concatStrings cfg.modes}";
-    keys = "'${cfg.keys}'";
-    action = "'${cfg.command}'";
-  in
-    "keymap ${flags} ${keys} ${action}";
-
-
-  mkCompleteCmd = name: cfg: let
-    flags = lib.concatStrings [
-      (lib.optionalString cfg.files " -f")
-      (lib.optionalString cfg.dirs " -d")
-      (lib.optionalString cfg.commands " -c")
-      (lib.optionalString cfg.variables " -v")
-      (lib.optionalString cfg.users " -u")
-      (lib.optionalString cfg.jobs " -j")
-      (lib.optionalString cfg.aliases " -a")
-      (lib.optionalString cfg.signals " -S")
-      (lib.optionalString cfg.noSpace " -n")
-      (lib.optionalString (cfg.function != null) " -F ${cfg.function}")
-      (lib.optionalString (cfg.fallback != "no") " -o ${cfg.fallback}")
-      (lib.optionalString (cfg.wordList != []) " -W '${lib.concatStringsSep " " cfg.wordList}'")
-
-    ];
-  in "complete${flags} ${name}";
 in
 {
-  options.programs.shed = {
+  options.programs.shed = import ./shed_opts.nix { inherit pkgs lib; };
-    enable = lib.mkEnableOption "shed shell";
-
-    package = lib.mkOption {
-      type = lib.types.package;
-      default = pkgs.shed;
-      description = "The shed package to use";
-    };
-
-    aliases = lib.mkOption {
-      type = lib.types.attrsOf lib.types.str;
-      default = {};
-      description = "Aliases to set when shed starts";
-    };
-
-    functions = lib.mkOption {
-      type = lib.types.attrsOf lib.types.str;
-      default = {};
-      description = "Shell functions to set when shed starts";
-    };
-
-    autocmds = lib.mkOption {
-      type = lib.types.listOf (lib.types.submodule {
-        options = {
-          hooks = lib.mkOption {
-            type = lib.types.addCheck (lib.types.listOf (lib.types.enum [
-              "pre-cmd"
-              "post-cmd"
-              "pre-change-dir"
-              "post-change-dir"
-              "on-job-finish"
-              "pre-prompt"
-              "post-prompt"
-              "pre-mode-change"
-              "post-mode-change"
-              "on-exit"
-              "on-history-open"
-              "on-history-close"
-              "on-history-select"
-              "on-completion-start"
-              "on-completion-cancel"
-              "on-completion-select"
-            ])) (list: list != []);
-            description = "The events that trigger this autocmd";
-          };
-          pattern = lib.mkOption {
-            type = lib.types.nullOr lib.types.str;
-            default = null;
-            description = "A regex pattern to use in the hook to determine whether it runs or not. What it's compared to differs by hook, for instance 'pre-change-dir' compares it to the new directory, pre-cmd compares it to the command, etc";
-          };
-          command = lib.mkOption {
-            type = lib.types.addCheck lib.types.str (cmd: cmd != "");
-            description = "The shell command to execute when the hook is triggered and the pattern (if provided) matches";
-          };
-        };
-
-      });
-      default = [];
-      description = "Custom autocmds to set when shed starts";
-    };
-
-    keymaps = lib.mkOption {
-      type = lib.types.listOf (lib.types.submodule {
-        options = {
-          modes = lib.mkOption {
-            type = lib.types.listOf (lib.types.enum [ "n" "i" "x" "v" "o" "r" ]);
-            default = [];
-            description = "The editing modes this keymap can be used in";
-          };
-          keys = lib.mkOption {
-            type = lib.types.str;
-            default = "";
-            description = "The sequence of keys that trigger this keymap";
-          };
-          command = lib.mkOption {
-            type = lib.types.str;
-            default = "";
-            description = "The sequence of characters to send to the line editor when the keymap is triggered.";
-          };
-        };
-      });
-      default = [];
-      description = "Custom keymaps to set when shed starts";
-    };
-
-    extraCompletion = lib.mkOption {
-      type = lib.types.attrsOf (lib.types.submodule {
-        options = {
-          files = lib.mkOption {
-            type = lib.types.bool;
-            default = false;
-            description = "Complete file names in the current directory";
-          };
-          dirs = lib.mkOption {
-            type = lib.types.bool;
-            default = false;
-            description = "Complete directory names in the current directory";
-          };
-          commands = lib.mkOption {
-            type = lib.types.bool;
-            default = false;
-            description = "Complete executable commands in the PATH";
-          };
-          variables = lib.mkOption {
-            type = lib.types.bool;
-            default = false;
-            description = "Complete variable names";
-          };
-          users = lib.mkOption {
-            type = lib.types.bool;
-            default = false;
-            description = "Complete user names from /etc/passwd";
-          };
-          jobs = lib.mkOption {
-            type = lib.types.bool;
-            default = false;
-            description = "Complete job names or pids from the current shell session";
-          };
-          aliases = lib.mkOption {
-            type = lib.types.bool;
-            default = false;
-            description = "Complete alias names defined in the current shell session";
-          };
-          signals = lib.mkOption {
-            type = lib.types.bool;
-            default = false;
-            description = "Complete signal names for commands like kill";
-          };
-          wordList = lib.mkOption {
-            type = lib.types.listOf lib.types.str;
-            default = [];
-            description = "Complete from a custom list of words";
-          };
-          function = lib.mkOption {
-            type = lib.types.nullOr lib.types.str;
-            default = null;
-            description = "Complete using a custom shell function (should be defined in extraCompletionPreConfig)";
-          };
-          noSpace = lib.mkOption {
-            type = lib.types.bool;
-            default = false;
-            description = "Don't append a space after completion";
-          };
-          fallback = lib.mkOption {
-            type = lib.types.enum [ "no" "default" "dirnames" ];
-            default = "no";
-            description = "Fallback behavior when no matches are found: 'no' means no fallback, 'default' means fall back to the default shell completion behavior, and 'directories' means fall back to completing directory names";
-          };
-
-        };
-      });
-      default = {};
-      description = "Additional completion scripts to source when shed starts (e.g. for custom tools or functions)";
-    };
-
-    environmentVars = lib.mkOption {
-      type = lib.types.attrsOf lib.types.str;
-      default = {};
-      description = "Environment variables to set when shed starts";
-    };
-
-    settings = {
-      dotGlob = lib.mkOption {
-        type = lib.types.bool;
-        default = false;
-        description = "Whether to include hidden files in glob patterns";
-      };
-      autocd = lib.mkOption {
-        type = lib.types.bool;
-        default = false;
-        description = "Whether to automatically change into directories when they are entered as commands";
-      };
-      historyIgnoresDupes = lib.mkOption {
-        type = lib.types.bool;
-        default = false;
-        description = "Whether to ignore duplicate entries in the command history";
-      };
-      maxHistoryEntries = lib.mkOption {
-        type = lib.types.int;
-        default = 10000;
-        description = "The maximum number of entries to keep in the command history";
-      };
-      interactiveComments = lib.mkOption {
-        type = lib.types.bool;
-        default = true;
-        description = "Whether to allow comments in interactive mode";
-      };
-      autoHistory = lib.mkOption {
-        type = lib.types.bool;
-        default = true;
-        description = "Whether to automatically add commands to the history as they are executed";
-      };
-      bellEnabled = lib.mkOption {
-        type = lib.types.bool;
-        default = true;
-        description = "Whether to allow shed to ring the terminal bell on certain events (e.g. command completion, errors, etc.)";
-      };
-      maxRecurseDepth = lib.mkOption {
-        type = lib.types.int;
-        default = 1000;
-        description = "The maximum depth to allow when recursively executing shell functions";
-      };
-
-      leaderKey = lib.mkOption {
-        type = lib.types.str;
-        default = "\\\\";
-        description = "The leader key to use for custom keymaps (e.g. if set to '\\\\', then a keymap with keys='x' would be triggered by '\\x')";
-      };
-      promptPathSegments = lib.mkOption {
-        type = lib.types.int;
-        default = 4;
-        description = "The maximum number of path segments to show in the prompt";
-      };
-      completionLimit = lib.mkOption {
-        type = lib.types.int;
-        default = 1000;
-        description = "The maximum number of completion candidates to show before truncating the list";
-      };
-      syntaxHighlighting = lib.mkOption {
-        type = lib.types.bool;
-        default = true;
-        description = "Whether to enable syntax highlighting in the shell";
-      };
-      linebreakOnIncomplete = lib.mkOption {
-        type = lib.types.bool;
-        default = true;
-        description = "Whether to automatically insert a newline when the input is incomplete";
-      };
-      extraPostConfig = lib.mkOption {
-        type = lib.types.str;
-        default = "";
-        description = "Additional configuration to append to the shed configuration file";
-      };
-      extraPreConfig = lib.mkOption {
-        type = lib.types.str;
-        default = "";
-        description = "Additional configuration to prepend to the shed configuration file";
-      };
-    };
-  };
 
   config =
-  let
-    completeLines = lib.concatLines (lib.mapAttrsToList mkCompleteCmd cfg.extraCompletion);
-    keymapLines = lib.concatLines (map mkKeymapCmd cfg.keymaps);
-    functionLines = lib.concatLines (lib.mapAttrsToList mkFunctionDef cfg.functions);
-    autocmdLines = lib.concatLines (map mkAutoCmd cfg.autocmds);
-  in
   lib.mkIf cfg.enable {
     home.packages = [ cfg.package ];
 
-    home.file.".shedrc".text = lib.concatLines [
+    home.file.".shedrc".text = import ./render_rc.nix lib cfg;
-      cfg.settings.extraPreConfig
-      (lib.concatLines (lib.mapAttrsToList (name: value: "export ${name}=\"${value}\"") cfg.environmentVars))
-      (lib.concatLines (lib.mapAttrsToList (name: value: "alias ${name}=\"${value}\"") cfg.aliases))
-      (lib.concatLines [
-        "shopt core.dotglob=${boolToString cfg.settings.dotGlob}"
-        "shopt core.autocd=${boolToString cfg.settings.autocd}"
-        "shopt core.hist_ignore_dupes=${boolToString cfg.settings.historyIgnoresDupes}"
-        "shopt core.max_hist=${toString cfg.settings.maxHistoryEntries}"
-        "shopt core.interactive_comments=${boolToString cfg.settings.interactiveComments}"
-        "shopt core.auto_hist=${boolToString cfg.settings.autoHistory}"
-        "shopt core.bell_enabled=${boolToString cfg.settings.bellEnabled}"
-        "shopt core.max_recurse_depth=${toString cfg.settings.maxRecurseDepth}"
-
-        "shopt prompt.leader='${cfg.settings.leaderKey}'"
-        "shopt prompt.trunc_prompt_path=${toString cfg.settings.promptPathSegments}"
-        "shopt prompt.comp_limit=${toString cfg.settings.completionLimit}"
-        "shopt prompt.highlight=${boolToString cfg.settings.syntaxHighlighting}"
-        "shopt prompt.linebreak_on_incomplete=${boolToString cfg.settings.linebreakOnIncomplete}"
-        functionLines
-        completeLines
-        keymapLines
-        autocmdLines
-      ])
-      cfg.settings.extraPostConfig
-    ];
   };
 }

nix/module.nix

@@ -4,18 +4,11 @@ let
   cfg = config.programs.shed;
 in
 {
-  options.programs.shed = {
+  options.programs.shed = import ./shed_opts.nix { inherit pkgs lib; };
-    enable = lib.mkEnableOption "shed shell";
-
-    package = lib.mkOption {
-      type = lib.types.package;
-      default = pkgs.shed;
-      description = "The shed package to use";
-    };
-  };
 
   config = lib.mkIf cfg.enable {
     environment.systemPackages = [ cfg.package ];
     environment.shells = [ cfg.package ];
+    environment.etc."shed/shedrc".text = import ./render_rc.nix lib cfg;
   };
 }

nix/render_rc.nix

@@ -0,0 +1,86 @@
+lib: cfg:
+
+let
+  boolToString = b:
+  if b then "true" else "false";
+
+  mkAutoCmd = cfg:
+    lib.concatLines (map (hook: "autocmd ${hook} ${lib.optionalString (cfg.pattern != null) "-p \"${cfg.pattern}\""} '${cfg.command}'") cfg.hooks);
+
+
+  mkFunctionDef = name: body:
+  let
+    indented = "\t" + lib.concatStringsSep "\n\t" (lib.splitString "\n" body);
+  in
+    ''
+${name}() {
+${indented}
+}'';
+
+  mkKeymapCmd = cfg: let
+    flags = "-${lib.concatStrings cfg.modes}";
+    keys = "'${cfg.keys}'";
+    action = "'${cfg.command}'";
+  in
+    "keymap ${flags} ${keys} ${action}";
+
+
+  mkCompleteCmd = name: cfg: let
+    flags = lib.concatStrings [
+      (lib.optionalString cfg.files " -f")
+      (lib.optionalString cfg.dirs " -d")
+      (lib.optionalString cfg.commands " -c")
+      (lib.optionalString cfg.variables " -v")
+      (lib.optionalString cfg.users " -u")
+      (lib.optionalString cfg.jobs " -j")
+      (lib.optionalString cfg.aliases " -a")
+      (lib.optionalString cfg.signals " -S")
+      (lib.optionalString cfg.noSpace " -n")
+      (lib.optionalString (cfg.function != null) " -F ${cfg.function}")
+      (lib.optionalString (cfg.fallback != "no") " -o ${cfg.fallback}")
+      (lib.optionalString (cfg.wordList != []) " -W '${lib.concatStringsSep " " cfg.wordList}'")
+
+    ];
+  in "complete${flags} ${name}";
+
+  completeLines = lib.concatLines (lib.mapAttrsToList mkCompleteCmd cfg.extraCompletion);
+  keymapLines = lib.concatLines (map mkKeymapCmd cfg.keymaps);
+  functionLines = lib.concatLines (lib.mapAttrsToList mkFunctionDef cfg.functions);
+  autocmdLines = lib.concatLines (map mkAutoCmd cfg.autocmds);
+in
+lib.concatLines [
+      cfg.extraPreConfig
+      (lib.concatLines (lib.mapAttrsToList (name: value: "export ${name}=\"${value}\"") cfg.environmentVars))
+      (lib.concatLines (lib.mapAttrsToList (name: value: "alias ${name}=\"${value}\"") cfg.aliases))
+      (lib.concatLines [
+        "shopt line.viewport_height=${toString cfg.shopts.line.viewport_height}"
+        "shopt line.scroll_offset=${toString cfg.shopts.line.scroll_offset}"
+
+        "shopt core.dotglob=${boolToString cfg.shopts.core.dotglob}"
+        "shopt core.autocd=${boolToString cfg.shopts.core.autocd}"
+        "shopt core.hist_ignore_dupes=${boolToString cfg.shopts.core.hist_ignore_dupes}"
+        "shopt core.max_hist=${toString cfg.shopts.core.max_hist}"
+        "shopt core.interactive_comments=${boolToString cfg.shopts.core.interactive_comments}"
+        "shopt core.auto_hist=${boolToString cfg.shopts.core.auto_hist}"
+        "shopt core.bell_enabled=${boolToString cfg.shopts.core.bell_enabled}"
+        "shopt core.max_recurse_depth=${toString cfg.shopts.core.max_recurse_depth}"
+        "shopt core.xpg_echo=${boolToString cfg.shopts.core.xpg_echo}"
+        "shopt core.noclobber=${boolToString cfg.shopts.core.noclobber}"
+
+        "shopt prompt.leader='${cfg.shopts.prompt.leader}'"
+        "shopt prompt.trunc_prompt_path=${toString cfg.shopts.prompt.trunc_prompt_path}"
+        "shopt prompt.comp_limit=${toString cfg.shopts.prompt.comp_limit}"
+        "shopt prompt.highlight=${boolToString cfg.shopts.prompt.highlight}"
+        "shopt prompt.linebreak_on_incomplete=${boolToString cfg.shopts.prompt.linebreak_on_incomplete}"
+        "shopt prompt.line_numbers=${boolToString cfg.shopts.prompt.line_numbers}"
+        "shopt prompt.screensaver_idle_time=${toString cfg.shopts.prompt.screensaver_idle_time}"
+        "shopt prompt.screensaver_cmd='${cfg.shopts.prompt.screensaver_cmd}'"
+        "shopt prompt.completion_ignore_case=${boolToString cfg.shopts.prompt.completion_ignore_case}"
+        "shopt prompt.auto_indent=${boolToString cfg.shopts.prompt.auto_indent}"
+        functionLines
+        completeLines
+        keymapLines
+        autocmdLines
+      ])
+      cfg.extraPostConfig
+    ]

nix/shed_opts.nix

@@ -0,0 +1,316 @@
+{ pkgs, lib }:
+
+{
+  enable = lib.mkEnableOption "shed shell";
+
+  package = lib.mkOption {
+    type = lib.types.package;
+    default = pkgs.shed;
+    description = "The shed package to use";
+  };
+
+  aliases = lib.mkOption {
+    type = lib.types.attrsOf lib.types.str;
+    default = {};
+    description = "Aliases to set when shed starts";
+  };
+
+  functions = lib.mkOption {
+    type = lib.types.attrsOf lib.types.str;
+    default = {};
+    description = "Shell functions to set when shed starts";
+  };
+
+  autocmds = lib.mkOption {
+    type = lib.types.listOf (lib.types.submodule {
+      options = {
+        hooks = lib.mkOption {
+          type = lib.types.addCheck (lib.types.listOf (lib.types.enum [
+            "pre-cmd"
+            "post-cmd"
+            "pre-change-dir"
+            "post-change-dir"
+            "on-job-finish"
+            "pre-prompt"
+            "post-prompt"
+            "pre-mode-change"
+            "post-mode-change"
+            "on-exit"
+            "on-history-open"
+            "on-history-close"
+            "on-history-select"
+            "on-completion-start"
+            "on-completion-cancel"
+            "on-completion-select"
+          ])) (list: list != []);
+          description = "The events that trigger this autocmd";
+        };
+        pattern = lib.mkOption {
+          type = lib.types.nullOr lib.types.str;
+          default = null;
+          description = "A regex pattern to use in the hook to determine whether it runs or not. What it's compared to differs by hook, for instance 'pre-change-dir' compares it to the new directory, pre-cmd compares it to the command, etc";
+        };
+        command = lib.mkOption {
+          type = lib.types.addCheck lib.types.str (cmd: cmd != "");
+          description = "The shell command to execute when the hook is triggered and the pattern (if provided) matches";
+        };
+      };
+
+    });
+    default = [];
+    description = "Custom autocmds to set when shed starts";
+  };
+
+  keymaps = lib.mkOption {
+    type = lib.types.listOf (lib.types.submodule {
+      options = {
+        modes = lib.mkOption {
+          type = lib.types.listOf (lib.types.enum [ "n" "i" "x" "v" "o" "r" ]);
+          default = [];
+          description = "The editing modes this keymap can be used in";
+        };
+        keys = lib.mkOption {
+          type = lib.types.str;
+          default = "";
+          description = "The sequence of keys that trigger this keymap";
+        };
+        command = lib.mkOption {
+          type = lib.types.str;
+          default = "";
+          description = "The sequence of characters to send to the line editor when the keymap is triggered.";
+        };
+      };
+    });
+    default = [];
+    description = "Custom keymaps to set when shed starts";
+  };
+
+  extraCompletion = lib.mkOption {
+    type = lib.types.attrsOf (lib.types.submodule {
+      options = {
+        files = lib.mkOption {
+          type = lib.types.bool;
+          default = false;
+          description = "Complete file names in the current directory";
+        };
+        dirs = lib.mkOption {
+          type = lib.types.bool;
+          default = false;
+          description = "Complete directory names in the current directory";
+        };
+        commands = lib.mkOption {
+          type = lib.types.bool;
+          default = false;
+          description = "Complete executable commands in the PATH";
+        };
+        variables = lib.mkOption {
+          type = lib.types.bool;
+          default = false;
+          description = "Complete variable names";
+        };
+        users = lib.mkOption {
+          type = lib.types.bool;
+          default = false;
+          description = "Complete user names from /etc/passwd";
+        };
+        jobs = lib.mkOption {
+          type = lib.types.bool;
+          default = false;
+          description = "Complete job names or pids from the current shell session";
+        };
+        aliases = lib.mkOption {
+          type = lib.types.bool;
+          default = false;
+          description = "Complete alias names defined in the current shell session";
+        };
+        signals = lib.mkOption {
+          type = lib.types.bool;
+          default = false;
+          description = "Complete signal names for commands like kill";
+        };
+        wordList = lib.mkOption {
+          type = lib.types.listOf lib.types.str;
+          default = [];
+          description = "Complete from a custom list of words";
+        };
+        function = lib.mkOption {
+          type = lib.types.nullOr lib.types.str;
+          default = null;
+          description = "Complete using a custom shell function (should be defined in extraCompletionPreConfig)";
+        };
+        noSpace = lib.mkOption {
+          type = lib.types.bool;
+          default = false;
+          description = "Don't append a space after completion";
+        };
+        fallback = lib.mkOption {
+          type = lib.types.enum [ "no" "default" "dirnames" ];
+          default = "no";
+          description = "Fallback behavior when no matches are found: 'no' means no fallback, 'default' means fall back to the default shell completion behavior, and 'directories' means fall back to completing directory names";
+        };
+
+      };
+    });
+    default = {};
+    description = "Additional completion scripts to source when shed starts (e.g. for custom tools or functions)";
+  };
+
+  environmentVars = lib.mkOption {
+    type = lib.types.attrsOf lib.types.str;
+    default = {};
+    description = "Environment variables to set when shed starts";
+  };
+
+  shopts = lib.mkOption {
+    type = lib.types.submodule {
+      options = {
+        line = lib.mkOption {
+          type = lib.types.submodule {
+            options = {
+              viewport_height = lib.mkOption {
+                type = lib.types.either lib.types.int lib.types.str;
+                default = "50%";
+                description = "Maximum viewport height for the line editor buffer";
+              };
+              scroll_offset = lib.mkOption {
+                type = lib.types.int;
+                default = 1;
+                description = "The minimum number of lines to keep visible above and below the cursor when scrolling (i.e. the 'scrolloff' option in vim)";
+              };
+            };
+          };
+          default = {};
+          description = "Settings related to the line editor (i.e. the 'shopt line.*' options)";
+        };
+        core = lib.mkOption {
+          type = lib.types.submodule {
+            options = {
+              dotglob = lib.mkOption {
+                type = lib.types.bool;
+                default = false;
+                description = "Whether to include hidden files in glob patterns";
+              };
+              autocd = lib.mkOption {
+                type = lib.types.bool;
+                default = false;
+                description = "Whether to automatically change into directories when they are entered as commands";
+              };
+              hist_ignore_dupes = lib.mkOption {
+                type = lib.types.bool;
+                default = false;
+                description = "Whether to ignore duplicate entries in the command history";
+              };
+              max_hist = lib.mkOption {
+                type = lib.types.int;
+                default = 10000;
+                description = "The maximum number of entries to keep in the command history";
+              };
+              interactive_comments = lib.mkOption {
+                type = lib.types.bool;
+                default = true;
+                description = "Whether to allow comments in interactive mode";
+              };
+              auto_hist = lib.mkOption {
+                type = lib.types.bool;
+                default = true;
+                description = "Whether to automatically add commands to the history as they are executed";
+              };
+              bell_enabled = lib.mkOption {
+                type = lib.types.bool;
+                default = true;
+                description = "Whether to allow shed to ring the terminal bell on certain events (e.g. command completion, errors, etc.)";
+              };
+              max_recurse_depth = lib.mkOption {
+                type = lib.types.int;
+                default = 1000;
+                description = "The maximum depth to allow when recursively executing shell functions";
+              };
+              xpg_echo = lib.mkOption {
+                type = lib.types.bool;
+                default = false;
+                description = "Whether to have the 'echo' builtin expand escape sequences like \\n and \\t (if false, it will print them verbatim)";
+              };
+              noclobber = lib.mkOption {
+                type = lib.types.bool;
+                default = false;
+                description = "Whether to prevent redirection from overwriting existing files by default (i.e. behave as if 'set -o noclobber' is always in effect)";
+              };
+            };
+          };
+          default = {};
+          description = "Core settings (i.e. the 'shopt core.*' options)";
+        };
+        prompt = lib.mkOption {
+          type = lib.types.submodule {
+            options = {
+              leader = lib.mkOption {
+                type = lib.types.str;
+                default = "\\\\";
+                description = "The leader key to use for custom keymaps (e.g. if set to '\\\\', then a keymap with keys='x' would be triggered by '\\x')";
+              };
+              trunc_prompt_path = lib.mkOption {
+                type = lib.types.int;
+                default = 4;
+                description = "The maximum number of path segments to show in the prompt";
+              };
+              comp_limit = lib.mkOption {
+                type = lib.types.int;
+                default = 1000;
+                description = "The maximum number of completion candidates to show before truncating the list";
+              };
+              highlight = lib.mkOption {
+                type = lib.types.bool;
+                default = true;
+                description = "Whether to enable syntax highlighting in the shell";
+              };
+              linebreak_on_incomplete = lib.mkOption {
+                type = lib.types.bool;
+                default = true;
+                description = "Whether to automatically insert a newline when the input is incomplete";
+              };
+              line_numbers = lib.mkOption {
+                type = lib.types.bool;
+                default = false;
+                description = "Whether to show line numbers in the prompt";
+              };
+              screensaver_cmd = lib.mkOption {
+                type = lib.types.str;
+                default = "";
+                description = "A shell command to execute after a period of inactivity (i.e. a custom screensaver)";
+              };
+              screensaver_idle_time = lib.mkOption {
+                type = lib.types.int;
+                default = 0;
+                description = "The amount of inactivity time in seconds before the screensaver command is executed";
+              };
+              completion_ignore_case = lib.mkOption {
+                type = lib.types.bool;
+                default = false;
+                description = "Whether to ignore case when completing commands and file names";
+              };
+              auto_indent = lib.mkOption {
+                type = lib.types.bool;
+                default = true;
+                description = "Whether to automatically indent new lines based on the previous line";
+              };
+            };
+          };
+          default = {};
+          description = "Settings related to the prompt (i.e. the 'shopt prompt.*' options)";
+        };
+      };
+    };
+    default = {};
+  };
+
+  extraPostConfig = lib.mkOption {
+    type = lib.types.str;
+    default = "";
+    description = "Additional configuration to append to the shed configuration file";
+  };
+  extraPreConfig = lib.mkOption {
+    type = lib.types.str;
+    default = "";
+    description = "Additional configuration to prepend to the shed configuration file";
+  };
+}

src/builtin/alias.rs

@@ -38,7 +38,6 @@ pub fn alias(node: Node) -> ShResult<()> {
     write(stdout, alias_output.as_bytes())?; // Write it
   } else {
     for (arg, span) in argv {
-
       let Some((name, body)) = arg.split_once('=') else {
         let Some(alias) = read_logic(|l| l.get_alias(&arg)) else {
           return Err(ShErr::at(
@@ -59,7 +58,10 @@ pub fn alias(node: Node) -> ShResult<()> {
         return Err(ShErr::at(
           ShErrKind::ExecFail,
           span,
-          format!("alias: Cannot assign alias to reserved name '{}'", name.fg(next_color())),
+          format!(
+            "alias: Cannot assign alias to reserved name '{}'",
+            name.fg(next_color())
+          ),
         ));
       }
       write_logic(|l| l.insert_alias(name, body, span.clone()));

src/builtin/arrops.rs

@@ -229,9 +229,9 @@ pub fn get_arr_op_opts(opts: Vec<Opt>) -> ShResult<ArrOpOpts> {
 
 #[cfg(test)]
 mod tests {
-  use std::collections::VecDeque;
+  use crate::state::{self, VarFlags, VarKind, read_vars, write_vars};
-  use crate::state::{self, read_vars, write_vars, VarFlags, VarKind};
   use crate::testutil::{TestGuard, test_input};
+  use std::collections::VecDeque;
 
   fn set_arr(name: &str, elems: &[&str]) {
     let arr = VecDeque::from_iter(elems.iter().map(|s| s.to_string()));

src/builtin/autocmd.rs

@@ -159,7 +159,10 @@ mod tests {
     test_input("autocmd post-cmd 'echo post'").unwrap();
 
     assert_eq!(read_logic(|l| l.get_autocmds(AutoCmdKind::PreCmd)).len(), 1);
-    assert_eq!(read_logic(|l| l.get_autocmds(AutoCmdKind::PostCmd)).len(), 1);
+    assert_eq!(
+      read_logic(|l| l.get_autocmds(AutoCmdKind::PostCmd)).len(),
+      1
+    );
   }
 
   // ===================== Pattern =====================
@@ -205,7 +208,10 @@ mod tests {
 
     test_input("autocmd -c pre-cmd").unwrap();
     assert_eq!(read_logic(|l| l.get_autocmds(AutoCmdKind::PreCmd)).len(), 0);
-    assert_eq!(read_logic(|l| l.get_autocmds(AutoCmdKind::PostCmd)).len(), 1);
+    assert_eq!(
+      read_logic(|l| l.get_autocmds(AutoCmdKind::PostCmd)).len(),
+      1
+    );
   }
 
   #[test]
@@ -245,11 +251,21 @@ mod tests {
   fn all_kinds_parse() {
     let _guard = TestGuard::new();
     let kinds = [
-      "pre-cmd", "post-cmd", "pre-change-dir", "post-change-dir",
+      "pre-cmd",
-      "on-job-finish", "pre-prompt", "post-prompt",
+      "post-cmd",
-      "pre-mode-change", "post-mode-change",
+      "pre-change-dir",
-      "on-history-open", "on-history-close", "on-history-select",
+      "post-change-dir",
-      "on-completion-start", "on-completion-cancel", "on-completion-select",
+      "on-job-finish",
+      "pre-prompt",
+      "post-prompt",
+      "pre-mode-change",
+      "post-mode-change",
+      "on-history-open",
+      "on-history-close",
+      "on-history-select",
+      "on-completion-start",
+      "on-completion-cancel",
+      "on-completion-select",
       "on-exit",
     ];
     for kind in kinds {

src/builtin/cd.rs

@@ -99,7 +99,10 @@ pub mod tests {
     let new_dir = env::current_dir().unwrap();
     assert_ne!(old_dir, new_dir);
 
-		assert_eq!(new_dir.display().to_string(), temp_dir.path().display().to_string());
+    assert_eq!(
+      new_dir.display().to_string(),
+      temp_dir.path().display().to_string()
+    );
   }
 
   #[test]
@@ -111,7 +114,10 @@ pub mod tests {
     test_input("cd").unwrap();
 
     let cwd = env::current_dir().unwrap();
-		assert_eq!(cwd.display().to_string(), temp_dir.path().display().to_string());
+    assert_eq!(
+      cwd.display().to_string(),
+      temp_dir.path().display().to_string()
+    );
   }
 
   #[test]

src/builtin/complete.rs

@@ -316,10 +316,10 @@ pub fn get_comp_opts(opts: Vec<Opt>) -> ShResult<CompOpts> {
 
 #[cfg(test)]
 mod tests {
+  use crate::state::{self, VarFlags, VarKind, read_meta, write_vars};
+  use crate::testutil::{TestGuard, test_input};
   use std::fs;
   use tempfile::TempDir;
-  use crate::state::{self, read_meta, write_vars, VarFlags, VarKind};
-  use crate::testutil::{TestGuard, test_input};
 
   // ===================== complete: Registration =====================
 

src/builtin/dirstack.rs

@@ -13,7 +13,8 @@ use crate::{
 
 pub fn truncate_home_path(path: String) -> String {
   if let Ok(home) = env::var("HOME")
-	&& path.starts_with(&home) {
+    && path.starts_with(&home)
+  {
     let new = path.strip_prefix(&home).unwrap();
     return format!("~{new}");
   }
@@ -376,8 +377,7 @@ pub fn dirs(node: Node) -> ShResult<()> {
       .map(|d| d.to_string_lossy().to_string());
 
     if abbreviate_home {
-      stack.map(truncate_home_path)
+      stack.map(truncate_home_path).collect()
-        .collect()
     } else {
       stack.collect()
     }
@@ -428,10 +428,13 @@ pub fn dirs(node: Node) -> ShResult<()> {
 
 #[cfg(test)]
 pub mod tests {
+  use crate::{
+    state::{self, read_meta},
+    testutil::{TestGuard, test_input},
+  };
+  use pretty_assertions::{assert_eq, assert_ne};
   use std::{env, path::PathBuf};
-	use crate::{state::{self, read_meta}, testutil::{TestGuard, test_input}};
+  use tempfile::TempDir;
-	use pretty_assertions::{assert_ne,assert_eq};
-use tempfile::TempDir;
 
   #[test]
   fn test_pushd_interactive() {
@@ -580,8 +583,14 @@ use tempfile::TempDir;
     let out = g.read_output();
     let lines: Vec<&str> = out.split('\n').filter(|l| !l.is_empty()).collect();
     assert_eq!(lines.len(), 2);
-		assert_eq!(lines[0], super::truncate_home_path(path.to_string_lossy().to_string()));
+    assert_eq!(
-		assert_eq!(lines[1], super::truncate_home_path(original.to_string_lossy().to_string()));
+      lines[0],
+      super::truncate_home_path(path.to_string_lossy().to_string())
+    );
+    assert_eq!(
+      lines[1],
+      super::truncate_home_path(original.to_string_lossy().to_string())
+    );
   }
 
   #[test]

src/builtin/echo.rs

@@ -57,7 +57,8 @@ pub fn echo(node: Node) -> ShResult<()> {
   let output_channel = borrow_fd(STDOUT_FILENO);
   let xpg_echo = read_shopts(|o| o.core.xpg_echo); // If true, echo expands escape sequences by default, and -E opts out
 
-	let use_escape = (xpg_echo && !flags.contains(EchoFlags::NO_ESCAPE)) || flags.contains(EchoFlags::USE_ESCAPE);
+  let use_escape =
+    (xpg_echo && !flags.contains(EchoFlags::NO_ESCAPE)) || flags.contains(EchoFlags::USE_ESCAPE);
 
   let mut echo_output = prepare_echo_args(
     argv
@@ -308,11 +309,7 @@ mod tests {
 
   #[test]
   fn prepare_multiple_args() {
-    let result = prepare_echo_args(
+    let result = prepare_echo_args(vec!["hello".into(), "world".into()], false, false).unwrap();
-      vec!["hello".into(), "world".into()],
-      false,
-      false,
-    ).unwrap();
     assert_eq!(result, vec!["hello", "world"]);
   }
 

src/builtin/eval.rs

@@ -37,7 +37,7 @@ pub fn eval(node: Node) -> ShResult<()> {
 
 #[cfg(test)]
 mod tests {
-  use crate::state::{self, read_vars, write_vars, VarFlags, VarKind};
+  use crate::state::{self, VarFlags, VarKind, read_vars, write_vars};
   use crate::testutil::{TestGuard, test_input};
 
   // ===================== Basic =====================
@@ -80,7 +80,8 @@ mod tests {
   #[test]
   fn eval_expands_variable() {
     let guard = TestGuard::new();
-    write_vars(|v| v.set_var("CMD", VarKind::Str("echo evaluated".into()), VarFlags::NONE)).unwrap();
+    write_vars(|v| v.set_var("CMD", VarKind::Str("echo evaluated".into()), VarFlags::NONE))
+      .unwrap();
 
     test_input("eval $CMD").unwrap();
     let out = guard.read_output();

src/builtin/exec.rs

@@ -62,7 +62,9 @@ mod tests {
   #[test]
   fn exec_nonexistent_command_fails() {
     let _g = TestGuard::new();
-    let result = test_input("exec _____________no_such_______command_xyz_____________hopefully______this_doesnt______exist_____somewhere_in___your______PATH__________________");
+    let result = test_input(
+      "exec _____________no_such_______command_xyz_____________hopefully______this_doesnt______exist_____somewhere_in___your______PATH__________________",
+    );
     assert!(result.is_err());
   }
 }

src/builtin/help.rs

@@ -0,0 +1,306 @@
+use std::{env, io::Write, path::Path};
+
+use ariadne::Span as ASpan;
+
+use crate::{
+  libsh::{
+    error::{ShErr, ShErrKind, ShResult},
+    guards::RawModeGuard,
+  },
+  parse::{
+    NdRule, Node,
+    execute::{exec_input, prepare_argv},
+    lex::{QuoteState, Span},
+  },
+  readline::{complete::ScoredCandidate, markers},
+  state,
+};
+
+const TAG_SEQ: &str = "\x1b[1;33m"; // bold yellow — searchable tags
+const REF_SEQ: &str = "\x1b[4;36m"; // underline cyan — cross-references
+const RESET_SEQ: &str = "\x1b[0m";
+const HEADER_SEQ: &str = "\x1b[1;35m"; // bold magenta — section headers
+const CODE_SEQ: &str = "\x1b[32m"; // green — inline code
+const KEYWORD_2_SEQ: &str = "\x1b[1;32m"; // bold green — {keyword}
+const KEYWORD_3_SEQ: &str = "\x1b[3;37m"; // italic white — [optional]
+
+pub fn help(node: Node) -> ShResult<()> {
+  let NdRule::Command {
+    assignments: _,
+    argv,
+  } = node.class
+  else {
+    unreachable!()
+  };
+
+  let mut argv = prepare_argv(argv)?.into_iter().peekable();
+  let help = argv.next().unwrap(); // drop 'help'
+
+  // Join all of the word-split arguments into a single string
+  // Preserve the span too
+  let (topic, span) = if argv.peek().is_none() {
+    ("help.txt".to_string(), help.1)
+  } else {
+    argv.fold((String::new(), Span::default()), |mut acc, arg| {
+      if acc.1 == Span::default() {
+        acc.1 = arg.1.clone();
+      } else {
+        let new_end = arg.1.end();
+        let start = acc.1.start();
+        acc.1.set_range(start..new_end);
+      }
+
+      if acc.0.is_empty() {
+        acc.0 = arg.0;
+      } else {
+        acc.0 = acc.0 + &format!(" {}", arg.0);
+      }
+      acc
+    })
+  };
+
+  let hpath = env::var("SHED_HPATH").unwrap_or_default();
+
+	// search for prefixes of help doc filenames
+  for path in hpath.split(':') {
+    let dir = Path::new(path);
+    let Ok(entries) = dir.read_dir() else { continue };
+    for entry in entries {
+      let Ok(entry) = entry else { continue };
+      let path = entry.path();
+      if !path.is_file() {
+        continue;
+      }
+      let stem = path.file_stem().unwrap().to_string_lossy();
+      if stem.starts_with(&topic) {
+        let Ok(contents) = std::fs::read_to_string(&path) else {
+          continue;
+        };
+
+        let unescaped = unescape_help(&contents);
+        let expanded = expand_help(&unescaped);
+        open_help(&expanded, None, Some(stem.into_owned()))?;
+        state::set_status(0);
+        return Ok(());
+      }
+    }
+  }
+
+  // didn't find a filename match, its probably a tag search
+  for path in hpath.split(':') {
+    let path = Path::new(path);
+    if let Ok(entries) = path.read_dir() {
+      for entry in entries {
+        let Ok(entry) = entry else { continue };
+        let path = entry.path();
+        let filename = path.file_stem().unwrap().to_string_lossy().to_string();
+
+        if !path.is_file() {
+          continue;
+        }
+
+        let Ok(contents) = std::fs::read_to_string(&path) else {
+          continue;
+        };
+
+        let unescaped = unescape_help(&contents);
+        let expanded = expand_help(&unescaped);
+        let tags = read_tags(&expanded);
+
+        for (_tag, _line) in &tags {}
+
+        if let Some((_matched_tag, line)) = get_best_match(&topic, &tags) {
+          open_help(&expanded, Some(line), Some(filename))?;
+          state::set_status(0);
+          return Ok(());
+        }
+      }
+    }
+  }
+
+  state::set_status(1);
+  Err(ShErr::at(
+    ShErrKind::NotFound,
+    span,
+    "No relevant help page found for this topic",
+  ))
+}
+
+pub fn open_help(content: &str, line: Option<usize>, file_name: Option<String>) -> ShResult<()> {
+  let pager = env::var("SHED_HPAGER").unwrap_or(env::var("PAGER").unwrap_or("less -R".into()));
+  let line_arg = line.map(|ln| format!("+{ln}")).unwrap_or_default();
+  let prompt_arg = file_name
+    .map(|name| format!("-Ps'{name}'"))
+    .unwrap_or_default();
+
+  let mut tmp = tempfile::NamedTempFile::new()?;
+  let tmp_path = tmp.path().to_string_lossy().to_string();
+  tmp.write_all(content.as_bytes())?;
+  tmp.flush()?;
+
+  RawModeGuard::with_cooked_mode(|| {
+    exec_input(
+      format!("{pager} {line_arg} {prompt_arg} {tmp_path}"),
+      None,
+      true,
+      Some("help".into()),
+    )
+  })
+}
+
+pub fn get_best_match(topic: &str, tags: &[(String, usize)]) -> Option<(String, usize)> {
+  let mut candidates: Vec<_> = tags
+    .iter()
+    .map(|(tag, line)| (ScoredCandidate::new(tag.to_string()), *line))
+    .collect();
+
+  for (cand, _) in candidates.iter_mut() {
+    cand.fuzzy_score(topic);
+  }
+
+  candidates.retain(|(c, _)| c.score.unwrap_or(i32::MIN) > i32::MIN);
+  candidates.sort_by_key(|(c, _)| c.score.unwrap_or(i32::MIN));
+
+  candidates
+    .first()
+    .map(|(c, line)| (c.content.clone(), *line))
+}
+
+pub fn read_tags(raw: &str) -> Vec<(String, usize)> {
+  let mut tags = vec![];
+
+  for (line_num, line) in raw.lines().enumerate() {
+    let mut rest = line;
+
+    while let Some(pos) = rest.find(TAG_SEQ) {
+      let after_seq = &rest[pos + TAG_SEQ.len()..];
+      if let Some(end) = after_seq.find(RESET_SEQ) {
+        let tag = &after_seq[..end];
+        tags.push((tag.to_string(), line_num + 1));
+        rest = &after_seq[end + RESET_SEQ.len()..];
+      } else {
+        break;
+      }
+    }
+  }
+
+  tags
+}
+
+pub fn expand_help(raw: &str) -> String {
+  let mut result = String::new();
+  let mut chars = raw.chars();
+
+  while let Some(ch) = chars.next() {
+    match ch {
+      markers::RESET => result.push_str(RESET_SEQ),
+      markers::TAG => result.push_str(TAG_SEQ),
+      markers::REFERENCE => result.push_str(REF_SEQ),
+      markers::HEADER => result.push_str(HEADER_SEQ),
+      markers::CODE => result.push_str(CODE_SEQ),
+      markers::KEYWORD_2 => result.push_str(KEYWORD_2_SEQ),
+      markers::KEYWORD_3 => result.push_str(KEYWORD_3_SEQ),
+      _ => result.push(ch),
+    }
+  }
+  result
+}
+
+pub fn unescape_help(raw: &str) -> String {
+  let mut result = String::new();
+  let mut chars = raw.chars().peekable();
+  let mut qt_state = QuoteState::default();
+
+  while let Some(ch) = chars.next() {
+    match ch {
+      '\\' => {
+        if let Some(next_ch) = chars.next() {
+          result.push(next_ch);
+        }
+      }
+      '\n' => {
+        result.push(ch);
+        qt_state = QuoteState::default();
+      }
+      '"' => {
+        result.push(ch);
+        qt_state.toggle_double();
+      }
+      '\'' => {
+        result.push(ch);
+        qt_state.toggle_single();
+      }
+      _ if qt_state.in_quote() || chars.peek().is_none_or(|ch| ch.is_whitespace()) => {
+        result.push(ch);
+      }
+      '*' => {
+        result.push(markers::TAG);
+        while let Some(next_ch) = chars.next() {
+          if next_ch == '*' {
+            result.push(markers::RESET);
+            break;
+          } else {
+            result.push(next_ch);
+          }
+        }
+      }
+      '|' => {
+        result.push(markers::REFERENCE);
+        while let Some(next_ch) = chars.next() {
+          if next_ch == '|' {
+            result.push(markers::RESET);
+            break;
+          } else {
+            result.push(next_ch);
+          }
+        }
+      }
+      '#' => {
+        result.push(markers::HEADER);
+        while let Some(next_ch) = chars.next() {
+          if next_ch == '#' {
+            result.push(markers::RESET);
+            break;
+          } else {
+            result.push(next_ch);
+          }
+        }
+      }
+      '`' => {
+        result.push(markers::CODE);
+        while let Some(next_ch) = chars.next() {
+          if next_ch == '`' {
+            result.push(markers::RESET);
+            break;
+          } else {
+            result.push(next_ch);
+          }
+        }
+      }
+      '{' => {
+        result.push(markers::KEYWORD_2);
+        while let Some(next_ch) = chars.next() {
+          if next_ch == '}' {
+            result.push(markers::RESET);
+            break;
+          } else {
+            result.push(next_ch);
+          }
+        }
+      }
+      '[' => {
+        result.push(markers::KEYWORD_3);
+        while let Some(next_ch) = chars.next() {
+          if next_ch == ']' {
+            result.push(markers::RESET);
+            break;
+          } else {
+            result.push(next_ch);
+          }
+        }
+      }
+      _ => result.push(ch),
+    }
+  }
+  result
+}

src/builtin/keymap.rs

@@ -180,8 +180,8 @@ pub fn keymap(node: Node) -> ShResult<()> {
 #[cfg(test)]
 mod tests {
   use super::*;
-  use crate::getopt::Opt;
   use crate::expand::expand_keymap;
+  use crate::getopt::Opt;
   use crate::state::{self, read_logic};
   use crate::testutil::{TestGuard, test_input};
 
@@ -217,7 +217,8 @@ mod tests {
     let opts = KeyMapOpts::from_opts(&[
       Opt::Short('n'),
       Opt::LongWithArg("remove".into(), "jk".into()),
-    ]).unwrap();
+    ])
+    .unwrap();
     assert_eq!(opts.remove, Some("jk".into()));
   }
 
@@ -273,10 +274,7 @@ mod tests {
     let _g = TestGuard::new();
     test_input("keymap -n jk '<ESC>'").unwrap();
 
-    let maps = read_logic(|l| l.keymaps_filtered(
+    let maps = read_logic(|l| l.keymaps_filtered(KeyMapFlags::NORMAL, &expand_keymap("jk")));
-      KeyMapFlags::NORMAL,
-      &expand_keymap("jk"),
-    ));
     assert!(!maps.is_empty());
   }
 
@@ -285,10 +283,7 @@ mod tests {
     let _g = TestGuard::new();
     test_input("keymap -i jk '<ESC>'").unwrap();
 
-    let maps = read_logic(|l| l.keymaps_filtered(
+    let maps = read_logic(|l| l.keymaps_filtered(KeyMapFlags::INSERT, &expand_keymap("jk")));
-      KeyMapFlags::INSERT,
-      &expand_keymap("jk"),
-    ));
     assert!(!maps.is_empty());
   }
 
@@ -298,10 +293,7 @@ mod tests {
     test_input("keymap -n jk '<ESC>'").unwrap();
     test_input("keymap -n jk 'dd'").unwrap();
 
-    let maps = read_logic(|l| l.keymaps_filtered(
+    let maps = read_logic(|l| l.keymaps_filtered(KeyMapFlags::NORMAL, &expand_keymap("jk")));
-      KeyMapFlags::NORMAL,
-      &expand_keymap("jk"),
-    ));
     assert_eq!(maps.len(), 1);
     assert_eq!(maps[0].action, "dd");
   }
@@ -312,10 +304,7 @@ mod tests {
     test_input("keymap -n jk '<ESC>'").unwrap();
     test_input("keymap -n --remove jk").unwrap();
 
-    let maps = read_logic(|l| l.keymaps_filtered(
+    let maps = read_logic(|l| l.keymaps_filtered(KeyMapFlags::NORMAL, &expand_keymap("jk")));
-      KeyMapFlags::NORMAL,
-      &expand_keymap("jk"),
-    ));
     assert!(maps.is_empty());
   }
 

src/builtin/map.rs

@@ -389,7 +389,7 @@ pub fn get_map_opts(opts: Vec<Opt>) -> MapOpts {
 
 #[cfg(test)]
 mod tests {
-  use super::{MapNode, MapFlags, get_map_opts};
+  use super::{MapFlags, MapNode, get_map_opts};
   use crate::getopt::Opt;
   use crate::state::{self, read_vars};
   use crate::testutil::{TestGuard, test_input};
@@ -433,10 +433,7 @@ mod tests {
   #[test]
   fn mapnode_remove_nested() {
     let mut root = MapNode::default();
-    root.set(
+    root.set(&["a".into(), "b".into()], MapNode::StaticLeaf("val".into()));
-      &["a".into(), "b".into()],
-      MapNode::StaticLeaf("val".into()),
-    );
     root.remove(&["a".into(), "b".into()]);
     assert!(root.get(&["a".into(), "b".into()]).is_none());
     // Parent branch should still exist

src/builtin/mod.rs

@@ -11,26 +11,28 @@ pub mod eval;
 pub mod exec;
 pub mod flowctl;
 pub mod getopts;
+pub mod help;
 pub mod intro;
 pub mod jobctl;
 pub mod keymap;
 pub mod map;
 pub mod pwd;
 pub mod read;
+pub mod resource;
+pub mod seek;
 pub mod shift;
 pub mod shopt;
 pub mod source;
 pub mod test; // [[ ]] thing
 pub mod trap;
 pub mod varcmds;
-pub mod resource;
 
-pub const BUILTINS: [&str; 49] = [
+pub const BUILTINS: [&str; 51] = [
-  "echo", "cd", "read", "export", "local", "pwd", "source", ".", "shift", "jobs", "fg", "bg", "disown",
+  "echo", "cd", "read", "export", "local", "pwd", "source", ".", "shift", "jobs", "fg", "bg",
-  "alias", "unalias", "return", "break", "continue", "exit", "shopt", "builtin",
+  "disown", "alias", "unalias", "return", "break", "continue", "exit", "shopt", "builtin",
   "command", "trap", "pushd", "popd", "dirs", "exec", "eval", "true", "false", ":", "readonly",
   "unset", "complete", "compgen", "map", "pop", "fpop", "push", "fpush", "rotate", "wait", "type",
-  "getopts", "keymap", "read_key", "autocmd", "ulimit", "umask"
+  "getopts", "keymap", "read_key", "autocmd", "ulimit", "umask", "seek", "help",
 ];
 
 pub fn true_builtin() -> ShResult<()> {
@@ -50,7 +52,10 @@ pub fn noop_builtin() -> ShResult<()> {
 
 #[cfg(test)]
 pub mod tests {
-    use crate::{state, testutil::{TestGuard, test_input}};
+  use crate::{
+    state,
+    testutil::{TestGuard, test_input},
+  };
 
   // You can never be too sure!!!!!!
 

src/builtin/pwd.rs

@@ -27,10 +27,10 @@ pub fn pwd(node: Node) -> ShResult<()> {
 
 #[cfg(test)]
 mod tests {
-  use std::env;
-  use tempfile::TempDir;
   use crate::state;
   use crate::testutil::{TestGuard, test_input};
+  use std::env;
+  use tempfile::TempDir;
 
   #[test]
   fn pwd_prints_cwd() {

src/builtin/read.rs

@@ -367,7 +367,7 @@ pub fn get_read_key_opts(opts: Vec<Opt>) -> ShResult<ReadKeyOpts> {
 
 #[cfg(test)]
 mod tests {
-  use crate::state::{self, read_vars, write_vars, VarFlags, VarKind};
+  use crate::state::{self, VarFlags, VarKind, read_vars, write_vars};
   use crate::testutil::{TestGuard, test_input};
 
   // ===================== Basic read into REPLY =====================

src/builtin/resource.rs

@@ -1,11 +1,22 @@
 use ariadne::Fmt;
-use nix::{libc::STDOUT_FILENO, sys::{resource::{Resource, getrlimit, setrlimit}, stat::{Mode, umask}}, unistd::write};
+use nix::{
-
+  libc::STDOUT_FILENO,
-use crate::{
+  sys::{
-  getopt::{Opt, OptSpec, get_opts_from_tokens_strict}, libsh::error::{ShErr, ShErrKind, ShResult, ShResultExt, next_color}, parse::{NdRule, Node}, procio::borrow_fd, state::{self}
+    resource::{Resource, getrlimit, setrlimit},
+    stat::{Mode, umask},
+  },
+  unistd::write,
 };
 
-fn ulimit_opt_spec() -> [OptSpec;5] {
+use crate::{
+  getopt::{Opt, OptSpec, get_opts_from_tokens_strict},
+  libsh::error::{ShErr, ShErrKind, ShResult, ShResultExt, next_color},
+  parse::{NdRule, Node},
+  procio::borrow_fd,
+  state::{self},
+};
+
+fn ulimit_opt_spec() -> [OptSpec; 5] {
   [
     OptSpec {
       opt: Opt::Short('n'), // file descriptors
@@ -26,7 +37,7 @@ fn ulimit_opt_spec() -> [OptSpec;5] {
     OptSpec {
       opt: Opt::Short('v'), // virtual memory
       takes_arg: true,
-		}
+    },
   ]
 }
 
@@ -50,39 +61,51 @@ fn get_ulimit_opts(opt: &[Opt]) -> ShResult<UlimitOpts> {
   for o in opt {
     match o {
       Opt::ShortWithArg('n', arg) => {
-				opts.fds = Some(arg.parse().map_err(|_| ShErr::simple(
+        opts.fds = Some(arg.parse().map_err(|_| {
+          ShErr::simple(
             ShErrKind::ParseErr,
             format!("invalid argument for -n: {}", arg.fg(next_color())),
-				))?);
+          )
-			},
+        })?);
+      }
       Opt::ShortWithArg('u', arg) => {
-				opts.procs = Some(arg.parse().map_err(|_| ShErr::simple(
+        opts.procs = Some(arg.parse().map_err(|_| {
+          ShErr::simple(
             ShErrKind::ParseErr,
             format!("invalid argument for -u: {}", arg.fg(next_color())),
-				))?);
+          )
-			},
+        })?);
+      }
       Opt::ShortWithArg('s', arg) => {
-				opts.stack = Some(arg.parse().map_err(|_| ShErr::simple(
+        opts.stack = Some(arg.parse().map_err(|_| {
+          ShErr::simple(
             ShErrKind::ParseErr,
             format!("invalid argument for -s: {}", arg.fg(next_color())),
-				))?);
+          )
-			},
+        })?);
+      }
       Opt::ShortWithArg('c', arg) => {
-				opts.core = Some(arg.parse().map_err(|_| ShErr::simple(
+        opts.core = Some(arg.parse().map_err(|_| {
+          ShErr::simple(
             ShErrKind::ParseErr,
             format!("invalid argument for -c: {}", arg.fg(next_color())),
-				))?);
+          )
-			},
+        })?);
+      }
       Opt::ShortWithArg('v', arg) => {
-				opts.vmem = Some(arg.parse().map_err(|_| ShErr::simple(
+        opts.vmem = Some(arg.parse().map_err(|_| {
+          ShErr::simple(
             ShErrKind::ParseErr,
             format!("invalid argument for -v: {}", arg.fg(next_color())),
-				))?);
+          )
-			},
+        })?);
-			o => return Err(ShErr::simple(
+      }
+      o => {
+        return Err(ShErr::simple(
           ShErrKind::ParseErr,
           format!("invalid option: {}", o.fg(next_color())),
-			)),
+        ));
+      }
     }
   }
 
@@ -99,68 +122,89 @@ pub fn ulimit(node: Node) -> ShResult<()> {
     unreachable!()
   };
 
-	let (_, opts) = get_opts_from_tokens_strict(argv, &ulimit_opt_spec()).promote_err(span.clone())?;
+  let (_, opts) =
+    get_opts_from_tokens_strict(argv, &ulimit_opt_spec()).promote_err(span.clone())?;
   let ulimit_opts = get_ulimit_opts(&opts).promote_err(span.clone())?;
 
   if let Some(fds) = ulimit_opts.fds {
-		let (_, hard) =  getrlimit(Resource::RLIMIT_NOFILE).map_err(|e| ShErr::at(
+    let (_, hard) = getrlimit(Resource::RLIMIT_NOFILE).map_err(|e| {
+      ShErr::at(
         ShErrKind::ExecFail,
         span.clone(),
         format!("failed to get file descriptor limit: {}", e),
-		))?;
+      )
-		setrlimit(Resource::RLIMIT_NOFILE, fds, hard).map_err(|e| ShErr::at(
+    })?;
+    setrlimit(Resource::RLIMIT_NOFILE, fds, hard).map_err(|e| {
+      ShErr::at(
         ShErrKind::ExecFail,
         span.clone(),
         format!("failed to set file descriptor limit: {}", e),
-		))?;
+      )
+    })?;
   }
   if let Some(procs) = ulimit_opts.procs {
-		let (_, hard) =  getrlimit(Resource::RLIMIT_NPROC).map_err(|e| ShErr::at(
+    let (_, hard) = getrlimit(Resource::RLIMIT_NPROC).map_err(|e| {
+      ShErr::at(
         ShErrKind::ExecFail,
         span.clone(),
         format!("failed to get process limit: {}", e),
-		))?;
+      )
-		setrlimit(Resource::RLIMIT_NPROC, procs, hard).map_err(|e| ShErr::at(
+    })?;
+    setrlimit(Resource::RLIMIT_NPROC, procs, hard).map_err(|e| {
+      ShErr::at(
         ShErrKind::ExecFail,
         span.clone(),
         format!("failed to set process limit: {}", e),
-		))?;
+      )
+    })?;
   }
   if let Some(stack) = ulimit_opts.stack {
-		let (_, hard) =  getrlimit(Resource::RLIMIT_STACK).map_err(|e| ShErr::at(
+    let (_, hard) = getrlimit(Resource::RLIMIT_STACK).map_err(|e| {
+      ShErr::at(
         ShErrKind::ExecFail,
         span.clone(),
         format!("failed to get stack size limit: {}", e),
-		))?;
+      )
-		setrlimit(Resource::RLIMIT_STACK, stack, hard).map_err(|e| ShErr::at(
+    })?;
+    setrlimit(Resource::RLIMIT_STACK, stack, hard).map_err(|e| {
+      ShErr::at(
         ShErrKind::ExecFail,
         span.clone(),
         format!("failed to set stack size limit: {}", e),
-		))?;
+      )
+    })?;
   }
   if let Some(core) = ulimit_opts.core {
-		let (_, hard) =  getrlimit(Resource::RLIMIT_CORE).map_err(|e| ShErr::at(
+    let (_, hard) = getrlimit(Resource::RLIMIT_CORE).map_err(|e| {
+      ShErr::at(
         ShErrKind::ExecFail,
         span.clone(),
         format!("failed to get core dump size limit: {}", e),
-		))?;
+      )
-		setrlimit(Resource::RLIMIT_CORE, core, hard).map_err(|e| ShErr::at(
+    })?;
+    setrlimit(Resource::RLIMIT_CORE, core, hard).map_err(|e| {
+      ShErr::at(
         ShErrKind::ExecFail,
         span.clone(),
         format!("failed to set core dump size limit: {}", e),
-		))?;
+      )
+    })?;
   }
   if let Some(vmem) = ulimit_opts.vmem {
-		let (_, hard) =  getrlimit(Resource::RLIMIT_AS).map_err(|e| ShErr::at(
+    let (_, hard) = getrlimit(Resource::RLIMIT_AS).map_err(|e| {
+      ShErr::at(
         ShErrKind::ExecFail,
         span.clone(),
         format!("failed to get virtual memory limit: {}", e),
-		))?;
+      )
-		setrlimit(Resource::RLIMIT_AS, vmem, hard).map_err(|e| ShErr::at(
+    })?;
+    setrlimit(Resource::RLIMIT_AS, vmem, hard).map_err(|e| {
+      ShErr::at(
         ShErrKind::ExecFail,
         span.clone(),
         format!("failed to set virtual memory limit: {}", e),
-		))?;
+      )
+    })?;
   }
 
   state::set_status(0);
@@ -172,11 +216,17 @@ pub fn umask_builtin(node: Node) -> ShResult<()> {
   let NdRule::Command {
     assignments: _,
     argv,
-	} = node.class else {	unreachable!() };
+  } = node.class
+  else {
+    unreachable!()
+  };
 
   let (argv, opts) = get_opts_from_tokens_strict(
     argv,
-		&[OptSpec { opt: Opt::Short('S'), takes_arg: false }],
+    &[OptSpec {
+      opt: Opt::Short('S'),
+      takes_arg: false,
+    }],
   )?;
   let argv = &argv[1..]; // skip command name
 
@@ -195,24 +245,28 @@ pub fn umask_builtin(node: Node) -> ShResult<()> {
     let arg = argv[0].clone();
     let raw = arg.as_str();
     if raw.chars().any(|c| c.is_ascii_digit()) {
-			let mode_raw = u32::from_str_radix(raw, 8).map_err(|_| ShErr::at(
+      let mode_raw = u32::from_str_radix(raw, 8).map_err(|_| {
+        ShErr::at(
           ShErrKind::ParseErr,
           span.clone(),
           format!("invalid numeric umask: {}", raw.fg(next_color())),
-			))?;
+        )
+      })?;
 
-			let mode = Mode::from_bits(mode_raw).ok_or_else(|| ShErr::at(
+      let mode = Mode::from_bits(mode_raw).ok_or_else(|| {
+        ShErr::at(
           ShErrKind::ParseErr,
           span.clone(),
           format!("invalid umask value: {}", raw.fg(next_color())),
-			))?;
+        )
+      })?;
 
       umask(mode);
     } else {
       let parts = raw.split(',');
 
       for part in parts {
-				if let Some((who,bits)) = part.split_once('=') {
+        if let Some((who, bits)) = part.split_once('=') {
           let mut new_bits = 0;
           if bits.contains('r') {
             new_bits |= 4;
@@ -253,7 +307,7 @@ pub fn umask_builtin(node: Node) -> ShResult<()> {
           }
 
           umask(Mode::from_bits_truncate(old_bits));
-				} else if let Some((who,bits)) = part.split_once('+') {
+        } else if let Some((who, bits)) = part.split_once('+') {
           let mut new_bits = 0;
           if bits.contains('r') {
             new_bits |= 4;
@@ -291,7 +345,7 @@ pub fn umask_builtin(node: Node) -> ShResult<()> {
           }
 
           umask(Mode::from_bits_truncate(old_bits));
-				} else if let Some((who,bits)) = part.split_once('-') {
+        } else if let Some((who, bits)) = part.split_once('-') {
           let mut new_bits = 0;
           if bits.contains('r') {
             new_bits |= 4;
@@ -337,7 +391,6 @@ pub fn umask_builtin(node: Node) -> ShResult<()> {
         }
       }
     }
-
   } else if !opts.is_empty() {
     let u = (old_bits >> 6) & 0o7;
     let g = (old_bits >> 3) & 0o7;
@@ -345,11 +398,7 @@ pub fn umask_builtin(node: Node) -> ShResult<()> {
     let mut u_str = String::from("u=");
     let mut g_str = String::from("g=");
     let mut o_str = String::from("o=");
-		let stuff = [
+    let stuff = [(u, &mut u_str), (g, &mut g_str), (o, &mut o_str)];
-			(u, &mut u_str),
-			(g, &mut g_str),
-			(o, &mut o_str),
-		];
     for (bits, out) in stuff.into_iter() {
       if bits & 4 == 0 {
         out.push('r');
@@ -362,7 +411,7 @@ pub fn umask_builtin(node: Node) -> ShResult<()> {
       }
     }
 
-		let msg = [u_str,g_str,o_str].join(",");
+    let msg = [u_str, g_str, o_str].join(",");
     let stdout = borrow_fd(STDOUT_FILENO);
     write(stdout, msg.as_bytes())?;
     write(stdout, b"\n")?;
@@ -423,7 +472,8 @@ mod tests {
     let opts = get_ulimit_opts(&[
       Opt::ShortWithArg('n', "256".into()),
       Opt::ShortWithArg('c', "0".into()),
-    ]).unwrap();
+    ])
+    .unwrap();
     assert_eq!(opts.fds, Some(256));
     assert_eq!(opts.core, Some(0));
     assert!(opts.procs.is_none());

src/builtin/seek.rs

@@ -0,0 +1,263 @@
+use nix::{
+  libc::STDOUT_FILENO,
+  unistd::{Whence, lseek, write},
+};
+
+use crate::{
+  getopt::{Opt, OptSpec, get_opts_from_tokens},
+  libsh::error::{ShErr, ShErrKind, ShResult},
+  parse::{NdRule, Node, execute::prepare_argv},
+  procio::borrow_fd,
+  state,
+};
+
+pub const LSEEK_OPTS: [OptSpec; 2] = [
+  OptSpec {
+    opt: Opt::Short('c'),
+    takes_arg: false,
+  },
+  OptSpec {
+    opt: Opt::Short('e'),
+    takes_arg: false,
+  },
+];
+
+pub struct LseekOpts {
+  cursor_rel: bool,
+  end_rel: bool,
+}
+
+pub fn seek(node: Node) -> ShResult<()> {
+  let NdRule::Command {
+    assignments: _,
+    argv,
+  } = node.class
+  else {
+    unreachable!()
+  };
+
+  let (argv, opts) = get_opts_from_tokens(argv, &LSEEK_OPTS)?;
+  let lseek_opts = get_lseek_opts(opts)?;
+  let mut argv = prepare_argv(argv)?.into_iter();
+  argv.next(); // drop 'seek'
+
+  let Some(fd) = argv.next() else {
+    return Err(ShErr::simple(
+      ShErrKind::ExecFail,
+      "lseek: Missing required argument 'fd'",
+    ));
+  };
+  let Ok(fd) = fd.0.parse::<u32>() else {
+    return Err(
+      ShErr::at(ShErrKind::ExecFail, fd.1, "Invalid file descriptor")
+        .with_note("file descriptors are integers"),
+    );
+  };
+
+  let Some(offset) = argv.next() else {
+    return Err(ShErr::simple(
+      ShErrKind::ExecFail,
+      "lseek: Missing required argument 'offset'",
+    ));
+  };
+  let Ok(offset) = offset.0.parse::<i64>() else {
+    return Err(
+      ShErr::at(ShErrKind::ExecFail, offset.1, "Invalid offset")
+        .with_note("offset can be a positive or negative integer"),
+    );
+  };
+
+  let whence = if lseek_opts.cursor_rel {
+    Whence::SeekCur
+  } else if lseek_opts.end_rel {
+    Whence::SeekEnd
+  } else {
+    Whence::SeekSet
+  };
+
+  match lseek(fd as i32, offset, whence) {
+    Ok(new_offset) => {
+      let stdout = borrow_fd(STDOUT_FILENO);
+      let buf = new_offset.to_string() + "\n";
+      write(stdout, buf.as_bytes())?;
+    }
+    Err(e) => {
+      state::set_status(1);
+      return Err(e.into());
+    }
+  }
+
+  state::set_status(0);
+  Ok(())
+}
+
+pub fn get_lseek_opts(opts: Vec<Opt>) -> ShResult<LseekOpts> {
+  let mut lseek_opts = LseekOpts {
+    cursor_rel: false,
+    end_rel: false,
+  };
+
+  for opt in opts {
+    match opt {
+      Opt::Short('c') => lseek_opts.cursor_rel = true,
+      Opt::Short('e') => lseek_opts.end_rel = true,
+      _ => {
+        return Err(ShErr::simple(
+          ShErrKind::ExecFail,
+          format!("lseek: Unexpected flag '{opt}'"),
+        ));
+      }
+    }
+  }
+
+  Ok(lseek_opts)
+}
+
+#[cfg(test)]
+mod tests {
+  use crate::testutil::{TestGuard, test_input};
+  use pretty_assertions::assert_eq;
+
+  #[test]
+  fn seek_set_beginning() {
+    let dir = tempfile::TempDir::new().unwrap();
+    let path = dir.path().join("seek.txt");
+    std::fs::write(&path, "hello world\n").unwrap();
+    let g = TestGuard::new();
+
+    test_input(format!("exec 9<> {}", path.display())).unwrap();
+    test_input("seek 9 0").unwrap();
+
+    let out = g.read_output();
+    assert_eq!(out, "0\n");
+  }
+
+  #[test]
+  fn seek_set_offset() {
+    let dir = tempfile::TempDir::new().unwrap();
+    let path = dir.path().join("seek.txt");
+    std::fs::write(&path, "hello world\n").unwrap();
+    let g = TestGuard::new();
+
+    test_input(format!("exec 9<> {}", path.display())).unwrap();
+    test_input("seek 9 6").unwrap();
+
+    let out = g.read_output();
+    assert_eq!(out, "6\n");
+  }
+
+  #[test]
+  fn seek_then_read() {
+    let dir = tempfile::TempDir::new().unwrap();
+    let path = dir.path().join("seek.txt");
+    std::fs::write(&path, "hello world\n").unwrap();
+    let g = TestGuard::new();
+
+    test_input(format!("exec 9<> {}", path.display())).unwrap();
+    test_input("seek 9 6").unwrap();
+    // Clear the seek output
+    g.read_output();
+
+    test_input("read line <&9").unwrap();
+    let val = crate::state::read_vars(|v| v.get_var("line"));
+    assert_eq!(val, "world");
+  }
+
+  #[test]
+  fn seek_cur_relative() {
+    let dir = tempfile::TempDir::new().unwrap();
+    let path = dir.path().join("seek.txt");
+    std::fs::write(&path, "abcdefghij\n").unwrap();
+    let g = TestGuard::new();
+
+    test_input(format!("exec 9<> {}", path.display())).unwrap();
+    test_input("seek 9 3").unwrap();
+    test_input("seek -c 9 4").unwrap();
+
+    let out = g.read_output();
+    assert_eq!(out, "3\n7\n");
+  }
+
+  #[test]
+  fn seek_end() {
+    let dir = tempfile::TempDir::new().unwrap();
+    let path = dir.path().join("seek.txt");
+    std::fs::write(&path, "hello\n").unwrap(); // 6 bytes
+    let g = TestGuard::new();
+
+    test_input(format!("exec 9<> {}", path.display())).unwrap();
+    test_input("seek -e 9 0").unwrap();
+
+    let out = g.read_output();
+    assert_eq!(out, "6\n");
+  }
+
+  #[test]
+  fn seek_end_negative() {
+    let dir = tempfile::TempDir::new().unwrap();
+    let path = dir.path().join("seek.txt");
+    std::fs::write(&path, "hello\n").unwrap(); // 6 bytes
+    let g = TestGuard::new();
+
+    test_input(format!("exec 9<> {}", path.display())).unwrap();
+    test_input("seek -e 9 -2").unwrap();
+
+    let out = g.read_output();
+    assert_eq!(out, "4\n");
+  }
+
+  #[test]
+  fn seek_write_overwrite() {
+    let dir = tempfile::TempDir::new().unwrap();
+    let path = dir.path().join("seek.txt");
+    std::fs::write(&path, "hello world\n").unwrap();
+    let _g = TestGuard::new();
+
+    test_input(format!("exec 9<> {}", path.display())).unwrap();
+    test_input("seek 9 6").unwrap();
+    test_input("echo -n 'WORLD' >&9").unwrap();
+
+    let contents = std::fs::read_to_string(&path).unwrap();
+    assert_eq!(contents, "hello WORLD\n");
+  }
+
+  #[test]
+  fn seek_rewind_full_read() {
+    let dir = tempfile::TempDir::new().unwrap();
+    let path = dir.path().join("seek.txt");
+    std::fs::write(&path, "abc\n").unwrap();
+    let g = TestGuard::new();
+
+    test_input(format!("exec 9<> {}", path.display())).unwrap();
+    // Read moves cursor to EOF
+    test_input("read line <&9").unwrap();
+    // Rewind
+    test_input("seek 9 0").unwrap();
+    // Clear output from seek
+    g.read_output();
+    // Read again from beginning
+    test_input("read line <&9").unwrap();
+
+    let val = crate::state::read_vars(|v| v.get_var("line"));
+    assert_eq!(val, "abc");
+  }
+
+  #[test]
+  fn seek_bad_fd() {
+    let _g = TestGuard::new();
+
+    let result = test_input("seek 99 0");
+    assert!(result.is_err());
+  }
+
+  #[test]
+  fn seek_missing_args() {
+    let _g = TestGuard::new();
+
+    let result = test_input("seek");
+    assert!(result.is_err());
+
+    let result = test_input("seek 9");
+    assert!(result.is_err());
+  }
+}

src/builtin/shopt.rs

@@ -32,7 +32,7 @@ pub fn shopt(node: Node) -> ShResult<()> {
   }
 
   for (arg, span) in argv {
-    let Some(mut output) = write_shopts(|s| s.query(&arg)).blame(span)? else {
+    let Some(mut output) = write_shopts(|s| s.query(&arg)).promote_err(span)? else {
       continue;
     };
 
@@ -61,7 +61,7 @@ mod tests {
     assert!(out.contains("dotglob"));
     assert!(out.contains("autocd"));
     assert!(out.contains("max_hist"));
-    assert!(out.contains("edit_mode"));
+    assert!(out.contains("comp_limit"));
   }
 
   #[test]
@@ -72,7 +72,7 @@ mod tests {
     assert!(out.contains("dotglob"));
     assert!(out.contains("autocd"));
     // Should not contain prompt opts
-    assert!(!out.contains("edit_mode"));
+    assert!(!out.contains("comp_limit"));
   }
 
   #[test]
@@ -107,11 +107,10 @@ mod tests {
   }
 
   #[test]
-  fn shopt_set_edit_mode() {
+  fn shopt_set_completion_ignore_case() {
     let _g = TestGuard::new();
-    test_input("shopt prompt.edit_mode=emacs").unwrap();
+    test_input("shopt prompt.completion_ignore_case=true").unwrap();
-    let mode = read_shopts(|o| format!("{}", o.prompt.edit_mode));
+    assert!(read_shopts(|o| o.prompt.completion_ignore_case));
-    assert_eq!(mode, "emacs");
   }
 
   // ===================== Error cases =====================

src/builtin/source.rs

@@ -46,9 +46,9 @@ pub fn source(node: Node) -> ShResult<()> {
 pub mod tests {
   use std::io::Write;
 
-    use tempfile::{NamedTempFile, TempDir};
   use crate::state::{self, read_logic, read_vars};
   use crate::testutil::{TestGuard, test_input};
+  use tempfile::{NamedTempFile, TempDir};
 
   #[test]
   fn source_simple() {

src/builtin/test.rs

@@ -94,7 +94,10 @@ impl FromStr for TestOp {
       "-ge" => Ok(Self::IntGe),
       "-le" => Ok(Self::IntLe),
       _ if TEST_UNARY_OPS.contains(&s) => Ok(Self::Unary(s.parse::<UnaryOp>()?)),
-      _ => Err(ShErr::simple(ShErrKind::SyntaxErr, format!("Invalid test operator '{}'", s))),
+      _ => Err(ShErr::simple(
+        ShErrKind::SyntaxErr,
+        format!("Invalid test operator '{}'", s),
+      )),
     }
   }
 }
@@ -305,10 +308,10 @@ pub fn double_bracket_test(node: Node) -> ShResult<bool> {
 
 #[cfg(test)]
 mod tests {
-  use std::fs;
-  use tempfile::{TempDir, NamedTempFile};
   use crate::state;
   use crate::testutil::{TestGuard, test_input};
+  use std::fs;
+  use tempfile::{NamedTempFile, TempDir};
 
   // ===================== Unary: file tests =====================
 
@@ -590,9 +593,10 @@ mod tests {
   fn parse_unary_ops() {
     use super::UnaryOp;
     use std::str::FromStr;
-    for op in ["-e", "-d", "-f", "-h", "-L", "-r", "-w", "-x", "-s",
+    for op in [
-               "-p", "-S", "-b", "-c", "-k", "-O", "-G", "-N", "-u",
+      "-e", "-d", "-f", "-h", "-L", "-r", "-w", "-x", "-s", "-p", "-S", "-b", "-c", "-k", "-O",
-               "-g", "-t", "-n", "-z"] {
+      "-G", "-N", "-u", "-g", "-t", "-n", "-z",
+    ] {
       assert!(UnaryOp::from_str(op).is_ok(), "failed to parse {op}");
     }
   }

src/builtin/trap.rs

@@ -171,10 +171,10 @@ pub fn trap(node: Node) -> ShResult<()> {
 #[cfg(test)]
 mod tests {
   use super::TrapTarget;
-  use std::str::FromStr;
-  use nix::sys::signal::Signal;
   use crate::state::{self, read_logic};
   use crate::testutil::{TestGuard, test_input};
+  use nix::sys::signal::Signal;
+  use std::str::FromStr;
 
   // ===================== Pure: TrapTarget parsing =====================
 
@@ -231,7 +231,9 @@ mod tests {
 
   #[test]
   fn display_signal_roundtrip() {
-    for name in &["INT", "QUIT", "TERM", "USR1", "USR2", "ALRM", "CHLD", "WINCH"] {
+    for name in &[
+      "INT", "QUIT", "TERM", "USR1", "USR2", "ALRM", "CHLD", "WINCH",
+    ] {
       let target = TrapTarget::from_str(name).unwrap();
       assert_eq!(target.to_string(), *name);
     }

src/builtin/varcmds.rs

@@ -245,8 +245,16 @@ mod tests {
     test_input("readonly a=1 b=2").unwrap();
     assert_eq!(read_vars(|v| v.get_var("a")), "1");
     assert_eq!(read_vars(|v| v.get_var("b")), "2");
-    assert!(read_vars(|v| v.get_var_flags("a")).unwrap().contains(VarFlags::READONLY));
+    assert!(
-    assert!(read_vars(|v| v.get_var_flags("b")).unwrap().contains(VarFlags::READONLY));
+      read_vars(|v| v.get_var_flags("a"))
+        .unwrap()
+        .contains(VarFlags::READONLY)
+    );
+    assert!(
+      read_vars(|v| v.get_var_flags("b"))
+        .unwrap()
+        .contains(VarFlags::READONLY)
+    );
   }
 
   #[test]
@@ -385,7 +393,11 @@ mod tests {
     let _g = TestGuard::new();
     test_input("local mylocal").unwrap();
     assert_eq!(read_vars(|v| v.get_var("mylocal")), "");
-    assert!(read_vars(|v| v.get_var_flags("mylocal")).unwrap().contains(VarFlags::LOCAL));
+    assert!(
+      read_vars(|v| v.get_var_flags("mylocal"))
+        .unwrap()
+        .contains(VarFlags::LOCAL)
+    );
   }
 
   #[test]

src/expand.rs

@@ -4,6 +4,7 @@ use std::str::{Chars, FromStr};
 
 use ariadne::Fmt;
 use glob::Pattern;
+use nix::unistd::{Uid, User};
 use regex::Regex;
 
 use crate::libsh::error::{ShErr, ShErrKind, ShResult, ShResultExt, next_color};
@@ -40,18 +41,26 @@ impl Tk {
 }
 
 pub struct Expander {
+  flags: TkFlags,
   raw: String,
 }
 
 impl Expander {
   pub fn new(raw: Tk) -> ShResult<Self> {
-    let raw = raw.span.as_str();
+    let tk_raw = raw.span.as_str();
-    Self::from_raw(raw)
+    Self::from_raw(tk_raw, raw.flags)
   }
-  pub fn from_raw(raw: &str) -> ShResult<Self> {
+  pub fn from_raw(raw: &str, flags: TkFlags) -> ShResult<Self> {
     let raw = expand_braces_full(raw)?.join(" ");
-    let unescaped = unescape_str(&raw);
+    let unescaped = if flags.contains(TkFlags::IS_HEREDOC) {
-    Ok(Self { raw: unescaped })
+      unescape_heredoc(&raw)
+    } else {
+      unescape_str(&raw)
+    };
+    Ok(Self {
+      raw: unescaped,
+      flags,
+    })
   }
   pub fn expand(&mut self) -> ShResult<Vec<String>> {
     let mut chars = self.raw.chars().peekable();
@@ -75,8 +84,12 @@ impl Expander {
       self.raw.insert_str(0, "./");
     }
 
+    if self.flags.contains(TkFlags::IS_HEREDOC) {
+      Ok(vec![self.raw.clone()])
+    } else {
       Ok(self.split_words())
     }
+  }
   pub fn split_words(&mut self) -> Vec<String> {
     let mut words = vec![];
     let mut chars = self.raw.chars();
@@ -86,6 +99,11 @@ impl Expander {
 
     'outer: while let Some(ch) = chars.next() {
       match ch {
+        markers::ESCAPE => {
+          if let Some(next_ch) = chars.next() {
+            cur_word.push(next_ch);
+          }
+        }
         markers::DUB_QUOTE | markers::SNG_QUOTE | markers::SUBSH => {
           while let Some(q_ch) = chars.next() {
             match q_ch {
@@ -456,7 +474,32 @@ pub fn expand_raw(chars: &mut Peekable<Chars<'_>>) -> ShResult<String> {
   while let Some(ch) = chars.next() {
     match ch {
       markers::TILDE_SUB => {
-        let home = env::var("HOME").unwrap_or_default();
+        let mut username = String::new();
+        while chars.peek().is_some_and(|ch| *ch != '/') {
+          let ch = chars.next().unwrap();
+          username.push(ch);
+        }
+
+        let home = if username.is_empty() {
+          // standard '~' expansion
+          env::var("HOME").unwrap_or_default()
+        } else if let Ok(result) = User::from_name(&username)
+          && let Some(user) = result
+        {
+          // username expansion like '~user'
+          user.dir.to_string_lossy().to_string()
+        } else if let Ok(id) = username.parse::<u32>()
+          && let Ok(result) = User::from_uid(Uid::from_raw(id))
+          && let Some(user) = result
+        {
+          // uid expansion like '~1000'
+          // shed only feature btw B)
+          user.dir.to_string_lossy().to_string()
+        } else {
+          // no match, use literal
+          format!("~{username}")
+        };
+
         result.push_str(&home);
       }
       markers::PROC_SUB_OUT => {
@@ -634,8 +677,12 @@ pub fn expand_glob(raw: &str) -> ShResult<String> {
   {
     let entry =
       entry.map_err(|_| ShErr::simple(ShErrKind::SyntaxErr, "Invalid filename found in glob"))?;
+    let entry_raw = entry
+      .to_str()
+      .ok_or_else(|| ShErr::simple(ShErrKind::SyntaxErr, "Non-UTF8 filename found in glob"))?;
+    let escaped = escape_str(entry_raw, true);
 
-    words.push(entry.to_str().unwrap().to_string())
+    words.push(escaped)
   }
   Ok(words.join(" "))
 }
@@ -973,6 +1020,11 @@ pub fn expand_cmd_sub(raw: &str) -> ShResult<String> {
   }
 }
 
+/// Strip ESCAPE markers from a string, leaving the characters they protect intact.
+fn strip_escape_markers(s: &str) -> String {
+  s.replace(markers::ESCAPE, "")
+}
+
 /// Processes strings into intermediate representations that are more readable
 /// by the program
 ///
@@ -989,6 +1041,7 @@ pub fn unescape_str(raw: &str) -> String {
       '~' if first_char => result.push(markers::TILDE_SUB),
       '\\' => {
         if let Some(next_ch) = chars.next() {
+          result.push(markers::ESCAPE);
           result.push(next_ch)
         }
       }
@@ -1139,6 +1192,25 @@ pub fn unescape_str(raw: &str) -> String {
                 }
               }
             }
+            '`' => {
+              result.push(markers::VAR_SUB);
+              result.push(markers::SUBSH);
+              while let Some(bt_ch) = chars.next() {
+                match bt_ch {
+                  '\\' => {
+                    result.push(bt_ch);
+                    if let Some(next_ch) = chars.next() {
+                      result.push(next_ch);
+                    }
+                  }
+                  '`' => {
+                    result.push(markers::SUBSH);
+                    break;
+                  }
+                  _ => result.push(bt_ch),
+                }
+              }
+            }
             '"' => {
               result.push(markers::DUB_QUOTE);
               break;
@@ -1151,14 +1223,13 @@ pub fn unescape_str(raw: &str) -> String {
         result.push(markers::SNG_QUOTE);
         while let Some(q_ch) = chars.next() {
           match q_ch {
-            '\\' => {
+            '\\' => match chars.peek() {
-              if chars.peek() == Some(&'\'') {
+              Some(&'\\') | Some(&'\'') => {
-                result.push('\'');
+                let ch = chars.next().unwrap();
-                chars.next();
+                result.push(ch);
-              } else {
-                result.push('\\');
-              }
               }
+              _ => result.push(q_ch),
+            },
             '\'' => {
               result.push(markers::SNG_QUOTE);
               break;
@@ -1296,6 +1367,99 @@ pub fn unescape_str(raw: &str) -> String {
           }
         }
       }
+      '$' => {
+        if chars.peek() == Some(&'$') || chars.peek().is_none_or(|ch| ch.is_whitespace()) {
+          chars.next();
+          result.push('$');
+        } else {
+          result.push(markers::VAR_SUB);
+        }
+      }
+      '`' => {
+        result.push(markers::VAR_SUB);
+        result.push(markers::SUBSH);
+        while let Some(bt_ch) = chars.next() {
+          match bt_ch {
+            '\\' => {
+              result.push(bt_ch);
+              if let Some(next_ch) = chars.next() {
+                result.push(next_ch);
+              }
+            }
+            '`' => {
+              result.push(markers::SUBSH);
+              break;
+            }
+            _ => result.push(bt_ch),
+          }
+        }
+      }
+      _ => result.push(ch),
+    }
+    first_char = false;
+  }
+
+  result
+}
+
+/// Like unescape_str but for heredoc bodies. Only processes:
+/// - $var / ${var} / $(cmd) substitution markers
+/// - Backslash escapes (only before $, `, \, and newline)
+///
+/// Everything else (quotes, tildes, globs, process subs, etc.) is literal.
+pub fn unescape_heredoc(raw: &str) -> String {
+  let mut chars = raw.chars().peekable();
+  let mut result = String::new();
+
+  while let Some(ch) = chars.next() {
+    match ch {
+      '\\' => {
+        match chars.peek() {
+          Some('$') | Some('`') | Some('\\') | Some('\n') => {
+            let next_ch = chars.next().unwrap();
+            if next_ch == '\n' {
+              // line continuation — discard both backslash and newline
+              continue;
+            }
+            result.push(markers::ESCAPE);
+            result.push(next_ch);
+          }
+          _ => {
+            // backslash is literal
+            result.push('\\');
+          }
+        }
+      }
+      '$' if chars.peek() == Some(&'(') => {
+        result.push(markers::VAR_SUB);
+        chars.next(); // consume '('
+        result.push(markers::SUBSH);
+        let mut paren_count = 1;
+        while let Some(subsh_ch) = chars.next() {
+          match subsh_ch {
+            '\\' => {
+              result.push(subsh_ch);
+              if let Some(next_ch) = chars.next() {
+                result.push(next_ch);
+              }
+            }
+            '(' => {
+              paren_count += 1;
+              result.push(subsh_ch);
+            }
+            ')' => {
+              paren_count -= 1;
+              if paren_count == 0 {
+                result.push(markers::SUBSH);
+                break;
+              } else {
+                result.push(subsh_ch);
+              }
+            }
+            _ => result.push(subsh_ch),
+          }
+        }
+      }
       '$' => {
         result.push(markers::VAR_SUB);
         if chars.peek() == Some(&'$') {
@@ -1303,9 +1467,64 @@ pub fn unescape_str(raw: &str) -> String {
           result.push('$');
         }
       }
+      '`' => {
+        result.push(markers::VAR_SUB);
+        result.push(markers::SUBSH);
+        while let Some(bt_ch) = chars.next() {
+          match bt_ch {
+            '\\' => {
+              result.push(bt_ch);
+              if let Some(next_ch) = chars.next() {
+                result.push(next_ch);
+              }
+            }
+            '`' => {
+              result.push(markers::SUBSH);
+              break;
+            }
+            _ => result.push(bt_ch),
+          }
+        }
+      }
       _ => result.push(ch),
     }
-    first_char = false;
+  }
+
+  result
+}
+
+/// Opposite of unescape_str - escapes a string to be executed as literal text
+/// Used for completion results, and glob filename matches.
+pub fn escape_str(raw: &str, use_marker: bool) -> String {
+  let mut result = String::new();
+  let mut chars = raw.chars();
+
+  while let Some(ch) = chars.next() {
+    match ch {
+      '\'' | '"' | '\\' | '|' | '&' | ';' | '(' | ')' | '<' | '>' | '$' | '*' | '!' | '`' | '{'
+      | '?' | '[' | '#' | ' ' | '\t' | '\n' => {
+        if use_marker {
+          result.push(markers::ESCAPE);
+        } else {
+          result.push('\\');
+        }
+        result.push(ch);
+        continue;
+      }
+      '~' if result.is_empty() => {
+        if use_marker {
+          result.push(markers::ESCAPE);
+        } else {
+          result.push('\\');
+        }
+        result.push(ch);
+        continue;
+      }
+      _ => {
+        result.push(ch);
+        continue;
+      }
+    }
   }
 
   result
@@ -1364,6 +1583,10 @@ pub fn unescape_math(raw: &str) -> String {
 #[derive(Debug)]
 pub enum ParamExp {
   Len,                               // #var_name
+  ToUpperFirst,                      // ^var_name
+  ToUpperAll,                        // ^^var_name
+  ToLowerFirst,                      // ,var_name
+  ToLowerAll,                        // ,,var_name
   DefaultUnsetOrNull(String),        // :-
   DefaultUnset(String),              // -
   SetDefaultUnsetOrNull(String),     // :=
@@ -1399,6 +1622,19 @@ impl FromStr for ParamExp {
       ))
     };
 
+    if s == "^^" {
+      return Ok(ToUpperAll);
+    }
+    if s == "^" {
+      return Ok(ToUpperFirst);
+    }
+    if s == ",," {
+      return Ok(ToLowerAll);
+    }
+    if s == "," {
+      return Ok(ToLowerFirst);
+    }
+
     // Handle indirect var expansion: ${!var}
     if let Some(var) = s.strip_prefix('!') {
       if var.ends_with('*') || var.ends_with('@') {
@@ -1504,7 +1740,7 @@ pub fn perform_param_expansion(raw: &str) -> ShResult<String> {
 
   while let Some(ch) = chars.next() {
     match ch {
-      '!' | '#' | '%' | ':' | '-' | '+' | '=' | '/' | '?' => {
+      '!' | '#' | '%' | ':' | '-' | '+' | '^' | ',' | '=' | '/' | '?' => {
         rest.push(ch);
         rest.push_str(&chars.collect::<String>());
         break;
@@ -1516,6 +1752,32 @@ pub fn perform_param_expansion(raw: &str) -> ShResult<String> {
   if let Ok(expansion) = rest.parse::<ParamExp>() {
     match expansion {
       ParamExp::Len => unreachable!(),
+      ParamExp::ToUpperAll => {
+        let value = vars.get_var(&var_name);
+        Ok(value.to_uppercase())
+      }
+      ParamExp::ToUpperFirst => {
+        let value = vars.get_var(&var_name);
+        let mut chars = value.chars();
+        let first = chars
+          .next()
+          .map(|c| c.to_uppercase().to_string())
+          .unwrap_or_default();
+        Ok(first + chars.as_str())
+      }
+      ParamExp::ToLowerAll => {
+        let value = vars.get_var(&var_name);
+        Ok(value.to_lowercase())
+      }
+      ParamExp::ToLowerFirst => {
+        let value = vars.get_var(&var_name);
+        let mut chars = value.chars();
+        let first = chars
+          .next()
+          .map(|c| c.to_lowercase().to_string())
+          .unwrap_or_default();
+        Ok(first + chars.as_str())
+      }
       ParamExp::DefaultUnsetOrNull(default) => {
         match vars.try_get_var(&var_name).filter(|v| !v.is_empty()) {
           Some(val) => Ok(val),
@@ -1588,7 +1850,8 @@ pub fn perform_param_expansion(raw: &str) -> ShResult<String> {
       ParamExp::RemShortestPrefix(prefix) => {
         let value = vars.get_var(&var_name);
         let unescaped = unescape_str(&prefix);
-        let expanded = expand_raw(&mut unescaped.chars().peekable()).unwrap_or(prefix);
+        let expanded =
+          strip_escape_markers(&expand_raw(&mut unescaped.chars().peekable()).unwrap_or(prefix));
         let pattern = Pattern::new(&expanded).unwrap();
         for i in 0..=value.len() {
           let sliced = &value[..i];
@@ -1601,7 +1864,8 @@ pub fn perform_param_expansion(raw: &str) -> ShResult<String> {
       ParamExp::RemLongestPrefix(prefix) => {
         let value = vars.get_var(&var_name);
         let unescaped = unescape_str(&prefix);
-        let expanded = expand_raw(&mut unescaped.chars().peekable()).unwrap_or(prefix);
+        let expanded =
+          strip_escape_markers(&expand_raw(&mut unescaped.chars().peekable()).unwrap_or(prefix));
         let pattern = Pattern::new(&expanded).unwrap();
         for i in (0..=value.len()).rev() {
           let sliced = &value[..i];
@@ -1614,7 +1878,8 @@ pub fn perform_param_expansion(raw: &str) -> ShResult<String> {
       ParamExp::RemShortestSuffix(suffix) => {
         let value = vars.get_var(&var_name);
         let unescaped = unescape_str(&suffix);
-        let expanded = expand_raw(&mut unescaped.chars().peekable()).unwrap_or(suffix);
+        let expanded =
+          strip_escape_markers(&expand_raw(&mut unescaped.chars().peekable()).unwrap_or(suffix));
         let pattern = Pattern::new(&expanded).unwrap();
         for i in (0..=value.len()).rev() {
           let sliced = &value[i..];
@@ -1627,8 +1892,9 @@ pub fn perform_param_expansion(raw: &str) -> ShResult<String> {
       ParamExp::RemLongestSuffix(suffix) => {
         let value = vars.get_var(&var_name);
         let unescaped = unescape_str(&suffix);
-        let expanded_suffix =
+        let expanded_suffix = strip_escape_markers(
-          expand_raw(&mut unescaped.chars().peekable()).unwrap_or(suffix.clone());
+          &expand_raw(&mut unescaped.chars().peekable()).unwrap_or(suffix.clone()),
+        );
         let pattern = Pattern::new(&expanded_suffix).unwrap();
         for i in 0..=value.len() {
           let sliced = &value[i..];
@@ -1642,8 +1908,10 @@ pub fn perform_param_expansion(raw: &str) -> ShResult<String> {
         let value = vars.get_var(&var_name);
         let search = unescape_str(&search);
         let replace = unescape_str(&replace);
-        let expanded_search = expand_raw(&mut search.chars().peekable()).unwrap_or(search);
+        let expanded_search =
-        let expanded_replace = expand_raw(&mut replace.chars().peekable()).unwrap_or(replace);
+          strip_escape_markers(&expand_raw(&mut search.chars().peekable()).unwrap_or(search));
+        let expanded_replace =
+          strip_escape_markers(&expand_raw(&mut replace.chars().peekable()).unwrap_or(replace));
         let regex = glob_to_regex(&expanded_search, false); // unanchored pattern
 
         if let Some(mat) = regex.find(&value) {
@@ -1659,8 +1927,10 @@ pub fn perform_param_expansion(raw: &str) -> ShResult<String> {
         let value = vars.get_var(&var_name);
         let search = unescape_str(&search);
         let replace = unescape_str(&replace);
-        let expanded_search = expand_raw(&mut search.chars().peekable()).unwrap_or(search);
+        let expanded_search =
-        let expanded_replace = expand_raw(&mut replace.chars().peekable()).unwrap_or(replace);
+          strip_escape_markers(&expand_raw(&mut search.chars().peekable()).unwrap_or(search));
+        let expanded_replace =
+          strip_escape_markers(&expand_raw(&mut replace.chars().peekable()).unwrap_or(replace));
         let regex = glob_to_regex(&expanded_search, false);
         let mut result = String::new();
         let mut last_match_end = 0;
@@ -1679,8 +1949,10 @@ pub fn perform_param_expansion(raw: &str) -> ShResult<String> {
         let value = vars.get_var(&var_name);
         let search = unescape_str(&search);
         let replace = unescape_str(&replace);
-        let expanded_search = expand_raw(&mut search.chars().peekable()).unwrap_or(search);
+        let expanded_search =
-        let expanded_replace = expand_raw(&mut replace.chars().peekable()).unwrap_or(replace);
+          strip_escape_markers(&expand_raw(&mut search.chars().peekable()).unwrap_or(search));
+        let expanded_replace =
+          strip_escape_markers(&expand_raw(&mut replace.chars().peekable()).unwrap_or(replace));
         let pattern = Pattern::new(&expanded_search).unwrap();
         for i in (0..=value.len()).rev() {
           let sliced = &value[..i];
@@ -1694,8 +1966,10 @@ pub fn perform_param_expansion(raw: &str) -> ShResult<String> {
         let value = vars.get_var(&var_name);
         let search = unescape_str(&search);
         let replace = unescape_str(&replace);
-        let expanded_search = expand_raw(&mut search.chars().peekable()).unwrap_or(search);
+        let expanded_search =
-        let expanded_replace = expand_raw(&mut replace.chars().peekable()).unwrap_or(replace);
+          strip_escape_markers(&expand_raw(&mut search.chars().peekable()).unwrap_or(search));
+        let expanded_replace =
+          strip_escape_markers(&expand_raw(&mut replace.chars().peekable()).unwrap_or(replace));
         let pattern = Pattern::new(&expanded_search).unwrap();
         for i in (0..=value.len()).rev() {
           let sliced = &value[i..];
@@ -1740,6 +2014,11 @@ pub fn expand_case_pattern(raw: &str) -> ShResult<String> {
       markers::DUB_QUOTE | markers::SNG_QUOTE => {
         in_quote = !in_quote;
       }
+      markers::ESCAPE => {
+        if let Some(next_ch) = chars.next() {
+          result.push(next_ch);
+        }
+      }
       '*' | '?' | '[' | ']' if in_quote => {
         result.push('\\');
         result.push(ch);
@@ -1751,44 +2030,18 @@ pub fn expand_case_pattern(raw: &str) -> ShResult<String> {
 }
 
 pub fn glob_to_regex(glob: &str, anchored: bool) -> Regex {
-  let mut regex = String::new();
+  // fnmatch_regex always produces ^...$, so get the pattern string and strip if unanchored
-  if anchored {
+  let pattern = fnmatch_regex::glob_to_regex_pattern(glob)
-    regex.push('^');
+    .unwrap_or_else(|_| regex::escape(glob));
-  }
+  let pattern = if anchored {
-  let mut chars = glob.chars();
+    pattern
-  while let Some(ch) = chars.next() {
+  } else {
-    match ch {
+    pattern
-      '\\' => {
+      .strip_prefix('^').unwrap_or(&pattern)
-        // Shell escape: next char is literal
+      .strip_suffix('$').unwrap_or(&pattern)
-        if let Some(esc) = chars.next() {
+      .to_string()
-          // Some characters have special meaning after \ in regex
+  };
-          // (e.g. \< is word boundary), so use hex escape for safety
+  Regex::new(&pattern).unwrap()
-          regex.push_str(&format!("\\x{:02x}", esc as u32));
-        }
-      }
-      '*' => regex.push_str(".*"),
-      '?' => regex.push('.'),
-      '[' => {
-        // Pass through character class [...] as-is (glob and regex syntax match)
-        regex.push('[');
-        while let Some(bc) = chars.next() {
-          regex.push(bc);
-          if bc == ']' {
-            break;
-          }
-        }
-      }
-      '.' | '+' | '(' | ')' | '|' | '^' | '$' | '{' | '}' => {
-        regex.push('\\');
-        regex.push(ch);
-      }
-      _ => regex.push(ch),
-    }
-  }
-  if anchored {
-    regex.push('$');
-  }
-  Regex::new(&regex).unwrap()
 }
 
 #[derive(Debug)]
@@ -2381,11 +2634,11 @@ pub fn parse_key_alias(alias: &str) -> Option<KeyEvent> {
 #[cfg(test)]
 mod tests {
   use super::*;
-  use std::time::Duration;
-  use crate::readline::keys::{KeyCode, KeyEvent, ModKeys};
-  use crate::state::{write_vars, read_vars, ArrIndex, VarKind, VarFlags};
   use crate::parse::lex::Span;
+  use crate::readline::keys::{KeyCode, KeyEvent, ModKeys};
+  use crate::state::{ArrIndex, VarFlags, VarKind, read_vars, write_vars};
   use crate::testutil::{TestGuard, test_input};
+  use std::time::Duration;
 
   // ===================== has_braces =====================
 
@@ -2525,10 +2778,7 @@ mod tests {
 
   #[test]
   fn braces_simple_list() {
-    assert_eq!(
+    assert_eq!(expand_braces_full("{a,b,c}").unwrap(), vec!["a", "b", "c"]);
-      expand_braces_full("{a,b,c}").unwrap(),
-      vec!["a", "b", "c"]
-    );
   }
 
   #[test]
@@ -2617,7 +2867,19 @@ mod tests {
   #[test]
   fn braces_cursed() {
     let result = expand_braces_full("foo{a,{1,2,3,{1..4},5},c}{5..1}bar").unwrap();
-		assert_eq!(result, vec![ "fooa5bar", "fooa4bar", "fooa3bar", "fooa2bar", "fooa1bar", "foo15bar", "foo14bar", "foo13bar", "foo12bar", "foo11bar", "foo25bar", "foo24bar", "foo23bar", "foo22bar", "foo21bar", "foo35bar", "foo34bar", "foo33bar", "foo32bar", "foo31bar", "foo15bar", "foo14bar", "foo13bar", "foo12bar", "foo11bar", "foo25bar", "foo24bar", "foo23bar", "foo22bar", "foo21bar", "foo35bar", "foo34bar", "foo33bar", "foo32bar", "foo31bar", "foo45bar", "foo44bar", "foo43bar", "foo42bar", "foo41bar", "foo55bar", "foo54bar", "foo53bar", "foo52bar", "foo51bar", "fooc5bar", "fooc4bar", "fooc3bar", "fooc2bar", "fooc1bar", ])
+    assert_eq!(
+      result,
+      vec![
+        "fooa5bar", "fooa4bar", "fooa3bar", "fooa2bar", "fooa1bar", "foo15bar", "foo14bar",
+        "foo13bar", "foo12bar", "foo11bar", "foo25bar", "foo24bar", "foo23bar", "foo22bar",
+        "foo21bar", "foo35bar", "foo34bar", "foo33bar", "foo32bar", "foo31bar", "foo15bar",
+        "foo14bar", "foo13bar", "foo12bar", "foo11bar", "foo25bar", "foo24bar", "foo23bar",
+        "foo22bar", "foo21bar", "foo35bar", "foo34bar", "foo33bar", "foo32bar", "foo31bar",
+        "foo45bar", "foo44bar", "foo43bar", "foo42bar", "foo41bar", "foo55bar", "foo54bar",
+        "foo53bar", "foo52bar", "foo51bar", "fooc5bar", "fooc4bar", "fooc3bar", "fooc2bar",
+        "fooc1bar",
+      ]
+    )
   }
 
   // ===================== Arithmetic =====================
@@ -2858,7 +3120,8 @@ mod tests {
   #[test]
   fn unescape_backslash() {
     let result = unescape_str("hello\\nworld");
-    assert_eq!(result, "hellonworld");
+    let expected = format!("hello{}nworld", markers::ESCAPE);
+    assert_eq!(result, expected);
   }
 
   #[test]
@@ -3089,10 +3352,22 @@ mod tests {
 
   #[test]
   fn key_alias_arrows() {
-    assert_eq!(parse_key_alias("UP").unwrap(), KeyEvent(KeyCode::Up, ModKeys::NONE));
+    assert_eq!(
-    assert_eq!(parse_key_alias("DOWN").unwrap(), KeyEvent(KeyCode::Down, ModKeys::NONE));
+      parse_key_alias("UP").unwrap(),
-    assert_eq!(parse_key_alias("LEFT").unwrap(), KeyEvent(KeyCode::Left, ModKeys::NONE));
+      KeyEvent(KeyCode::Up, ModKeys::NONE)
-    assert_eq!(parse_key_alias("RIGHT").unwrap(), KeyEvent(KeyCode::Right, ModKeys::NONE));
+    );
+    assert_eq!(
+      parse_key_alias("DOWN").unwrap(),
+      KeyEvent(KeyCode::Down, ModKeys::NONE)
+    );
+    assert_eq!(
+      parse_key_alias("LEFT").unwrap(),
+      KeyEvent(KeyCode::Left, ModKeys::NONE)
+    );
+    assert_eq!(
+      parse_key_alias("RIGHT").unwrap(),
+      KeyEvent(KeyCode::Right, ModKeys::NONE)
+    );
   }
 
   #[test]
@@ -3104,7 +3379,13 @@ mod tests {
   #[test]
   fn key_alias_ctrl_shift_alt_modifier() {
     let key = parse_key_alias("C-S-A-b").unwrap();
-    assert_eq!(key, KeyEvent(KeyCode::Char('B'), ModKeys::CTRL | ModKeys::SHIFT | ModKeys::ALT));
+    assert_eq!(
+      key,
+      KeyEvent(
+        KeyCode::Char('B'),
+        ModKeys::CTRL | ModKeys::SHIFT | ModKeys::ALT
+      )
+    );
   }
 
   #[test]
@@ -3296,7 +3577,14 @@ mod tests {
   #[test]
   fn param_remove_shortest_prefix() {
     let _guard = TestGuard::new();
-    write_vars(|v| v.set_var("PATH", VarKind::Str("/usr/local/bin".into()), VarFlags::NONE)).unwrap();
+    write_vars(|v| {
+      v.set_var(
+        "PATH",
+        VarKind::Str("/usr/local/bin".into()),
+        VarFlags::NONE,
+      )
+    })
+    .unwrap();
 
     let result = perform_param_expansion("PATH#*/").unwrap();
     assert_eq!(result, "usr/local/bin");
@@ -3305,7 +3593,14 @@ mod tests {
   #[test]
   fn param_remove_longest_prefix() {
     let _guard = TestGuard::new();
-    write_vars(|v| v.set_var("PATH", VarKind::Str("/usr/local/bin".into()), VarFlags::NONE)).unwrap();
+    write_vars(|v| {
+      v.set_var(
+        "PATH",
+        VarKind::Str("/usr/local/bin".into()),
+        VarFlags::NONE,
+      )
+    })
+    .unwrap();
 
     let result = perform_param_expansion("PATH##*/").unwrap();
     assert_eq!(result, "bin");
@@ -3419,7 +3714,10 @@ mod tests {
   fn word_split_default_ifs() {
     let _guard = TestGuard::new();
 
-    let mut exp = Expander { raw: "hello world\tfoo".to_string() };
+    let mut exp = Expander {
+      raw: "hello world\tfoo".to_string(),
+      flags: TkFlags::empty(),
+    };
     let words = exp.split_words();
     assert_eq!(words, vec!["hello", "world", "foo"]);
   }
@@ -3427,9 +3725,14 @@ mod tests {
   #[test]
   fn word_split_custom_ifs() {
     let _guard = TestGuard::new();
-    unsafe { std::env::set_var("IFS", ":"); }
+    unsafe {
+      std::env::set_var("IFS", ":");
+    }
 
-    let mut exp = Expander { raw: "a:b:c".to_string() };
+    let mut exp = Expander {
+      raw: "a:b:c".to_string(),
+      flags: TkFlags::empty(),
+    };
     let words = exp.split_words();
     assert_eq!(words, vec!["a", "b", "c"]);
   }
@@ -3437,9 +3740,14 @@ mod tests {
   #[test]
   fn word_split_empty_ifs() {
     let _guard = TestGuard::new();
-    unsafe { std::env::set_var("IFS", ""); }
+    unsafe {
+      std::env::set_var("IFS", "");
+    }
 
-    let mut exp = Expander { raw: "hello world".to_string() };
+    let mut exp = Expander {
+      raw: "hello world".to_string(),
+      flags: TkFlags::empty(),
+    };
     let words = exp.split_words();
     assert_eq!(words, vec!["hello world"]);
   }
@@ -3449,11 +3757,82 @@ mod tests {
     let _guard = TestGuard::new();
 
     let raw = format!("{}hello world{}", markers::DUB_QUOTE, markers::DUB_QUOTE);
-    let mut exp = Expander { raw };
+    let mut exp = Expander {
+      raw,
+      flags: TkFlags::empty(),
+    };
     let words = exp.split_words();
     assert_eq!(words, vec!["hello world"]);
   }
 
+  // ===================== Escaped Word Splitting =====================
+
+  #[test]
+  fn word_split_escaped_space() {
+    let _guard = TestGuard::new();
+
+    let raw = format!("hello{}world", unescape_str("\\ "));
+    let mut exp = Expander {
+      raw,
+      flags: TkFlags::empty(),
+    };
+    let words = exp.split_words();
+    assert_eq!(words, vec!["hello world"]);
+  }
+
+  #[test]
+  fn word_split_escaped_tab() {
+    let _guard = TestGuard::new();
+
+    let raw = format!("hello{}world", unescape_str("\\\t"));
+    let mut exp = Expander {
+      raw,
+      flags: TkFlags::empty(),
+    };
+    let words = exp.split_words();
+    assert_eq!(words, vec!["hello\tworld"]);
+  }
+
+  #[test]
+  fn word_split_escaped_custom_ifs() {
+    let _guard = TestGuard::new();
+    unsafe {
+      std::env::set_var("IFS", ":");
+    }
+
+    let raw = format!("a{}b:c", unescape_str("\\:"));
+    let mut exp = Expander {
+      raw,
+      flags: TkFlags::empty(),
+    };
+    let words = exp.split_words();
+    assert_eq!(words, vec!["a:b", "c"]);
+  }
+
+  // ===================== Parameter Expansion with Escapes (TestGuard) =====================
+
+  #[test]
+  fn param_exp_prefix_removal_escaped() {
+    let guard = TestGuard::new();
+    write_vars(|v| v.set_var("branch", VarKind::Str("## main".into()), VarFlags::NONE)).unwrap();
+
+    test_input("echo \"${branch#\\#\\# }\"").unwrap();
+
+    let out = guard.read_output();
+    assert_eq!(out, "main\n");
+  }
+
+  #[test]
+  fn param_exp_suffix_removal_escaped() {
+    let guard = TestGuard::new();
+    write_vars(|v| v.set_var("val", VarKind::Str("hello world!!".into()), VarFlags::NONE)).unwrap();
+
+    test_input("echo \"${val%\\!\\!}\"").unwrap();
+
+    let out = guard.read_output();
+    assert_eq!(out, "hello world\n");
+  }
+
   // ===================== Arithmetic with Variables (TestGuard) =====================
 
   #[test]
@@ -3478,8 +3857,13 @@ mod tests {
   fn array_index_first() {
     let _guard = TestGuard::new();
     write_vars(|v| {
-      v.set_var("arr", VarKind::arr_from_vec(vec!["a".into(), "b".into(), "c".into()]), VarFlags::NONE)
+      v.set_var(
-    }).unwrap();
+        "arr",
+        VarKind::arr_from_vec(vec!["a".into(), "b".into(), "c".into()]),
+        VarFlags::NONE,
+      )
+    })
+    .unwrap();
 
     let val = read_vars(|v| v.index_var("arr", ArrIndex::Literal(0))).unwrap();
     assert_eq!(val, "a");
@@ -3489,8 +3873,13 @@ mod tests {
   fn array_index_second() {
     let _guard = TestGuard::new();
     write_vars(|v| {
-      v.set_var("arr", VarKind::arr_from_vec(vec!["x".into(), "y".into(), "z".into()]), VarFlags::NONE)
+      v.set_var(
-    }).unwrap();
+        "arr",
+        VarKind::arr_from_vec(vec!["x".into(), "y".into(), "z".into()]),
+        VarFlags::NONE,
+      )
+    })
+    .unwrap();
 
     let val = read_vars(|v| v.index_var("arr", ArrIndex::Literal(1))).unwrap();
     assert_eq!(val, "y");
@@ -3500,8 +3889,13 @@ mod tests {
   fn array_all_elems() {
     let _guard = TestGuard::new();
     write_vars(|v| {
-      v.set_var("arr", VarKind::arr_from_vec(vec!["a".into(), "b".into(), "c".into()]), VarFlags::NONE)
+      v.set_var(
-    }).unwrap();
+        "arr",
+        VarKind::arr_from_vec(vec!["a".into(), "b".into(), "c".into()]),
+        VarFlags::NONE,
+      )
+    })
+    .unwrap();
 
     let elems = read_vars(|v| v.get_arr_elems("arr")).unwrap();
     assert_eq!(elems, vec!["a", "b", "c"]);
@@ -3511,8 +3905,13 @@ mod tests {
   fn array_elem_count() {
     let _guard = TestGuard::new();
     write_vars(|v| {
-      v.set_var("arr", VarKind::arr_from_vec(vec!["a".into(), "b".into(), "c".into()]), VarFlags::NONE)
+      v.set_var(
-    }).unwrap();
+        "arr",
+        VarKind::arr_from_vec(vec!["a".into(), "b".into(), "c".into()]),
+        VarFlags::NONE,
+      )
+    })
+    .unwrap();
 
     let elems = read_vars(|v| v.get_arr_elems("arr")).unwrap();
     assert_eq!(elems.len(), 3);
@@ -3525,7 +3924,9 @@ mod tests {
     let _guard = TestGuard::new();
     let dummy_span = Span::default();
     crate::state::SHED.with(|s| {
-      s.logic.borrow_mut().insert_alias("ll", "ls -la", dummy_span.clone());
+      s.logic
+        .borrow_mut()
+        .insert_alias("ll", "ls -la", dummy_span.clone());
     });
 
     let log_tab = crate::state::SHED.with(|s| s.logic.borrow().clone());
@@ -3538,7 +3939,9 @@ mod tests {
     let _guard = TestGuard::new();
     let dummy_span = Span::default();
     crate::state::SHED.with(|s| {
-      s.logic.borrow_mut().insert_alias("foo", "foo --verbose", dummy_span.clone());
+      s.logic
+        .borrow_mut()
+        .insert_alias("foo", "foo --verbose", dummy_span.clone());
     });
 
     let log_tab = crate::state::SHED.with(|s| s.logic.borrow().clone());
@@ -3553,7 +3956,14 @@ mod tests {
   #[test]
   fn index_simple() {
     let guard = TestGuard::new();
-		write_vars(|v| v.set_var("arr", VarKind::Arr(VecDeque::from(["foo".into(), "bar".into(), "biz".into()])), VarFlags::NONE)).unwrap();
+    write_vars(|v| {
+      v.set_var(
+        "arr",
+        VarKind::Arr(VecDeque::from(["foo".into(), "bar".into(), "biz".into()])),
+        VarFlags::NONE,
+      )
+    })
+    .unwrap();
 
     test_input("echo $arr").unwrap();
 
@@ -3564,8 +3974,22 @@ mod tests {
   #[test]
   fn index_cursed() {
     let guard = TestGuard::new();
-		write_vars(|v| v.set_var("arr", VarKind::Arr(VecDeque::from(["foo".into(), "bar".into(), "biz".into()])), VarFlags::NONE)).unwrap();
+    write_vars(|v| {
-		write_vars(|v| v.set_var("i", VarKind::Arr(VecDeque::from(["0".into(), "1".into(), "2".into()])), VarFlags::NONE)).unwrap();
+      v.set_var(
+        "arr",
+        VarKind::Arr(VecDeque::from(["foo".into(), "bar".into(), "biz".into()])),
+        VarFlags::NONE,
+      )
+    })
+    .unwrap();
+    write_vars(|v| {
+      v.set_var(
+        "i",
+        VarKind::Arr(VecDeque::from(["0".into(), "1".into(), "2".into()])),
+        VarFlags::NONE,
+      )
+    })
+    .unwrap();
 
     test_input("echo $echo ${var:-${arr[$(($(echo ${i[0]}) + 1))]}}").unwrap();
 

src/getopt.rs

@@ -3,7 +3,11 @@ use std::sync::Arc;
 use ariadne::Fmt;
 use fmt::Display;
 
-use crate::{libsh::error::{ShErr, ShErrKind, ShResult, next_color}, parse::lex::Tk, prelude::*};
+use crate::{
+  libsh::error::{ShErr, ShErrKind, ShResult, next_color},
+  parse::lex::Tk,
+  prelude::*,
+};
 
 pub type OptSet = Arc<[Opt]>;
 
@@ -82,17 +86,23 @@ pub fn get_opts_from_tokens(
   sort_tks(tokens, opt_specs, false)
 }
 
-pub fn sort_tks(tokens: Vec<Tk>, opt_specs: &[OptSpec], strict: bool) -> ShResult<(Vec<Tk>, Vec<Opt>)> {
+pub fn sort_tks(
+  tokens: Vec<Tk>,
+  opt_specs: &[OptSpec],
+  strict: bool,
+) -> ShResult<(Vec<Tk>, Vec<Opt>)> {
   let mut tokens_iter = tokens
     .into_iter()
     .map(|t| t.expand())
     .collect::<ShResult<Vec<_>>>()?
-    .into_iter();
+    .into_iter()
+    .peekable();
   let mut opts = vec![];
   let mut non_opts = vec![];
 
   while let Some(token) = tokens_iter.next() {
     if &token.to_string() == "--" {
+      non_opts.push(token);
       non_opts.extend(tokens_iter);
       break;
     }
@@ -140,12 +150,11 @@ pub fn sort_tks(tokens: Vec<Tk>, opt_specs: &[OptSpec], strict: bool) -> ShResul
   Ok((non_opts, opts))
 }
 
-
 #[cfg(test)]
 mod tests {
   use crate::parse::lex::{LexFlags, LexStream};
 
-use super::*;
+  use super::*;
 
   #[test]
   fn parse_short_single() {
@@ -156,7 +165,10 @@ use super::*;
   #[test]
   fn parse_short_combined() {
     let opts = Opt::parse("-abc");
-    assert_eq!(opts, vec![Opt::Short('a'), Opt::Short('b'), Opt::Short('c')]);
+    assert_eq!(
+      opts,
+      vec![Opt::Short('a'), Opt::Short('b'), Opt::Short('c')]
+    );
   }
 
   #[test]
@@ -173,7 +185,12 @@ use super::*;
 
   #[test]
   fn get_opts_basic() {
-    let words = vec!["file.txt".into(), "-v".into(), "--help".into(), "arg".into()];
+    let words = vec![
+      "file.txt".into(),
+      "-v".into(),
+      "--help".into(),
+      "arg".into(),
+    ];
     let (non_opts, opts) = get_opts(words);
     assert_eq!(non_opts, vec!["file.txt", "arg"]);
     assert_eq!(opts, vec![Opt::Short('v'), Opt::Long("help".into())]);
@@ -191,7 +208,10 @@ use super::*;
   fn get_opts_combined_short() {
     let words = vec!["-abc".into(), "file".into()];
     let (non_opts, opts) = get_opts(words);
-    assert_eq!(opts, vec![Opt::Short('a'), Opt::Short('b'), Opt::Short('c')]);
+    assert_eq!(
+      opts,
+      vec![Opt::Short('a'), Opt::Short('b'), Opt::Short('c')]
+    );
     assert_eq!(non_opts, vec!["file"]);
   }
 
@@ -215,7 +235,10 @@ use super::*;
     assert_eq!(Opt::Short('v').to_string(), "-v");
     assert_eq!(Opt::Long("help".into()).to_string(), "--help");
     assert_eq!(Opt::ShortWithArg('o', "file".into()).to_string(), "-o file");
-    assert_eq!(Opt::LongWithArg("output".into(), "file".into()).to_string(), "--output file");
+    assert_eq!(
+      Opt::LongWithArg("output".into(), "file".into()).to_string(),
+      "--output file"
+    );
   }
 
   fn lex(input: &str) -> Vec<Tk> {
@@ -229,8 +252,14 @@ use super::*;
     let tokens = lex("file.txt --help -v arg");
 
     let opt_spec = vec![
-			OptSpec { opt: Opt::Short('v'), takes_arg: false },
+      OptSpec {
-			OptSpec { opt: Opt::Long("help".into()), takes_arg: false },
+        opt: Opt::Short('v'),
+        takes_arg: false,
+      },
+      OptSpec {
+        opt: Opt::Long("help".into()),
+        takes_arg: false,
+      },
     ];
 
     let (non_opts, opts) = get_opts_from_tokens(tokens, &opt_spec).unwrap();
@@ -248,9 +277,10 @@ use super::*;
   fn tks_short_with_arg() {
     let tokens = lex("-o output.txt file.txt");
 
-		let opt_spec = vec![
+    let opt_spec = vec![OptSpec {
-			OptSpec { opt: Opt::Short('o'), takes_arg: true },
+      opt: Opt::Short('o'),
-		];
+      takes_arg: true,
+    }];
 
     let (non_opts, opts) = get_opts_from_tokens(tokens, &opt_spec).unwrap();
 
@@ -263,13 +293,17 @@ use super::*;
   fn tks_long_with_arg() {
     let tokens = lex("--output result.txt input.txt");
 
-		let opt_spec = vec![
+    let opt_spec = vec![OptSpec {
-			OptSpec { opt: Opt::Long("output".into()), takes_arg: true },
+      opt: Opt::Long("output".into()),
-		];
+      takes_arg: true,
+    }];
 
     let (non_opts, opts) = get_opts_from_tokens(tokens, &opt_spec).unwrap();
 
-		assert_eq!(opts, vec![Opt::LongWithArg("output".into(), "result.txt".into())]);
+    assert_eq!(
+      opts,
+      vec![Opt::LongWithArg("output".into(), "result.txt".into())]
+    );
     let non_opts: Vec<String> = non_opts.into_iter().map(|s| s.to_string()).collect();
     assert!(non_opts.contains(&"input.txt".to_string()));
   }
@@ -279,8 +313,14 @@ use super::*;
     let tokens = lex("-v -- -a --foo");
 
     let opt_spec = vec![
-			OptSpec { opt: Opt::Short('v'), takes_arg: false },
+      OptSpec {
-			OptSpec { opt: Opt::Short('a'), takes_arg: false },
+        opt: Opt::Short('v'),
+        takes_arg: false,
+      },
+      OptSpec {
+        opt: Opt::Short('a'),
+        takes_arg: false,
+      },
     ];
 
     let (non_opts, opts) = get_opts_from_tokens(tokens, &opt_spec).unwrap();
@@ -296,29 +336,47 @@ use super::*;
     let tokens = lex("-abc");
 
     let opt_spec = vec![
-			OptSpec { opt: Opt::Short('a'), takes_arg: false },
+      OptSpec {
-			OptSpec { opt: Opt::Short('b'), takes_arg: false },
+        opt: Opt::Short('a'),
-			OptSpec { opt: Opt::Short('c'), takes_arg: false },
+        takes_arg: false,
+      },
+      OptSpec {
+        opt: Opt::Short('b'),
+        takes_arg: false,
+      },
+      OptSpec {
+        opt: Opt::Short('c'),
+        takes_arg: false,
+      },
     ];
 
     let (_non_opts, opts) = get_opts_from_tokens(tokens, &opt_spec).unwrap();
 
-		assert_eq!(opts, vec![Opt::Short('a'), Opt::Short('b'), Opt::Short('c')]);
+    assert_eq!(
+      opts,
+      vec![Opt::Short('a'), Opt::Short('b'), Opt::Short('c')]
+    );
   }
 
   #[test]
   fn tks_unknown_opt_becomes_non_opt() {
     let tokens = lex("-v -x file");
 
-		let opt_spec = vec![
+    let opt_spec = vec![OptSpec {
-			OptSpec { opt: Opt::Short('v'), takes_arg: false },
+      opt: Opt::Short('v'),
-		];
+      takes_arg: false,
+    }];
 
     let (non_opts, opts) = get_opts_from_tokens(tokens, &opt_spec).unwrap();
 
     assert_eq!(opts, vec![Opt::Short('v')]);
     // -x is not in spec, so its token goes to non_opts
-		assert!(non_opts.into_iter().map(|s| s.to_string()).any(|s| s == "-x" || s == "file"));
+    assert!(
+      non_opts
+        .into_iter()
+        .map(|s| s.to_string())
+        .any(|s| s == "-x" || s == "file")
+    );
   }
 
   #[test]
@@ -326,16 +384,25 @@ use super::*;
     let tokens = lex("-n 5 --output file.txt input");
 
     let opt_spec = vec![
-			OptSpec { opt: Opt::Short('n'), takes_arg: true },
+      OptSpec {
-			OptSpec { opt: Opt::Long("output".into()), takes_arg: true },
+        opt: Opt::Short('n'),
+        takes_arg: true,
+      },
+      OptSpec {
+        opt: Opt::Long("output".into()),
+        takes_arg: true,
+      },
     ];
 
     let (non_opts, opts) = get_opts_from_tokens(tokens, &opt_spec).unwrap();
 
-		assert_eq!(opts, vec![
+    assert_eq!(
+      opts,
+      vec![
         Opt::ShortWithArg('n', "5".into()),
         Opt::LongWithArg("output".into(), "file.txt".into()),
-		]);
+      ]
+    );
     let non_opts: Vec<String> = non_opts.into_iter().map(|s| s.to_string()).collect();
     assert!(non_opts.contains(&"input".to_string()));
   }

src/jobs.rs

@@ -1,4 +1,7 @@
+use std::collections::VecDeque;
+
 use ariadne::Fmt;
+use nix::unistd::getpid;
 use scopeguard::defer;
 use yansi::Color;
 
@@ -10,7 +13,7 @@ use crate::{
   prelude::*,
   procio::{IoMode, borrow_fd},
   signal::{disable_reaping, enable_reaping},
-  state::{self, ShellParam, set_status, write_jobs, write_vars},
+  state::{self, ShellParam, VarFlags, VarKind, set_status, write_jobs, write_vars},
 };
 
 pub const SIG_EXIT_OFFSET: i32 = 128;
@@ -596,6 +599,29 @@ impl Job {
       .map(|chld| chld.stat())
       .collect::<Vec<WtStat>>()
   }
+  pub fn pipe_status(stats: &[WtStat]) -> Option<Vec<i32>> {
+    if stats.iter().any(|stat| {
+      matches!(
+        stat,
+        WtStat::StillAlive | WtStat::Continued(_) | WtStat::PtraceSyscall(_)
+      )
+    }) || stats.len() <= 1
+    {
+      return None;
+    }
+    Some(
+      stats
+        .iter()
+        .map(|stat| match stat {
+          WtStat::Exited(_, code) => *code,
+          WtStat::Signaled(_, signal, _) => SIG_EXIT_OFFSET + *signal as i32,
+          WtStat::Stopped(_, signal) => SIG_EXIT_OFFSET + *signal as i32,
+          WtStat::PtraceEvent(_, signal, _) => SIG_EXIT_OFFSET + *signal as i32,
+          WtStat::PtraceSyscall(_) | WtStat::Continued(_) | WtStat::StillAlive => unreachable!(),
+        })
+        .collect(),
+    )
+  }
   pub fn get_pids(&self) -> Vec<Pid> {
     self
       .children
@@ -839,22 +865,35 @@ pub fn wait_fg(job: Job, interactive: bool) -> ShResult<()> {
     enable_reaping();
   }
   let statuses = write_jobs(|j| j.new_fg(job))?;
-  for status in statuses {
+  for status in &statuses {
-    code = code_from_status(&status).unwrap_or(0);
+    code = code_from_status(status).unwrap_or(0);
     match status {
       WtStat::Stopped(_, _) => {
         was_stopped = true;
-        write_jobs(|j| j.fg_to_bg(status))?;
+        write_jobs(|j| j.fg_to_bg(*status))?;
       }
       WtStat::Signaled(_, sig, _) => {
-        if sig == Signal::SIGTSTP {
+        if *sig == Signal::SIGINT {
+          // interrupt propagates to the shell
+          // necessary for interrupting stuff like
+          // while/for loops
+          kill(getpid(), Signal::SIGINT)?;
+        } else if *sig == Signal::SIGTSTP {
           was_stopped = true;
-          write_jobs(|j| j.fg_to_bg(status))?;
+          write_jobs(|j| j.fg_to_bg(*status))?;
         }
       }
       _ => { /* Do nothing */ }
     }
   }
+  if let Some(pipe_status) = Job::pipe_status(&statuses) {
+    let pipe_status = pipe_status
+      .into_iter()
+      .map(|s| s.to_string())
+      .collect::<VecDeque<String>>();
+
+    write_vars(|v| v.set_var("PIPESTATUS", VarKind::Arr(pipe_status), VarFlags::NONE))?;
+  }
   // If job wasn't stopped (moved to bg), clear the fg slot
   if !was_stopped {
     write_jobs(|j| {

src/libsh/error.rs

@@ -1,10 +1,10 @@
 use ariadne::{Color, Fmt};
 use ariadne::{Report, ReportKind};
 use rand::TryRng;
-use yansi::Paint;
 use std::cell::RefCell;
 use std::collections::{HashMap, VecDeque};
 use std::fmt::Display;
+use yansi::Paint;
 
 use crate::procio::RedirGuard;
 use crate::{
@@ -201,6 +201,7 @@ impl ShErr {
   pub fn is_flow_control(&self) -> bool {
     self.kind.is_flow_control()
   }
+  /// Promotes a shell error from a simple error to an error that blames a span
   pub fn promote(mut self, span: Span) -> Self {
     if self.notes.is_empty() {
       return self;
@@ -208,6 +209,8 @@ impl ShErr {
     let first = self.notes[0].clone();
     if self.notes.len() > 1 {
       self.notes = self.notes[1..].to_vec();
+    } else {
+      self.notes = vec![];
     }
 
     self.labeled(span, first)
@@ -456,7 +459,7 @@ pub enum ShErrKind {
   FuncReturn(i32),
   LoopContinue(i32),
   LoopBreak(i32),
-  ClearReadline,
+  Interrupt,
   Null,
 }
 
@@ -468,7 +471,7 @@ impl ShErrKind {
         | Self::FuncReturn(_)
         | Self::LoopContinue(_)
         | Self::LoopBreak(_)
-        | Self::ClearReadline
+        | Self::Interrupt
     )
   }
 }
@@ -493,7 +496,7 @@ impl Display for ShErrKind {
       Self::LoopBreak(_) => "Syntax Error",
       Self::ReadlineErr => "Readline Error",
       Self::ExCommand => "Ex Command Error",
-      Self::ClearReadline => "",
+      Self::Interrupt => "",
       Self::Null => "",
     };
     write!(f, "{output}")

src/libsh/guards.rs

@@ -3,7 +3,7 @@ use std::collections::HashSet;
 use std::os::fd::{BorrowedFd, RawFd};
 
 use nix::sys::termios::{self, LocalFlags, Termios, tcgetattr, tcsetattr};
-use nix::unistd::isatty;
+use nix::unistd::{isatty, write};
 use scopeguard::guard;
 
 thread_local! {
@@ -147,11 +147,10 @@ impl RawModeGuard {
     let orig = ORIG_TERMIOS
       .with(|cell| cell.borrow().clone())
       .expect("with_cooked_mode called before raw_mode()");
-    tcsetattr(borrow_fd(*TTY_FILENO), termios::SetArg::TCSANOW, &orig)
+    tcsetattr(borrow_fd(*TTY_FILENO), termios::SetArg::TCSANOW, &orig).ok();
-      .expect("Failed to restore cooked mode");
     let res = f();
-    tcsetattr(borrow_fd(*TTY_FILENO), termios::SetArg::TCSANOW, &current)
+    tcsetattr(borrow_fd(*TTY_FILENO), termios::SetArg::TCSANOW, &current).ok();
-      .expect("Failed to restore raw mode");
+    unsafe { write(BorrowedFd::borrow_raw(*TTY_FILENO), b"\x1b[?1l\x1b>").ok() };
     res
   }
 }
@@ -159,11 +158,12 @@ impl RawModeGuard {
 impl Drop for RawModeGuard {
   fn drop(&mut self) {
     unsafe {
-      let _ = termios::tcsetattr(
+      termios::tcsetattr(
         BorrowedFd::borrow_raw(self.fd),
         termios::SetArg::TCSANOW,
         &self.orig,
-      );
+      )
+      .ok();
     }
   }
 }

src/libsh/sys.rs

@@ -2,6 +2,15 @@ use std::sync::LazyLock;
 
 use crate::prelude::*;
 
+/// Minimum fd number for shell-internal file descriptors.
+const MIN_INTERNAL_FD: RawFd = 10;
+
 pub static TTY_FILENO: LazyLock<RawFd> = LazyLock::new(|| {
-  open("/dev/tty", OFlag::O_RDWR, Mode::empty()).expect("Failed to open /dev/tty")
+  let fd = open("/dev/tty", OFlag::O_RDWR, Mode::empty()).expect("Failed to open /dev/tty");
+  // Move the tty fd above the user-accessible range so that
+  // `exec 3>&-` and friends don't collide with shell internals.
+  let high =
+    fcntl(fd, FcntlArg::F_DUPFD_CLOEXEC(MIN_INTERNAL_FD)).expect("Failed to dup /dev/tty high");
+  close(fd).ok();
+  high
 });

src/libsh/utils.rs

@@ -8,6 +8,33 @@ use crate::parse::{Node, Redir, RedirType};
 use crate::prelude::*;
 use crate::state::AutoCmd;
 
+#[macro_export]
+/// Defines a two-way mapping between an enum and its string representation, implementing both Display and FromStr.
+macro_rules! two_way_display {
+	($name:ident, $($member:ident <=> $val:expr;)*) => {
+		impl Display for $name {
+			fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+				match self {
+					$(Self::$member => write!(f, $val),)*
+				}
+			}
+		}
+
+		impl FromStr for $name {
+			type Err = ShErr;
+			fn from_str(s: &str) -> Result<Self, Self::Err> {
+				match s {
+					$($val => Ok(Self::$member),)*
+						_ => Err(ShErr::simple(
+								ShErrKind::ParseErr,
+								format!("Invalid {} kind: {}",stringify!($name),s),
+						)),
+				}
+			}
+		}
+	};
+}
+
 pub trait VecDequeExt<T> {
   fn to_vec(self) -> Vec<T>;
 }

src/main.rs

@@ -23,6 +23,7 @@ pub mod testutil;
 use std::os::fd::BorrowedFd;
 use std::process::ExitCode;
 use std::sync::atomic::Ordering;
+use std::time::Duration;
 
 use nix::errno::Errno;
 use nix::poll::{PollFd, PollFlags, PollTimeout, poll};
@@ -38,15 +39,18 @@ use crate::prelude::*;
 use crate::procio::borrow_fd;
 use crate::readline::term::{LineWriter, RawModeGuard, raw_mode};
 use crate::readline::{Prompt, ReadlineEvent, ShedVi};
-use crate::signal::{GOT_SIGWINCH, JOB_DONE, QUIT_CODE, check_signals, sig_setup, signals_pending};
+use crate::signal::{
-use crate::state::{AutoCmdKind, read_logic, read_shopts, source_rc, write_jobs, write_meta};
+  GOT_SIGUSR1, GOT_SIGWINCH, JOB_DONE, QUIT_CODE, check_signals, sig_setup, signals_pending,
+};
+use crate::state::{
+  AutoCmdKind, read_logic, read_shopts, source_env, source_login, source_rc, write_jobs,
+  write_meta, write_shopts,
+};
 use clap::Parser;
-use state::{read_vars, write_vars};
+use state::write_vars;
 
 #[derive(Parser, Debug)]
 struct ShedArgs {
-  script: Option<String>,
-
   #[arg(short)]
   command: Option<String>,
 
@@ -59,24 +63,13 @@ struct ShedArgs {
   #[arg(short)]
   interactive: bool,
 
+  #[arg(short)]
+  stdin: bool,
+
   #[arg(long, short)]
   login_shell: bool,
 }
 
-/// Force evaluation of lazily-initialized values early in shell startup.
-///
-/// In particular, this ensures that the variable table is initialized, which
-/// populates environment variables from the system. If this initialization is
-/// deferred too long, features like prompt expansion may fail due to missing
-/// environment variables.
-///
-/// This function triggers initialization by calling `read_vars` with a no-op
-/// closure, which forces access to the variable table and causes its `LazyLock`
-/// constructor to run.
-fn kickstart_lazy_evals() {
-  read_vars(|_| {});
-}
-
 /// We need to make sure that even if we panic, our child processes get sighup
 fn setup_panic_handler() {
   let default_panic_hook = std::panic::take_hook();
@@ -111,7 +104,6 @@ fn setup_panic_handler() {
 fn main() -> ExitCode {
   yansi::enable();
   env_logger::init();
-  kickstart_lazy_evals();
   setup_panic_handler();
 
   let mut args = ShedArgs::parse();
@@ -130,10 +122,27 @@ fn main() -> ExitCode {
     return ExitCode::SUCCESS;
   }
 
-  if let Err(e) = if let Some(path) = args.script {
+  // Increment SHLVL, or set to 1 if not present or invalid.
-    run_script(path, args.script_args)
+  // This var represents how many nested shell instances we're in
-  } else if let Some(cmd) = args.command {
+  if let Ok(var) = env::var("SHLVL")
+    && let Ok(lvl) = var.parse::<u32>()
+  {
+    unsafe { env::set_var("SHLVL", (lvl + 1).to_string()) };
+  } else {
+    unsafe { env::set_var("SHLVL", "1") };
+  }
+
+  if let Err(e) = source_env() {
+    e.print_error();
+  }
+
+  if let Err(e) = if let Some(cmd) = args.command {
     exec_dash_c(cmd)
+  } else if args.stdin || !isatty(STDIN_FILENO).unwrap_or(false) {
+    read_commands(args.script_args)
+  } else if !args.script_args.is_empty() {
+    let path = args.script_args.remove(0);
+    run_script(path, args.script_args)
   } else {
     let res = shed_interactive(args);
     write(borrow_fd(*TTY_FILENO), b"\x1b[?2004l").ok(); // disable bracketed paste mode on exit
@@ -152,9 +161,41 @@ fn main() -> ExitCode {
   on_exit_autocmds.exec();
 
   write_jobs(|j| j.hang_up());
+
+  let code = QUIT_CODE.load(Ordering::SeqCst) as u8;
+  if code == 0 && isatty(STDIN_FILENO).unwrap_or_default() {
+    write(borrow_fd(STDERR_FILENO), b"\nexit\n").ok();
+  }
+
   ExitCode::from(QUIT_CODE.load(Ordering::SeqCst) as u8)
 }
 
+fn read_commands(args: Vec<String>) -> ShResult<()> {
+  let mut input = vec![];
+  let mut read_buf = [0u8; 4096];
+  loop {
+    match read(STDIN_FILENO, &mut read_buf) {
+      Ok(0) => break,
+      Ok(n) => input.extend_from_slice(&read_buf[..n]),
+      Err(Errno::EINTR) => continue,
+      Err(e) => {
+        QUIT_CODE.store(1, Ordering::SeqCst);
+        return Err(ShErr::simple(
+          ShErrKind::CleanExit(1),
+          format!("error reading from stdin: {e}"),
+        ));
+      }
+    }
+  }
+
+  let commands = String::from_utf8_lossy(&input).to_string();
+  for arg in args {
+    write_vars(|v| v.cur_scope_mut().bpush_arg(arg))
+  }
+
+  exec_input(commands, None, false, None)
+}
+
 fn run_script<P: AsRef<Path>>(path: P, args: Vec<String>) -> ShResult<()> {
   let path = path.as_ref();
   let path_raw = path.to_string_lossy().to_string();
@@ -190,6 +231,12 @@ fn shed_interactive(args: ShedArgs) -> ShResult<()> {
   let _raw_mode = raw_mode(); // sets raw mode, restores termios on drop
   sig_setup(args.login_shell);
 
+  if args.login_shell
+    && let Err(e) = source_login()
+  {
+    e.print_error();
+  }
+
   if let Err(e) = source_rc() {
     e.print_error();
   }
@@ -209,6 +256,8 @@ fn shed_interactive(args: ShedArgs) -> ShResult<()> {
 
   readline.writer.flush_write("\x1b[?2004h")?; // enable bracketed paste mode
 
+  let mut screensaver_deadline: Option<Instant> = None;
+
   // Main poll loop
   loop {
     write_meta(|m| {
@@ -221,7 +270,7 @@ fn shed_interactive(args: ShedArgs) -> ShResult<()> {
     while signals_pending() {
       if let Err(e) = check_signals() {
         match e.kind() {
-          ShErrKind::ClearReadline => {
+          ShErrKind::Interrupt => {
             // We got Ctrl+C - clear current input and redraw
             readline.reset_active_widget(false)?;
           }
@@ -247,22 +296,71 @@ fn shed_interactive(args: ShedArgs) -> ShResult<()> {
       readline.prompt_mut().refresh();
     }
 
+    if GOT_SIGUSR1.swap(false, Ordering::SeqCst) {
+      log::info!("SIGUSR1 received: refreshing readline state");
+      readline.mark_dirty();
+      readline.prompt_mut().refresh();
+    }
+
     readline.print_line(false)?;
 
-    // Poll for stdin input
+    // Poll for
+    // stdin input
     let mut fds = [PollFd::new(
       unsafe { BorrowedFd::borrow_raw(*TTY_FILENO) },
       PollFlags::POLLIN,
     )];
 
+    let mut exec_if_timeout = None;
+
     let timeout = if readline.pending_keymap.is_empty() {
+      let screensaver_cmd = read_shopts(|o| o.prompt.screensaver_cmd.clone())
+        .trim()
+        .to_string();
+      let screensaver_idle_time = read_shopts(|o| o.prompt.screensaver_idle_time);
+      if screensaver_idle_time > 0 && !screensaver_cmd.is_empty() {
+        exec_if_timeout = Some(screensaver_cmd);
+        if screensaver_deadline.is_none() {
+          screensaver_deadline = Some(Instant::now() + Duration::from_secs(screensaver_idle_time as u64));
+        }
+				// We unfortunately cant just set the PollTimeout to use 'idle_time * 1000' as the timeout
+				// because u16 overflows after 65 seconds (65535 ms).
+				// So we set a one second timeout and check against the Instant in 'screensaver_deadline'
+        PollTimeout::from(1000u16)
+      } else {
+        screensaver_deadline = None;
         PollTimeout::MAX
+      }
     } else {
       PollTimeout::from(1000u16)
     };
 
     match poll(&mut fds, timeout) {
-      Ok(_) => {}
+      Ok(0) => {
+        // We timed out.
+        if let Some(cmd) = exec_if_timeout
+				&& screensaver_deadline.is_some_and(|d| Instant::now() >= d) {
+          screensaver_deadline = None;
+          let prepared = ReadlineEvent::Line(cmd.clone());
+          let saved_hist_opt = read_shopts(|o| o.core.auto_hist);
+          let _guard = scopeguard::guard(saved_hist_opt, |opt| {
+            write_shopts(|o| o.core.auto_hist = opt);
+          });
+          write_shopts(|o| o.core.auto_hist = false); // don't save screensaver command to history
+					let pre_cmds = read_logic(|l| l.get_autocmds(AutoCmdKind::OnScreensaverExec));
+					pre_cmds.exec_with(&cmd);
+
+          let res = handle_readline_event(&mut readline, Ok(prepared))?;
+
+					let post_cmds = read_logic(|l| l.get_autocmds(AutoCmdKind::OnScreensaverReturn));
+					post_cmds.exec_with(&cmd);
+
+					match res {
+            true => return Ok(()),
+            false => continue,
+          }
+        }
+      }
       Err(Errno::EINTR) => {
         // Interrupted by signal, loop back to handle it
         continue;
@@ -271,6 +369,7 @@ fn shed_interactive(args: ShedArgs) -> ShResult<()> {
         eprintln!("poll error: {e}");
         break;
       }
+      Ok(_) => {}
     }
 
     // Timeout — resolve pending keymap ambiguity
@@ -333,6 +432,7 @@ fn shed_interactive(args: ShedArgs) -> ShResult<()> {
         }
         Ok(n) => {
           readline.feed_bytes(&buffer[..n]);
+          screensaver_deadline = None;
         }
         Err(Errno::EINTR) => {
           // Interrupted, continue to handle signals
@@ -372,6 +472,10 @@ fn handle_readline_event(readline: &mut ShedVi, event: ShResult<ReadlineEvent>)
       }) {
         // CleanExit signals an intentional shell exit; any other error is printed.
         match e.kind() {
+          ShErrKind::Interrupt => {
+            // We got Ctrl+C during command execution
+            // Just fall through here
+          }
           ShErrKind::CleanExit(code) => {
             QUIT_CODE.store(*code, Ordering::SeqCst);
             return Ok(true);

src/parse/execute.rs

@@ -8,7 +8,30 @@ use ariadne::Fmt;
 
 use crate::{
   builtin::{
-    alias::{alias, unalias}, arrops::{arr_fpop, arr_fpush, arr_pop, arr_push, arr_rotate}, autocmd::autocmd, cd::cd, complete::{compgen_builtin, complete_builtin}, dirstack::{dirs, popd, pushd}, echo::echo, eval, exec, flowctl::flowctl, getopts::getopts, intro, jobctl::{self, JobBehavior, continue_job, disown, jobs}, keymap, map, pwd::pwd, read::{self, read_builtin}, resource::{ulimit, umask_builtin}, shift::shift, shopt::shopt, source::source, test::double_bracket_test, trap::{TrapTarget, trap}, varcmds::{export, local, readonly, unset}
+    alias::{alias, unalias},
+    arrops::{arr_fpop, arr_fpush, arr_pop, arr_push, arr_rotate},
+    autocmd::autocmd,
+    cd::cd,
+    complete::{compgen_builtin, complete_builtin},
+    dirstack::{dirs, popd, pushd},
+    echo::echo,
+    eval, exec,
+    flowctl::flowctl,
+    getopts::getopts,
+    help::help,
+    intro,
+    jobctl::{self, JobBehavior, continue_job, disown, jobs},
+    keymap, map,
+    pwd::pwd,
+    read::{self, read_builtin},
+    resource::{ulimit, umask_builtin},
+    seek::seek,
+    shift::shift,
+    shopt::shopt,
+    source::source,
+    test::double_bracket_test,
+    trap::{TrapTarget, trap},
+    varcmds::{export, local, readonly, unset},
   },
   expand::{expand_aliases, expand_case_pattern, glob_to_regex},
   jobs::{ChildProc, JobStack, attach_tty, dispatch_job},
@@ -19,6 +42,7 @@ use crate::{
   },
   prelude::*,
   procio::{IoMode, IoStack, PipeGenerator},
+  signal::{check_signals, signals_pending},
   state::{
     self, ShFunc, VarFlags, VarKind, read_logic, read_shopts, write_jobs, write_logic, write_vars,
   },
@@ -136,10 +160,15 @@ pub fn exec_dash_c(input: String) -> ShResult<()> {
   if nodes.len() == 1 {
     let is_single_cmd = match &nodes[0].class {
       NdRule::Command { .. } => true,
-      NdRule::Pipeline { cmds } => cmds.len() == 1 && matches!(cmds[0].class, NdRule::Command { .. }),
+      NdRule::Pipeline { cmds } => {
+        cmds.len() == 1 && matches!(cmds[0].class, NdRule::Command { .. })
+      }
       NdRule::Conjunction { elements } => {
-        elements.len() == 1 && match &elements[0].cmd.class {
+        elements.len() == 1
-          NdRule::Pipeline { cmds } => cmds.len() == 1 && matches!(cmds[0].class, NdRule::Command { .. }),
+          && match &elements[0].cmd.class {
+            NdRule::Pipeline { cmds } => {
+              cmds.len() == 1 && matches!(cmds[0].class, NdRule::Command { .. })
+            }
             NdRule::Command { .. } => true,
             _ => false,
           }
@@ -151,8 +180,12 @@ pub fn exec_dash_c(input: String) -> ShResult<()> {
       let mut node = nodes.remove(0);
       loop {
         match node.class {
-          NdRule::Conjunction { mut elements } => { node = *elements.remove(0).cmd; }
+          NdRule::Conjunction { mut elements } => {
-          NdRule::Pipeline { mut cmds } => { node = cmds.remove(0); }
+            node = *elements.remove(0).cmd;
+          }
+          NdRule::Pipeline { mut cmds } => {
+            node = cmds.remove(0);
+          }
           NdRule::Command { .. } => break,
           _ => break,
         }
@@ -241,6 +274,13 @@ impl Dispatcher {
     Ok(())
   }
   pub fn dispatch_node(&mut self, node: Node) -> ShResult<()> {
+    while signals_pending() {
+      // If we have received SIGINT,
+      // this will stop the execution here
+      // and propagate back to the functions in main.rs
+      check_signals()?;
+    }
+
     match node.class {
       NdRule::Conjunction { .. } => self.exec_conjunction(node)?,
       NdRule::Pipeline { .. } => self.exec_pipeline(node)?,
@@ -250,6 +290,7 @@ impl Dispatcher {
       NdRule::CaseNode { .. } => self.exec_case(node)?,
       NdRule::BraceGrp { .. } => self.exec_brc_grp(node)?,
       NdRule::FuncDef { .. } => self.exec_func_def(node)?,
+      NdRule::Negate { .. } => self.exec_negated(node)?,
       NdRule::Command { .. } => self.dispatch_cmd(node)?,
       NdRule::Test { .. } => self.exec_test(node)?,
       _ => unreachable!(),
@@ -257,6 +298,15 @@ impl Dispatcher {
     Ok(())
   }
   pub fn dispatch_cmd(&mut self, node: Node) -> ShResult<()> {
+    let (line, _) = node.get_span().clone().line_and_col();
+    write_vars(|v| {
+      v.set_var(
+        "LINENO",
+        VarKind::Str((line + 1).to_string()),
+        VarFlags::NONE,
+      )
+    })?;
+
     let Some(cmd) = node.get_command() else {
       return self.exec_cmd(node); // Argv is empty, probably an assignment
     };
@@ -284,30 +334,35 @@ impl Dispatcher {
       self.exec_cmd(node)
     }
   }
+  pub fn exec_negated(&mut self, node: Node) -> ShResult<()> {
+    let NdRule::Negate { cmd } = node.class else {
+      unreachable!()
+    };
+    self.dispatch_node(*cmd)?;
+    let status = state::get_status();
+    state::set_status(if status == 0 { 1 } else { 0 });
+
+    Ok(())
+  }
   pub fn exec_conjunction(&mut self, conjunction: Node) -> ShResult<()> {
     let NdRule::Conjunction { elements } = conjunction.class else {
       unreachable!()
     };
 
     let mut elem_iter = elements.into_iter();
+    let mut skip = false;
     while let Some(element) = elem_iter.next() {
       let ConjunctNode { cmd, operator } = element;
+      if !skip {
         self.dispatch_node(*cmd)?;
+      }
 
       let status = state::get_status();
-      match operator {
+      skip = match operator {
-        ConjunctOp::And => {
+        ConjunctOp::And => status != 0,
-          if status != 0 {
+        ConjunctOp::Or => status == 0,
-            break;
-          }
-        }
-        ConjunctOp::Or => {
-          if status == 0 {
-            break;
-          }
-        }
         ConjunctOp::Null => break,
-      }
+      };
     }
     Ok(())
   }
@@ -327,7 +382,11 @@ impl Dispatcher {
     };
     let body_span = body.get_span();
     let body = body_span.as_str().to_string();
-    let name = name.span.as_str().strip_suffix("()").unwrap();
+    let name = name
+      .span
+      .as_str()
+      .strip_suffix("()")
+      .unwrap_or(name.span.as_str());
 
     if KEYWORDS.contains(&name) {
       return Err(ShErr::at(
@@ -578,6 +637,7 @@ impl Dispatcher {
             }
           }
         } else {
+          state::set_status(0);
           break;
         }
       }
@@ -714,10 +774,14 @@ impl Dispatcher {
         }
       }
 
-      if !matched && !else_block.is_empty() {
+      if !matched {
+        if !else_block.is_empty() {
           for node in else_block {
             s.dispatch_node(node)?;
           }
+        } else {
+          state::set_status(0);
+        }
       }
 
       Ok(())
@@ -749,7 +813,18 @@ impl Dispatcher {
     if cmds.len() == 1 {
       self.fg_job = !is_bg && self.interactive;
       let cmd = cmds.into_iter().next().unwrap();
+      if is_bg && !matches!(cmd.class, NdRule::Command { .. }) {
+        self.run_fork(
+          &cmd.get_command().map(|t| t.to_string()).unwrap_or_default(),
+          |s| {
+            if let Err(e) = s.dispatch_node(cmd) {
+              e.print_error();
+            }
+          },
+        )?;
+      } else {
         self.dispatch_node(cmd)?;
+      }
 
       // Give the pipeline terminal control as soon as the first child
       // establishes the PGID, so later children (e.g. nvim) don't get
@@ -822,7 +897,10 @@ impl Dispatcher {
 
     if fork_builtins {
       log::trace!("Forking builtin: {}", cmd_raw);
-      let _guard = self.io_stack.pop_frame().redirect()?;
+      let guard = self.io_stack.pop_frame().redirect()?;
+      if cmd_raw.as_str() == "exec" {
+        guard.persist();
+      }
       self.run_fork(&cmd_raw, |s| {
         if let Err(e) = s.dispatch_builtin(cmd) {
           e.print_error();
@@ -947,6 +1025,8 @@ impl Dispatcher {
       "autocmd" => autocmd(cmd),
       "ulimit" => ulimit(cmd),
       "umask" => umask_builtin(cmd),
+      "seek" => seek(cmd),
+      "help" => help(cmd),
       "true" | ":" => {
         state::set_status(0);
         Ok(())
@@ -1084,6 +1164,7 @@ impl Dispatcher {
     match unsafe { fork()? } {
       ForkResult::Child => {
         let _ = setpgid(Pid::from_raw(0), existing_pgid.unwrap_or(Pid::from_raw(0)));
+        self.interactive = false;
         f(self);
         exit(state::get_status())
       }
@@ -1195,3 +1276,202 @@ pub fn is_func(tk: Option<Tk>) -> bool {
 pub fn is_subsh(tk: Option<Tk>) -> bool {
   tk.is_some_and(|tk| tk.flags.contains(TkFlags::IS_SUBSH))
 }
+
+#[cfg(test)]
+mod tests {
+  use crate::state;
+  use crate::testutil::{TestGuard, test_input};
+
+  // ===================== while/until status =====================
+
+  #[test]
+  fn while_loop_status_zero_after_completion() {
+    let _g = TestGuard::new();
+    test_input("while false; do :; done").unwrap();
+    assert_eq!(state::get_status(), 0);
+  }
+
+  #[test]
+  fn while_loop_status_zero_after_iterations() {
+    let _g = TestGuard::new();
+    test_input("X=0; while [[ $X -lt 3 ]]; do X=$((X+1)); done").unwrap();
+    assert_eq!(state::get_status(), 0);
+  }
+
+  #[test]
+  fn until_loop_status_zero_after_completion() {
+    let _g = TestGuard::new();
+    test_input("until true; do :; done").unwrap();
+    assert_eq!(state::get_status(), 0);
+  }
+
+  #[test]
+  fn until_loop_status_zero_after_iterations() {
+    let _g = TestGuard::new();
+    test_input("X=3; until [[ $X -le 0 ]]; do X=$((X-1)); done").unwrap();
+    assert_eq!(state::get_status(), 0);
+  }
+
+  #[test]
+  fn while_break_preserves_status() {
+    let _g = TestGuard::new();
+    test_input("while true; do break; done").unwrap();
+    assert_eq!(state::get_status(), 0);
+  }
+
+  #[test]
+  fn while_body_status_propagates() {
+    let _g = TestGuard::new();
+    test_input("X=0; while [[ $X -lt 1 ]]; do X=$((X+1)); false; done").unwrap();
+    // Loop body ended with `false` (status 1), but the loop itself
+    // completed normally when the condition failed, so status should be 0
+    assert_eq!(state::get_status(), 0);
+  }
+
+  // ===================== if/elif/else status =====================
+
+  #[test]
+  fn if_true_body_status() {
+    let _g = TestGuard::new();
+    test_input("if true; then echo ok; fi").unwrap();
+    assert_eq!(state::get_status(), 0);
+  }
+
+  #[test]
+  fn if_false_no_else_status() {
+    let _g = TestGuard::new();
+    test_input("if false; then echo ok; fi").unwrap();
+    // No branch taken, POSIX says status is 0
+    assert_eq!(state::get_status(), 0);
+  }
+
+  #[test]
+  fn if_else_branch_status() {
+    let _g = TestGuard::new();
+    test_input("if false; then true; else false; fi").unwrap();
+    assert_eq!(state::get_status(), 1);
+  }
+
+  // ===================== for loop status =====================
+
+  #[test]
+  fn for_loop_empty_list_status() {
+    let _g = TestGuard::new();
+    test_input("for x in; do echo $x; done").unwrap();
+    assert_eq!(state::get_status(), 0);
+  }
+
+  #[test]
+  fn for_loop_body_status() {
+    let _g = TestGuard::new();
+    test_input("for x in a b c; do true; done").unwrap();
+    assert_eq!(state::get_status(), 0);
+  }
+
+  // ===================== case status =====================
+
+  #[test]
+  fn case_match_status() {
+    let _g = TestGuard::new();
+    test_input("case foo in foo) true;; esac").unwrap();
+    assert_eq!(state::get_status(), 0);
+  }
+
+  #[test]
+  fn case_no_match_status() {
+    let _g = TestGuard::new();
+    test_input("case foo in bar) true;; esac").unwrap();
+    assert_eq!(state::get_status(), 0);
+  }
+
+  // ===================== other stuff =====================
+
+  #[test]
+  fn for_loop_var_zip() {
+    let g = TestGuard::new();
+    test_input("for a b in 1 2 3 4 5 6; do echo $a $b; done").unwrap();
+    let out = g.read_output();
+    assert_eq!(out, "1 2\n3 4\n5 6\n");
+  }
+
+  #[test]
+  fn for_loop_unsets_zipped() {
+    let g = TestGuard::new();
+    test_input("for a b c d in 1 2 3 4 5 6; do echo $a $b $c $d; done").unwrap();
+    let out = g.read_output();
+    assert_eq!(out, "1 2 3 4\n5 6\n");
+  }
+
+  // ===================== negation (!) status =====================
+
+  #[test]
+  fn negate_true() {
+    let _g = TestGuard::new();
+    test_input("! true").unwrap();
+    assert_eq!(state::get_status(), 1);
+  }
+
+  #[test]
+  fn negate_false() {
+    let _g = TestGuard::new();
+    test_input("! false").unwrap();
+    assert_eq!(state::get_status(), 0);
+  }
+
+  #[test]
+  fn double_negate_true() {
+    let _g = TestGuard::new();
+    test_input("! ! true").unwrap();
+    assert_eq!(state::get_status(), 0);
+  }
+
+  #[test]
+  fn double_negate_false() {
+    let _g = TestGuard::new();
+    test_input("! ! false").unwrap();
+    assert_eq!(state::get_status(), 1);
+  }
+
+  #[test]
+  fn negate_pipeline_last_cmd() {
+    let _g = TestGuard::new();
+    // pipeline status = last cmd (false) = 1, negated → 0
+    test_input("! true | false").unwrap();
+    assert_eq!(state::get_status(), 0);
+  }
+
+  #[test]
+  fn negate_pipeline_last_cmd_true() {
+    let _g = TestGuard::new();
+    // pipeline status = last cmd (true) = 0, negated → 1
+    test_input("! false | true").unwrap();
+    assert_eq!(state::get_status(), 1);
+  }
+
+  #[test]
+  fn negate_in_conjunction() {
+    let _g = TestGuard::new();
+    // ! binds to pipeline, not conjunction: (! (true && false)) && true
+    test_input("! (true && false) && true").unwrap();
+    assert_eq!(state::get_status(), 0);
+  }
+
+  #[test]
+  fn negate_in_if_condition() {
+    let g = TestGuard::new();
+    test_input("if ! false; then echo yes; fi").unwrap();
+    assert_eq!(state::get_status(), 0);
+    assert_eq!(g.read_output(), "yes\n");
+  }
+
+  #[test]
+  fn empty_var_in_test() {
+    let _g = TestGuard::new();
+    // POSIX specifies that a quoted unset variable expands to an empty string, so the shell actually sees `[ -n "" ]`, which returns false
+    test_input("[ -n \"$EMPTYVAR_PROBABLY_NOT_SET_TO_ANYTHING\" ]").unwrap();
+    assert_eq!(state::get_status(), 1);
+    // Without quotes, word splitting causes an empty var to be removed entirely, so the shell actually sees `[ -n ]`, testing the value of ']', which returns true
+    test_input("[ -n $EMPTYVAR_PROBABLY_NOT_SET_TO_ANYTHING ]").unwrap();
+    assert_eq!(state::get_status(), 0);
+  }
+}

src/parse/lex.rs

@@ -17,9 +17,9 @@ use crate::{
   },
 };
 
-pub const KEYWORDS: [&str; 16] = [
+pub const KEYWORDS: [&str; 17] = [
   "if", "then", "elif", "else", "fi", "while", "until", "select", "for", "in", "do", "done",
-  "case", "esac", "[[", "]]",
+  "case", "esac", "[[", "]]", "!",
 ];
 
 pub const OPENERS: [&str; 6] = ["if", "while", "until", "for", "select", "case"];
@@ -166,6 +166,7 @@ pub enum TkRule {
   ErrPipe,
   And,
   Or,
+  Bang,
   Bg,
   Sep,
   Redir,
@@ -216,6 +217,31 @@ impl Tk {
     };
     self.span.as_str().trim() == ";;"
   }
+
+  pub fn is_opener(&self) -> bool {
+    OPENERS.contains(&self.as_str())
+      || matches!(self.class, TkRule::BraceGrpStart)
+      || matches!(self.class, TkRule::CasePattern)
+  }
+  pub fn is_closer(&self) -> bool {
+    matches!(self.as_str(), "fi" | "done" | "esac")
+      || self.has_double_semi()
+      || matches!(self.class, TkRule::BraceGrpEnd)
+  }
+
+  pub fn is_closer_for(&self, other: &Tk) -> bool {
+    if (matches!(other.class, TkRule::BraceGrpStart) && matches!(self.class, TkRule::BraceGrpEnd))
+      || (matches!(other.class, TkRule::CasePattern) && self.has_double_semi())
+    {
+      return true;
+    }
+    match other.as_str() {
+      "for" | "while" | "until" => matches!(self.as_str(), "done"),
+      "if" => matches!(self.as_str(), "fi"),
+      "case" => matches!(self.as_str(), "esac"),
+      _ => false,
+    }
+  }
 }
 
 impl Display for Tk {
@@ -240,19 +266,12 @@ bitflags! {
     const ASSIGN       = 0b0000000001000000;
     const BUILTIN      = 0b0000000010000000;
     const IS_PROCSUB   = 0b0000000100000000;
+    const IS_HEREDOC   = 0b0000001000000000;
+    const LIT_HEREDOC  = 0b0000010000000000;
+    const TAB_HEREDOC  = 0b0000100000000000;
   }
 }
 
-pub struct LexStream {
-  source: Arc<String>,
-  pub cursor: usize,
-  pub name: String,
-  quote_state: QuoteState,
-  brc_grp_depth: usize,
-  brc_grp_start: Option<usize>,
-  flags: LexFlags,
-}
-
 bitflags! {
   #[derive(Debug, Clone, Copy)]
   pub struct LexFlags: u32 {
@@ -271,7 +290,6 @@ bitflags! {
     /// The lexer has no more tokens to produce
     const STALE          = 0b0001000000;
     const EXPECTING_IN   = 0b0010000000;
-    const IN_CASE        = 0b0100000000;
   }
 }
 
@@ -295,6 +313,18 @@ pub fn clean_input(input: &str) -> String {
   output
 }
 
+pub struct LexStream {
+  source: Arc<String>,
+  pub cursor: usize,
+  pub name: String,
+  quote_state: QuoteState,
+  brc_grp_depth: usize,
+  brc_grp_start: Option<usize>,
+  case_depth: usize,
+  heredoc_skip: Option<usize>,
+  flags: LexFlags,
+}
+
 impl LexStream {
   pub fn new(source: Arc<String>, flags: LexFlags) -> Self {
     let flags = flags | LexFlags::FRESH | LexFlags::NEXT_IS_CMD;
@@ -306,6 +336,8 @@ impl LexStream {
       quote_state: QuoteState::default(),
       brc_grp_depth: 0,
       brc_grp_start: None,
+      heredoc_skip: None,
+      case_depth: 0,
     }
   }
   /// Returns a slice of the source input using the given range
@@ -365,7 +397,7 @@ impl LexStream {
   }
   pub fn read_redir(&mut self) -> Option<ShResult<Tk>> {
     assert!(self.cursor <= self.source.len());
-    let slice = self.slice(self.cursor..)?;
+    let slice = self.slice(self.cursor..)?.to_string();
     let mut pos = self.cursor;
     let mut chars = slice.chars().peekable();
     let mut tk = Tk::default();
@@ -377,20 +409,38 @@ impl LexStream {
             return None; // It's a process sub
           }
           pos += 1;
+          if let Some('|') = chars.peek() {
+            // noclobber force '>|'
+            chars.next();
+            pos += 1;
+            tk = self.get_token(self.cursor..pos, TkRule::Redir);
+            break;
+          }
+
           if let Some('>') = chars.peek() {
             chars.next();
             pos += 1;
           }
-          if let Some('&') = chars.peek() {
+          let Some('&') = chars.peek() else {
+            tk = self.get_token(self.cursor..pos, TkRule::Redir);
+            break;
+          };
+
           chars.next();
           pos += 1;
 
           let mut found_fd = false;
+          if chars.peek().is_some_and(|ch| *ch == '-') {
+            chars.next();
+            found_fd = true;
+            pos += 1;
+          } else {
             while chars.peek().is_some_and(|ch| ch.is_ascii_digit()) {
               chars.next();
               found_fd = true;
               pos += 1;
             }
+          }
 
           if !found_fd && !self.flags.contains(LexFlags::LEX_UNFINISHED) {
             let span_start = self.cursor;
@@ -404,10 +454,6 @@ impl LexStream {
             tk = self.get_token(self.cursor..pos, TkRule::Redir);
             break;
           }
-          } else {
-            tk = self.get_token(self.cursor..pos, TkRule::Redir);
-            break;
-          }
         }
         '<' => {
           if chars.peek() == Some(&'(') {
@@ -415,14 +461,94 @@ impl LexStream {
           }
           pos += 1;
 
-          for _ in 0..2 {
+          match chars.peek() {
-            if let Some('<') = chars.peek() {
+            Some('<') => {
               chars.next();
               pos += 1;
+
+              match chars.peek() {
+                Some('<') => {
+                  chars.next();
+                  pos += 1;
+                }
+
+                Some(ch) => {
+                  let mut ch = *ch;
+                  while is_field_sep(ch) {
+                    let Some(next_ch) = chars.next() else {
+                      // Incomplete input — fall through to emit << as Redir
+                      break;
+                    };
+                    pos += next_ch.len_utf8();
+                    ch = next_ch;
+                  }
+
+                  if is_field_sep(ch) {
+                    // Ran out of input while skipping whitespace — fall through
                   } else {
+                    let saved_cursor = self.cursor;
+                    match self.read_heredoc(pos) {
+                      Ok(Some(heredoc_tk)) => {
+                        // cursor is set to after the delimiter word;
+                        // heredoc_skip is set to after the body
+                        pos = self.cursor;
+                        self.cursor = saved_cursor;
+                        tk = heredoc_tk;
+                        break;
+                      }
+                      Ok(None) => {
+                        // Incomplete heredoc — restore cursor and fall through
+                        self.cursor = saved_cursor;
+                      }
+                      Err(e) => return Some(Err(e)),
+                    }
+                  }
+                }
+                _ => {
+                  // No delimiter yet — input is incomplete
+                  // Fall through to emit the << as a Redir token
+                }
+              }
+            }
+            Some('>') => {
+              chars.next();
+              pos += 1;
+              tk = self.get_token(self.cursor..pos, TkRule::Redir);
+              break;
+            }
+            Some('&') => {
+              chars.next();
+              pos += 1;
+
+              let mut found_fd = false;
+              if chars.peek().is_some_and(|ch| *ch == '-') {
+                chars.next();
+                found_fd = true;
+                pos += 1;
+              } else {
+                while chars.peek().is_some_and(|ch| ch.is_ascii_digit()) {
+                  chars.next();
+                  found_fd = true;
+                  pos += 1;
+                }
+              }
+
+              if !found_fd && !self.flags.contains(LexFlags::LEX_UNFINISHED) {
+                let span_start = self.cursor;
+                self.cursor = pos;
+                return Some(Err(ShErr::at(
+                  ShErrKind::ParseErr,
+                  Span::new(span_start..pos, self.source.clone()),
+                  "Invalid redirection",
+                )));
+              } else {
+                tk = self.get_token(self.cursor..pos, TkRule::Redir);
                 break;
               }
             }
+            _ => {}
+          }
+
           tk = self.get_token(self.cursor..pos, TkRule::Redir);
           break;
         }
@@ -446,6 +572,133 @@ impl LexStream {
     self.cursor = pos;
     Some(Ok(tk))
   }
+  pub fn read_heredoc(&mut self, mut pos: usize) -> ShResult<Option<Tk>> {
+    let slice = self.slice(pos..).unwrap_or_default().to_string();
+    let mut chars = slice.chars();
+    let mut delim = String::new();
+    let mut flags = TkFlags::empty();
+    let mut first_char = true;
+    // Parse the delimiter word, stripping quotes
+    while let Some(ch) = chars.next() {
+      match ch {
+        '-' if first_char => {
+          pos += 1;
+          flags |= TkFlags::TAB_HEREDOC;
+        }
+        '\"' => {
+          pos += 1;
+          self.quote_state.toggle_double();
+          flags |= TkFlags::LIT_HEREDOC;
+        }
+        '\'' => {
+          pos += 1;
+          self.quote_state.toggle_single();
+          flags |= TkFlags::LIT_HEREDOC;
+        }
+        _ if self.quote_state.in_quote() => {
+          pos += ch.len_utf8();
+          delim.push(ch);
+        }
+        ch if is_hard_sep(ch) => {
+          break;
+        }
+        ch => {
+          pos += ch.len_utf8();
+          delim.push(ch);
+        }
+      }
+      first_char = false;
+    }
+
+    // pos is now right after the delimiter word — this is where
+    // the cursor should return so the rest of the line gets lexed
+    let cursor_after_delim = pos;
+
+    // Re-slice from cursor_after_delim so iterator and pos are in sync
+    // (the old chars iterator consumed the hard_sep without advancing pos)
+    let rest = self
+      .slice(cursor_after_delim..)
+      .unwrap_or_default()
+      .to_string();
+    let mut chars = rest.chars();
+
+    // Scan forward to the newline (or use heredoc_skip from a previous heredoc)
+    let body_start = if let Some(skip) = self.heredoc_skip {
+      // A previous heredoc on this line already read its body;
+      // our body starts where that one ended
+      let skip_offset = skip - cursor_after_delim;
+      for _ in 0..skip_offset {
+        chars.next();
+      }
+      skip
+    } else {
+      // Skip the rest of the current line to find where the body begins
+      let mut scan = pos;
+      let mut found_newline = false;
+      while let Some(ch) = chars.next() {
+        scan += ch.len_utf8();
+        if ch == '\n' {
+          found_newline = true;
+          break;
+        }
+      }
+      if !found_newline {
+        if self.flags.contains(LexFlags::LEX_UNFINISHED) {
+          return Ok(None);
+        } else {
+          return Err(ShErr::at(
+            ShErrKind::ParseErr,
+            Span::new(pos..pos, self.source.clone()),
+            "Heredoc delimiter not found",
+          ));
+        }
+      }
+      scan
+    };
+
+    pos = body_start;
+    let start = pos;
+
+    // Read lines until we find one that matches the delimiter exactly
+    let mut line = String::new();
+    let mut line_start = pos;
+    while let Some(ch) = chars.next() {
+      pos += ch.len_utf8();
+      if ch == '\n' {
+        let trimmed = line.trim_end_matches('\r');
+        if trimmed == delim {
+          let mut tk = self.get_token(start..line_start, TkRule::Redir);
+          tk.flags |= TkFlags::IS_HEREDOC | flags;
+          self.heredoc_skip = Some(pos);
+          self.cursor = cursor_after_delim;
+          return Ok(Some(tk));
+        }
+        line.clear();
+        line_start = pos;
+      } else {
+        line.push(ch);
+      }
+    }
+    // Check the last line (no trailing newline)
+    let trimmed = line.trim_end_matches('\r');
+    if trimmed == delim {
+      let mut tk = self.get_token(start..line_start, TkRule::Redir);
+      tk.flags |= TkFlags::IS_HEREDOC | flags;
+      self.heredoc_skip = Some(pos);
+      self.cursor = cursor_after_delim;
+      return Ok(Some(tk));
+    }
+
+    if !self.flags.contains(LexFlags::LEX_UNFINISHED) {
+      Err(ShErr::at(
+        ShErrKind::ParseErr,
+        Span::new(start..pos, self.source.clone()),
+        format!("Heredoc delimiter '{}' not found", delim),
+      ))
+    } else {
+      Ok(None)
+    }
+  }
   pub fn read_string(&mut self) -> ShResult<Tk> {
     assert!(self.cursor <= self.source.len());
     let slice = self.slice_from_cursor().unwrap().to_string();
@@ -453,7 +706,7 @@ impl LexStream {
     let mut chars = slice.chars().peekable();
     let can_be_subshell = chars.peek() == Some(&'(');
 
-    if self.flags.contains(LexFlags::IN_CASE)
+    if self.case_depth > 0
       && let Some(count) = case_pat_lookahead(chars.clone())
     {
       pos += count;
@@ -623,6 +876,16 @@ impl LexStream {
             ));
           }
         }
+        '(' if can_be_subshell && chars.peek() == Some(&')') => {
+          // standalone "()" — function definition marker
+          pos += 2;
+          chars.next();
+          let mut tk = self.get_token(self.cursor..pos, TkRule::Str);
+          tk.mark(TkFlags::KEYWORD);
+          self.cursor = pos;
+          self.set_next_is_cmd(true);
+          return Ok(tk);
+        }
         '(' if self.next_is_cmd() && can_be_subshell => {
           pos += 1;
           let mut paren_count = 1;
@@ -731,7 +994,7 @@ impl LexStream {
         "case" | "select" | "for" => {
           new_tk.mark(TkFlags::KEYWORD);
           self.flags |= LexFlags::EXPECTING_IN;
-          self.flags |= LexFlags::IN_CASE;
+          self.case_depth += 1;
           self.set_next_is_cmd(false);
         }
         "in" if self.flags.contains(LexFlags::EXPECTING_IN) => {
@@ -739,8 +1002,8 @@ impl LexStream {
           self.flags &= !LexFlags::EXPECTING_IN;
         }
         _ if is_keyword(text) => {
-          if text == "esac" && self.flags.contains(LexFlags::IN_CASE) {
+          if text == "esac" && self.case_depth > 0 {
-            self.flags &= !LexFlags::IN_CASE;
+            self.case_depth -= 1;
           }
           new_tk.mark(TkFlags::KEYWORD);
         }
@@ -843,10 +1106,19 @@ impl Iterator for LexStream {
 
     let token = match get_char(&self.source, self.cursor).unwrap() {
       '\r' | '\n' | ';' => {
+        let ch = get_char(&self.source, self.cursor).unwrap();
         let ch_idx = self.cursor;
         self.cursor += 1;
         self.set_next_is_cmd(true);
 
+        // If a heredoc was parsed on this line, skip past the body
+        // Only on newline — ';' is a command separator within the same line
+        if (ch == '\n' || ch == '\r')
+          && let Some(skip) = self.heredoc_skip.take()
+        {
+          self.cursor = skip;
+        }
+
         while let Some(ch) = get_char(&self.source, self.cursor) {
           match ch {
             '\\' if get_char(&self.source, self.cursor + 1) == Some('\n') => {
@@ -881,6 +1153,14 @@ impl Iterator for LexStream {
           return self.next();
         }
       }
+      '!' if self.next_is_cmd() => {
+        self.cursor += 1;
+        let tk_type = TkRule::Bang;
+
+        let mut tk = self.get_token((self.cursor - 1)..self.cursor, tk_type);
+        tk.flags |= TkFlags::KEYWORD;
+        tk
+      }
       '|' => {
         let ch_idx = self.cursor;
         self.cursor += 1;

src/prelude.rs

@@ -19,7 +19,7 @@ pub use std::os::unix::io::{AsRawFd, BorrowedFd, FromRawFd, IntoRawFd, OwnedFd,
 pub use bitflags::bitflags;
 pub use nix::{
   errno::Errno,
-  fcntl::{OFlag, open},
+  fcntl::{FcntlArg, OFlag, fcntl, open},
   libc::{self, STDERR_FILENO, STDIN_FILENO, STDOUT_FILENO},
   sys::{
     signal::{self, SigHandler, SigSet, SigmaskHow, Signal, kill, killpg, pthread_sigmask, signal},
@@ -33,5 +33,4 @@ pub use nix::{
   },
 };
 
-
 // Additional utilities, if needed, can be added here

src/procio.rs

@@ -8,15 +8,27 @@ use crate::{
   expand::Expander,
   libsh::{
     error::{ShErr, ShErrKind, ShResult},
+    sys::TTY_FILENO,
     utils::RedirVecUtils,
   },
-  parse::{Redir, RedirType, get_redir_file},
+  parse::{Redir, RedirType, get_redir_file, lex::TkFlags},
   prelude::*,
+  state,
 };
 
 // Credit to fish-shell for many of the implementation ideas present in this
 // module https://fishshell.com/
 
+/// Minimum fd number for shell-internal file descriptors.
+/// User-visible fds (0-9) are kept clear so `exec 3>&-` etc. work as expected.
+const MIN_INTERNAL_FD: RawFd = 10;
+
+/// Like `dup()`, but places the new fd at `MIN_INTERNAL_FD` or above so it
+/// doesn't collide with user-managed fds.
+fn dup_high(fd: RawFd) -> nix::Result<RawFd> {
+  fcntl(fd, FcntlArg::F_DUPFD_CLOEXEC(MIN_INTERNAL_FD))
+}
+
 #[derive(Clone, Debug)]
 pub enum IoMode {
   Fd {
@@ -37,8 +49,9 @@ pub enum IoMode {
     pipe: Arc<OwnedFd>,
   },
   Buffer {
+    tgt_fd: RawFd,
     buf: String,
-    pipe: Arc<OwnedFd>,
+    flags: TkFlags, // so we can see if its a heredoc or not
   },
   Close {
     tgt_fd: RawFd,
@@ -79,19 +92,37 @@ impl IoMode {
     if let IoMode::File { tgt_fd, path, mode } = self {
       let path_raw = path.as_os_str().to_str().unwrap_or_default().to_string();
 
-      let expanded_path = Expander::from_raw(&path_raw)?.expand()?.join(" "); // should just be one string, will have to find some way to handle a return of
+      let expanded_path = Expander::from_raw(&path_raw, TkFlags::empty())?
-      // multiple
+        .expand()?
+        .join(" "); // should just be one string, will have to find some way to handle a return of multiple paths
 
       let expanded_pathbuf = PathBuf::from(expanded_path);
 
       let file = get_redir_file(mode, expanded_pathbuf)?;
+      // Move the opened fd above the user-accessible range so it never
+      // collides with the target fd (e.g. `3>/tmp/foo` where open() returns 3,
+      // causing dup2(3,3) to be a no-op and then OwnedFd drop closes it).
+      let raw = file.as_raw_fd();
+      let high = fcntl(raw, FcntlArg::F_DUPFD_CLOEXEC(MIN_INTERNAL_FD)).map_err(ShErr::from)?;
+      drop(file); // closes the original low fd
       self = IoMode::OpenedFile {
         tgt_fd,
-        file: Arc::new(OwnedFd::from(file)),
+        file: Arc::new(unsafe { OwnedFd::from_raw_fd(high) }),
       }
     }
     Ok(self)
   }
+  pub fn buffer(tgt_fd: RawFd, buf: String, flags: TkFlags) -> ShResult<Self> {
+    Ok(Self::Buffer { tgt_fd, buf, flags })
+  }
+  pub fn loaded_pipe(tgt_fd: RawFd, buf: &[u8]) -> ShResult<Self> {
+    let (rpipe, wpipe) = nix::unistd::pipe()?;
+    write(wpipe, buf)?;
+    Ok(Self::Pipe {
+      tgt_fd,
+      pipe: rpipe.into(),
+    })
+  }
   pub fn get_pipes() -> (Self, Self) {
     let (rpipe, wpipe) = nix::unistd::pipe2(OFlag::O_CLOEXEC).unwrap();
     (
@@ -206,24 +237,107 @@ impl<'e> IoFrame {
     )
   }
   pub fn save(&'e mut self) {
-    let saved_in = dup(STDIN_FILENO).unwrap();
+    let saved_in = dup_high(STDIN_FILENO).unwrap();
-    let saved_out = dup(STDOUT_FILENO).unwrap();
+    let saved_out = dup_high(STDOUT_FILENO).unwrap();
-    let saved_err = dup(STDERR_FILENO).unwrap();
+    let saved_err = dup_high(STDERR_FILENO).unwrap();
     self.saved_io = Some(IoGroup(saved_in, saved_out, saved_err));
   }
   pub fn redirect(mut self) -> ShResult<RedirGuard> {
     self.save();
-    for redir in &mut self.redirs {
+    if let Err(e) = self.apply_redirs() {
-      let io_mode = &mut redir.io_mode;
+      // Restore saved fds before propagating the error so they don't leak.
-      if let IoMode::File { .. } = io_mode {
+      self.restore().ok();
-        *io_mode = io_mode.clone().open_file()?;
+      return Err(e);
-      };
-      let tgt_fd = io_mode.tgt_fd();
-      let src_fd = io_mode.src_fd();
-      dup2(src_fd, tgt_fd)?;
     }
     Ok(RedirGuard::new(self))
   }
+  fn apply_redirs(&mut self) -> ShResult<()> {
+    for redir in &mut self.redirs {
+      let io_mode = &mut redir.io_mode;
+      match io_mode {
+        IoMode::Close { tgt_fd } => {
+          if *tgt_fd == *TTY_FILENO {
+            // Don't let user close the shell's tty fd.
+            continue;
+          }
+          close(*tgt_fd).ok();
+          continue;
+        }
+        IoMode::File { .. } => match io_mode.clone().open_file() {
+          Ok(file) => *io_mode = file,
+          Err(e) => {
+            if let Some(span) = redir.span.as_ref() {
+              return Err(e.promote(span.clone()));
+            }
+            return Err(e);
+          }
+        },
+        IoMode::Buffer { tgt_fd, buf, flags } => {
+          let (rpipe, wpipe) = nix::unistd::pipe()?;
+          let mut text = if flags.contains(TkFlags::LIT_HEREDOC) {
+            buf.clone()
+          } else {
+            let words = Expander::from_raw(buf, *flags)?.expand()?;
+            if flags.contains(TkFlags::IS_HEREDOC) {
+              words.into_iter().next().unwrap_or_default()
+            } else {
+              let ifs = state::get_separator();
+              words.join(&ifs).trim().to_string() + "\n"
+            }
+          };
+          if flags.contains(TkFlags::TAB_HEREDOC) {
+            let lines = text.lines();
+            let mut min_tabs = usize::MAX;
+            for line in lines {
+              if line.is_empty() {
+                continue;
+              }
+              let line_len = line.len();
+              let after_strip = line.trim_start_matches('\t').len();
+              let delta = line_len - after_strip;
+              min_tabs = min_tabs.min(delta);
+            }
+            if min_tabs == usize::MAX {
+              // let's avoid possibly allocating a string with 18 quintillion tabs
+              min_tabs = 0;
+            }
+
+            if min_tabs > 0 {
+              let stripped = text
+                .lines()
+                .fold(vec![], |mut acc, ln| {
+                  if ln.is_empty() {
+                    acc.push("");
+                    return acc;
+                  }
+                  let stripped_ln = ln.strip_prefix(&"\t".repeat(min_tabs)).unwrap();
+                  acc.push(stripped_ln);
+                  acc
+                })
+                .join("\n");
+              text = stripped + "\n";
+            }
+          }
+          write(wpipe, text.as_bytes())?;
+          *io_mode = IoMode::Pipe {
+            tgt_fd: *tgt_fd,
+            pipe: rpipe.into(),
+          };
+        }
+        _ => {}
+      }
+      let tgt_fd = io_mode.tgt_fd();
+      let src_fd = io_mode.src_fd();
+      if let Err(e) = dup2(src_fd, tgt_fd) {
+        if let Some(span) = redir.span.as_ref() {
+          return Err(ShErr::from(e).promote(span.clone()));
+        } else {
+          return Err(e.into());
+        }
+      }
+    }
+    Ok(())
+  }
   pub fn restore(&mut self) -> ShResult<()> {
     if let Some(saved) = self.saved_io.take() {
       dup2(saved.0, STDIN_FILENO)?;
@@ -334,6 +448,8 @@ pub fn borrow_fd<'f>(fd: i32) -> BorrowedFd<'f> {
 }
 
 type PipeFrames = Map<PipeGenerator, fn((Option<Redir>, Option<Redir>)) -> IoFrame>;
+
+/// An iterator that lazily creates a specific number of pipes.
 pub struct PipeGenerator {
   num_cmds: usize,
   cursor: usize,
@@ -394,7 +510,9 @@ pub mod tests {
 
   #[test]
   fn pipeline_simple() {
-		if !has_cmd("sed") { return };
+    if !has_cmd("sed") {
+      return;
+    };
     let g = TestGuard::new();
 
     test_input("echo foo | sed 's/foo/bar/'").unwrap();
@@ -405,10 +523,9 @@ pub mod tests {
 
   #[test]
   fn pipeline_multi() {
-		if !has_cmds(&[
+    if !has_cmds(&["cut", "sed"]) {
-			"cut",
+      return;
-			"sed"
+    }
-		]) { return; }
     let g = TestGuard::new();
 
     test_input("echo foo bar baz | cut -d ' ' -f 2 | sed 's/a/A/'").unwrap();
@@ -419,10 +536,9 @@ pub mod tests {
 
   #[test]
   fn rube_goldberg_pipeline() {
-		if !has_cmds(&[
+    if !has_cmds(&["sed", "cat"]) {
-			"sed",
+      return;
-			"cat",
+    }
-		]) { return }
     let g = TestGuard::new();
 
     test_input("{ echo foo; echo bar } | if cat; then :; else echo failed; fi | (read line && echo $line | sed 's/foo/baz/'; sed 's/bar/buzz/')").unwrap();
@@ -437,7 +553,9 @@ pub mod tests {
 
     test_input("echo this is in a file > /tmp/simple_file_redir.txt").unwrap();
 
-		g.add_cleanup(|| { std::fs::remove_file("/tmp/simple_file_redir.txt").ok(); });
+    g.add_cleanup(|| {
+      std::fs::remove_file("/tmp/simple_file_redir.txt").ok();
+    });
     let contents = std::fs::read_to_string("/tmp/simple_file_redir.txt").unwrap();
 
     assert_eq!(contents, "this is in a file\n");
@@ -458,7 +576,9 @@ pub mod tests {
 
   #[test]
   fn input_redir() {
-		if !has_cmd("cat") { return; }
+    if !has_cmd("cat") {
+      return;
+    }
     let dir = tempfile::TempDir::new().unwrap();
     let path = dir.path().join("input.txt");
     std::fs::write(&path, "hello from file\n").unwrap();
@@ -487,7 +607,9 @@ pub mod tests {
 
   #[test]
   fn pipe_and_stderr() {
-		if !has_cmd("cat") { return; }
+    if !has_cmd("cat") {
+      return;
+    }
     let g = TestGuard::new();
 
     test_input("echo on stderr >&2 |& cat").unwrap();
@@ -511,7 +633,9 @@ pub mod tests {
 
   #[test]
   fn pipeline_preserves_exit_status() {
-		if !has_cmd("cat") { return; }
+    if !has_cmd("cat") {
+      return;
+    }
     let _g = TestGuard::new();
 
     test_input("false | cat").unwrap();
@@ -533,7 +657,11 @@ pub mod tests {
     let _g = TestGuard::new();
 
     // Redirect stdout to file, then dup stderr to stdout — both should go to file
-		test_input(format!("{{ echo out; echo err >&2 }} > {} 2>&1", path.display())).unwrap();
+    test_input(format!(
+      "{{ echo out; echo err >&2 }} > {} 2>&1",
+      path.display()
+    ))
+    .unwrap();
 
     let contents = std::fs::read_to_string(&path).unwrap();
     assert!(contents.contains("out"));

src/readline/highlight.rs

@@ -88,7 +88,9 @@ impl Highlighter {
     while prefix_chars.peek().is_some() {
       match chars.next() {
         Some(c) if c == markers::VISUAL_MODE_START || c == markers::VISUAL_MODE_END => continue,
-        Some(c) if Some(&c) == prefix_chars.peek() => { prefix_chars.next(); }
+        Some(c) if Some(&c) == prefix_chars.peek() => {
+          prefix_chars.next();
+        }
         _ => return text.to_string(), // mismatch, return original
       }
     }
@@ -104,7 +106,9 @@ impl Highlighter {
     let mut si = suffix_chars.len();
 
     while si > 0 {
-      if ti == 0 { return text.to_string(); }
+      if ti == 0 {
+        return text.to_string();
+      }
       ti -= 1;
       if chars[ti] == markers::VISUAL_MODE_START || chars[ti] == markers::VISUAL_MODE_END {
         continue; // skip visual markers
@@ -346,7 +350,9 @@ impl Highlighter {
           recursive_highlighter.highlight();
           // Read back visual state — selection may have started/ended inside
           self.in_selection = recursive_highlighter.in_selection;
-          self.style_stack.append(&mut recursive_highlighter.style_stack);
+          self
+            .style_stack
+            .append(&mut recursive_highlighter.style_stack);
           if selection_at_entry {
             self.emit_style(Style::BgWhite | Style::Black);
             self.output.push_str(prefix);

src/readline/history.rs

@@ -203,6 +203,7 @@ fn dedupe_entries(entries: &[HistEntry]) -> Vec<HistEntry> {
     .collect()
 }
 
+#[derive(Default, Clone, Debug)]
 pub struct History {
   path: PathBuf,
   pub pending: Option<LineBuf>, // command, cursor_pos
@@ -214,21 +215,41 @@ pub struct History {
   //search_direction: Direction,
   ignore_dups: bool,
   max_size: Option<u32>,
+  stateless: bool,
 }
 
 impl History {
+  pub fn empty() -> Self {
+    Self {
+      path: PathBuf::new(),
+      pending: None,
+      entries: Vec::new(),
+      search_mask: Vec::new(),
+      fuzzy_finder: FuzzySelector::new("History").number_candidates(true),
+      no_matches: false,
+      cursor: 0,
+      //search_direction: Direction::Backward,
+      ignore_dups: false,
+      max_size: None,
+      stateless: true,
+    }
+  }
   pub fn new() -> ShResult<Self> {
     let ignore_dups = crate::state::read_shopts(|s| s.core.hist_ignore_dupes);
     let max_hist = crate::state::read_shopts(|s| s.core.max_hist);
+
     let path = PathBuf::from(env::var("SHEDHIST").unwrap_or({
       let home = env::var("HOME").unwrap();
       format!("{home}/.shed_history")
     }));
+
     let mut entries = read_hist_file(&path)?;
+
     // Enforce max_hist limit on loaded entries (negative = unlimited)
     if max_hist >= 0 && entries.len() > max_hist as usize {
       entries = entries.split_off(entries.len() - max_hist as usize);
     }
+
     let search_mask = dedupe_entries(&entries);
     let cursor = search_mask.len();
     let max_size = if max_hist < 0 {
@@ -236,6 +257,7 @@ impl History {
     } else {
       Some(max_hist as u32)
     };
+
     Ok(Self {
       path,
       entries,
@@ -247,6 +269,7 @@ impl History {
       //search_direction: Direction::Backward,
       ignore_dups,
       max_size,
+      stateless: false,
     })
   }
 
@@ -261,7 +284,7 @@ impl History {
         .search_mask
         .clone()
         .into_iter()
-        .map(|ent| ent.command().to_string());
+        .map(|ent| super::complete::Candidate::from(ent.command()));
       self.fuzzy_finder.activate(raw_entries.collect());
       None
     }
@@ -294,7 +317,7 @@ impl History {
 
   pub fn update_pending_cmd(&mut self, buf: (&str, usize)) {
     let cursor_pos = if let Some(pending) = &self.pending {
-      pending.cursor.get()
+      pending.cursor_to_flat()
     } else {
       buf.1
     };
@@ -306,7 +329,7 @@ impl History {
 
     if let Some(pending) = &mut self.pending {
       pending.set_buffer(cmd);
-      pending.cursor.set(cursor_pos);
+      pending.set_cursor_from_flat(cursor_pos);
     } else {
       self.pending = Some(LineBuf::new().with_initial(&cmd, cursor_pos));
     }
@@ -391,7 +414,12 @@ impl History {
   }
 
   pub fn get_hint(&self) -> Option<String> {
-    if self.at_pending() && self.pending.as_ref().is_some_and(|p| !p.buffer.is_empty()) {
+    if self.at_pending()
+      && self
+        .pending
+        .as_ref()
+        .is_some_and(|p| !p.joined().is_empty())
+    {
       let entry = self.hint_entry()?;
       Some(entry.command().to_string())
     } else {
@@ -431,6 +459,9 @@ impl History {
   }
 
   pub fn save(&mut self) -> ShResult<()> {
+    if self.stateless {
+      return Ok(());
+    }
     let mut file = OpenOptions::new()
       .create(true)
       .append(true)
@@ -481,12 +512,8 @@ mod tests {
       env::set_var(key, val);
     }
     guard(prev, move |p| match p {
-      Some(v) => unsafe {
+      Some(v) => unsafe { env::set_var(key, v) },
-        env::set_var(key, v)
+      None => unsafe { env::remove_var(key) },
-      },
-      None => unsafe {
-        env::remove_var(key)
-      },
     })
   }
 
@@ -503,12 +530,7 @@ mod tests {
   fn write_history_file(path: &Path) {
     fs::write(
       path,
-      [
+      [": 1;1;first\n", ": 2;1;second\n", ": 3;1;third\n"].concat(),
-        ": 1;1;first\n",
-        ": 2;1;second\n",
-        ": 3;1;third\n",
-      ]
-      .concat(),
     )
     .unwrap();
   }
@@ -567,12 +589,7 @@ mod tests {
     let hist_path = tmp.path().join("history");
     fs::write(
       &hist_path,
-      [
+      [": 1;1;repeat\n", ": 2;1;unique\n", ": 3;1;repeat\n"].concat(),
-        ": 1;1;repeat\n",
-        ": 2;1;unique\n",
-        ": 3;1;repeat\n",
-      ]
-      .concat(),
     )
     .unwrap();
 

src/readline/register.rs

@@ -1,7 +1,27 @@
 use std::{fmt::Display, sync::Mutex};
 
+use crate::readline::linebuf::Line;
+
 pub static REGISTERS: Mutex<Registers> = Mutex::new(Registers::new());
 
+#[cfg(test)]
+pub static SAVED_REGISTERS: Mutex<Option<Registers>> = Mutex::new(None);
+
+#[cfg(test)]
+pub fn save_registers() {
+  let mut saved = SAVED_REGISTERS.lock().unwrap();
+  *saved = Some(REGISTERS.lock().unwrap().clone());
+}
+
+#[cfg(test)]
+pub fn restore_registers() {
+  let mut saved = SAVED_REGISTERS.lock().unwrap();
+  if let Some(ref registers) = *saved {
+    *REGISTERS.lock().unwrap() = registers.clone();
+  }
+  *saved = None;
+}
+
 pub fn read_register(ch: Option<char>) -> Option<RegisterContent> {
   let lock = REGISTERS.lock().unwrap();
   lock.get_reg(ch).map(|r| r.content().clone())
@@ -23,8 +43,9 @@ pub fn append_register(ch: Option<char>, buf: RegisterContent) {
 
 #[derive(Default, Clone, Debug)]
 pub enum RegisterContent {
-  Span(String),
+  Span(Vec<Line>),
-  Line(String),
+  Line(Vec<Line>),
+  Block(Vec<Line>),
   #[default]
   Empty,
 }
@@ -32,8 +53,16 @@ pub enum RegisterContent {
 impl Display for RegisterContent {
   fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
     match self {
-      Self::Span(s) => write!(f, "{}", s),
+      Self::Block(s) | Self::Line(s) | Self::Span(s) => {
-      Self::Line(s) => write!(f, "{}", s),
+        write!(
+          f,
+          "{}",
+          s.iter()
+            .map(|l| l.to_string())
+            .collect::<Vec<_>>()
+            .join("\n")
+        )
+      }
       Self::Empty => write!(f, ""),
     }
   }
@@ -41,16 +70,11 @@ impl Display for RegisterContent {
 
 impl RegisterContent {
   pub fn clear(&mut self) {
-    match self {
+    *self = Self::Empty
-      Self::Span(s) => s.clear(),
-      Self::Line(s) => s.clear(),
-      Self::Empty => {}
-    }
   }
   pub fn len(&self) -> usize {
     match self {
-      Self::Span(s) => s.len(),
+      Self::Span(s) | Self::Line(s) | Self::Block(s) => s.len(),
-      Self::Line(s) => s.len(),
       Self::Empty => 0,
     }
   }
@@ -58,28 +82,25 @@ impl RegisterContent {
     match self {
       Self::Span(s) => s.is_empty(),
       Self::Line(s) => s.is_empty(),
+      Self::Block(s) => s.is_empty(),
       Self::Empty => true,
     }
   }
+  pub fn is_block(&self) -> bool {
+    matches!(self, Self::Block(_))
+  }
   pub fn is_line(&self) -> bool {
     matches!(self, Self::Line(_))
   }
   pub fn is_span(&self) -> bool {
     matches!(self, Self::Span(_))
   }
-  pub fn as_str(&self) -> &str {
-    match self {
-      Self::Span(s) => s,
-      Self::Line(s) => s,
-      Self::Empty => "",
-    }
-  }
   pub fn char_count(&self) -> usize {
-    self.as_str().chars().count()
+    self.to_string().chars().count()
   }
 }
 
-#[derive(Default, Debug)]
+#[derive(Default, Clone, Debug)]
 pub struct Registers {
   default: Register,
   a: Register,
@@ -220,7 +241,7 @@ pub struct Register {
 impl Register {
   pub const fn new() -> Self {
     Self {
-      content: RegisterContent::Span(String::new()),
+      content: RegisterContent::Empty,
     }
   }
   pub fn content(&self) -> &RegisterContent {
@@ -229,13 +250,16 @@ impl Register {
   pub fn write(&mut self, buf: RegisterContent) {
     self.content = buf
   }
-  pub fn append(&mut self, buf: RegisterContent) {
+  pub fn append(&mut self, mut buf: RegisterContent) {
     match buf {
       RegisterContent::Empty => {}
-      RegisterContent::Span(ref s) | RegisterContent::Line(ref s) => match &mut self.content {
+      RegisterContent::Span(ref mut s)
+      | RegisterContent::Block(ref mut s)
+      | RegisterContent::Line(ref mut s) => match &mut self.content {
         RegisterContent::Empty => self.content = buf,
-        RegisterContent::Span(existing) => existing.push_str(s),
+        RegisterContent::Span(existing)
-        RegisterContent::Line(existing) => existing.push_str(s),
+        | RegisterContent::Line(existing)
+        | RegisterContent::Block(existing) => existing.append(s),
       },
     }
   }

src/readline/term.rs

@@ -69,17 +69,19 @@ pub fn get_win_size(fd: RawFd) -> (Col, Row) {
   }
 }
 
-fn enumerate_lines(s: &str, left_pad: usize, show_numbers: bool) -> String {
+fn enumerate_lines(s: &str, left_pad: usize, show_numbers: bool, offset: usize, _total_buf_lines: usize) -> String {
-  let total_lines = s.lines().count();
+  let lines: Vec<&str> = s.split('\n').collect();
-  let max_num_len = total_lines.to_string().len();
+  let visible_count = lines.len();
-  s.lines()
+  let max_num_len = (offset + visible_count).to_string().len();
+  lines
+    .into_iter()
     .enumerate()
     .fold(String::new(), |mut acc, (i, ln)| {
       if i == 0 {
         acc.push_str(ln);
         acc.push('\n');
       } else {
-        let num = (i + 1).to_string();
+        let num = (i + offset + 1).to_string();
         let num_pad = max_num_len - num.len();
         // " 2 | " — num + padding + " | "
         let prefix_len = max_num_len + 3; // "N | "
@@ -89,7 +91,7 @@ fn enumerate_lines(s: &str, left_pad: usize, show_numbers: bool) -> String {
         } else {
           " ".repeat(prefix_len + 1).to_string()
         };
-        if i == total_lines - 1 {
+        if i == visible_count - 1 {
           write!(acc, "{prefix}{}{ln}", " ".repeat(trail_pad)).unwrap();
         } else {
           writeln!(acc, "{prefix}{}{ln}", " ".repeat(trail_pad)).unwrap();
@@ -218,7 +220,7 @@ pub trait KeyReader {
 
 pub trait LineWriter {
   fn clear_rows(&mut self, layout: &Layout) -> ShResult<()>;
-  fn redraw(&mut self, prompt: &str, line: &str, new_layout: &Layout) -> ShResult<()>;
+  fn redraw(&mut self, prompt: &str, line: &str, new_layout: &Layout, offset: usize, total_buf_lines: usize) -> ShResult<()>;
   fn flush_write(&mut self, buf: &str) -> ShResult<()>;
   fn send_bell(&mut self) -> ShResult<()>;
 }
@@ -294,12 +296,14 @@ impl Read for TermBuffer {
 
 struct KeyCollector {
   events: VecDeque<KeyEvent>,
+  ss3_pending: bool,
 }
 
 impl KeyCollector {
   fn new() -> Self {
     Self {
       events: VecDeque::new(),
+      ss3_pending: false,
     }
   }
 
@@ -337,7 +341,55 @@ impl Default for KeyCollector {
 
 impl Perform for KeyCollector {
   fn print(&mut self, c: char) {
+    log::trace!("print: {c:?}");
     // vte routes 0x7f (DEL) to print instead of execute
+    if self.ss3_pending {
+      self.ss3_pending = false;
+      match c {
+        'A' => {
+          self.push(KeyEvent(KeyCode::Up, ModKeys::empty()));
+          return;
+        }
+        'B' => {
+          self.push(KeyEvent(KeyCode::Down, ModKeys::empty()));
+          return;
+        }
+        'C' => {
+          self.push(KeyEvent(KeyCode::Right, ModKeys::empty()));
+          return;
+        }
+        'D' => {
+          self.push(KeyEvent(KeyCode::Left, ModKeys::empty()));
+          return;
+        }
+        'H' => {
+          self.push(KeyEvent(KeyCode::Home, ModKeys::empty()));
+          return;
+        }
+        'F' => {
+          self.push(KeyEvent(KeyCode::End, ModKeys::empty()));
+          return;
+        }
+        'P' => {
+          self.push(KeyEvent(KeyCode::F(1), ModKeys::empty()));
+          return;
+        }
+        'Q' => {
+          self.push(KeyEvent(KeyCode::F(2), ModKeys::empty()));
+          return;
+        }
+        'R' => {
+          self.push(KeyEvent(KeyCode::F(3), ModKeys::empty()));
+          return;
+        }
+        'S' => {
+          self.push(KeyEvent(KeyCode::F(4), ModKeys::empty()));
+          return;
+        }
+        _ => {}
+      }
+    }
+
     if c == '\x7f' {
       self.push(KeyEvent(KeyCode::Backspace, ModKeys::empty()));
     } else {
@@ -346,6 +398,7 @@ impl Perform for KeyCollector {
   }
 
   fn execute(&mut self, byte: u8) {
+    log::trace!("execute: {byte:#04x}");
     let event = match byte {
       0x00 => KeyEvent(KeyCode::Char(' '), ModKeys::CTRL), // Ctrl+Space / Ctrl+@
       0x09 => KeyEvent(KeyCode::Tab, ModKeys::empty()),    // Tab (Ctrl+I)
@@ -370,6 +423,9 @@ impl Perform for KeyCollector {
     _ignore: bool,
     action: char,
   ) {
+    log::trace!(
+      "CSI dispatch: params={params:?}, intermediates={intermediates:?}, action={action:?}"
+    );
     let params: Vec<u16> = params
       .iter()
       .map(|p| p.first().copied().unwrap_or(0))
@@ -481,16 +537,10 @@ impl Perform for KeyCollector {
   }
 
   fn esc_dispatch(&mut self, intermediates: &[u8], _ignore: bool, byte: u8) {
-    // SS3 sequences (ESC O P/Q/R/S for F1-F4)
+    log::trace!("ESC dispatch: intermediates={intermediates:?}, byte={byte:#04x}");
-    if intermediates == [b'O'] {
+    // SS3 sequences
-      let key = match byte {
+    if byte == b'O' {
-        b'P' => KeyCode::F(1),
+      self.ss3_pending = true;
-        b'Q' => KeyCode::F(2),
-        b'R' => KeyCode::F(3),
-        b'S' => KeyCode::F(4),
-        _ => return,
-      };
-      self.push(KeyEvent(key, ModKeys::empty()));
     }
   }
 }
@@ -499,6 +549,7 @@ pub struct PollReader {
   parser: Parser,
   collector: KeyCollector,
   byte_buf: VecDeque<u8>,
+  pub verbatim_single: bool,
   pub verbatim: bool,
 }
 
@@ -508,6 +559,7 @@ impl PollReader {
       parser: Parser::new(),
       collector: KeyCollector::new(),
       byte_buf: VecDeque::new(),
+      verbatim_single: false,
       verbatim: false,
     }
   }
@@ -531,6 +583,18 @@ impl PollReader {
     None
   }
 
+  pub fn read_one_verbatim(&mut self) -> Option<KeyEvent> {
+    if self.byte_buf.is_empty() {
+      return None;
+    }
+    let bytes: Vec<u8> = self.byte_buf.drain(..).collect();
+    let verbatim_str = String::from_utf8_lossy(&bytes).to_string();
+    Some(KeyEvent(
+      KeyCode::Verbatim(verbatim_str.into()),
+      ModKeys::empty(),
+    ))
+  }
+
   pub fn feed_bytes(&mut self, bytes: &[u8]) {
     self.byte_buf.extend(bytes);
   }
@@ -544,18 +608,27 @@ impl Default for PollReader {
 
 impl KeyReader for PollReader {
   fn read_key(&mut self) -> Result<Option<KeyEvent>, ShErr> {
+    if self.verbatim_single {
+      if let Some(key) = self.read_one_verbatim() {
+        self.verbatim_single = false;
+        return Ok(Some(key));
+      }
+      return Ok(None);
+    }
     if self.verbatim {
       if let Some(paste) = self.handle_bracket_paste() {
         return Ok(Some(paste));
       }
       // If we're in verbatim mode but haven't seen the end marker yet, don't attempt to parse keys
       return Ok(None);
-		} else if self.byte_buf.len() == 1
+    } else if self.byte_buf.front() == Some(&b'\x1b') {
-			&& self.byte_buf.front() == Some(&b'\x1b') {
+      // Escape: if it's the only byte, or the next byte isn't a valid
-			// User pressed escape
+      // escape sequence prefix ([ or O), emit a standalone Escape
-			self.byte_buf.pop_front(); // Consume the escape byte
+      if self.byte_buf.len() == 1 || !matches!(self.byte_buf.get(1), Some(b'[') | Some(b'O')) {
+        self.byte_buf.pop_front();
         return Ok(Some(KeyEvent(KeyCode::Esc, ModKeys::empty())));
       }
+    }
     while let Some(byte) = self.byte_buf.pop_front() {
       self.parser.advance(&mut self.collector, &[byte]);
       if let Some(key) = self.collector.pop() {
@@ -567,7 +640,7 @@ impl KeyReader for PollReader {
               continue;
             }
           }
-					_ => return Ok(Some(key))
+          _ => return Ok(Some(key)),
         }
       }
     }
@@ -821,6 +894,7 @@ impl Default for Layout {
   }
 }
 
+#[derive(Clone, Debug, Default)]
 pub struct TermWriter {
   last_bell: Option<Instant>,
   out: RawFd,
@@ -1020,7 +1094,7 @@ impl LineWriter for TermWriter {
     Ok(())
   }
 
-  fn redraw(&mut self, prompt: &str, line: &str, new_layout: &Layout) -> ShResult<()> {
+  fn redraw(&mut self, prompt: &str, line: &str, new_layout: &Layout, offset: usize, total_buf_lines: usize) -> ShResult<()> {
     let err = |_| {
       ShErr::simple(
         ShErrKind::InternalErr,
@@ -1046,7 +1120,7 @@ impl LineWriter for TermWriter {
     if multiline {
       let prompt_end = Layout::calc_pos(self.t_cols, prompt, Pos { col: 0, row: 0 }, 0, false);
       let show_numbers = read_shopts(|o| o.prompt.line_numbers);
-      let display_line = enumerate_lines(line, prompt_end.col as usize, show_numbers);
+      let display_line = enumerate_lines(line, prompt_end.col as usize, show_numbers, offset, total_buf_lines);
       self.buffer.push_str(&display_line);
     } else {
       self.buffer.push_str(line);

src/readline/tests.rs

@@ -0,0 +1,529 @@
+#![allow(non_snake_case)]
+use std::os::fd::AsRawFd;
+
+use crate::{
+  readline::{Prompt, ShedVi, annotate_input},
+  testutil::TestGuard,
+};
+
+fn assert_annotated(input: &str, expected: &str) {
+  let result = annotate_input(input);
+  assert_eq!(result, expected, "\nInput: {input:?}");
+}
+
+/// Tests for our vim logic emulation. Each test consists of an initial text, a sequence of keys to feed, and the expected final text and cursor position.
+macro_rules! vi_test {
+    { $($name:ident: $input:expr => $op:expr => $expected_text:expr,$expected_cursor:expr);* } => {
+				$(
+						#[test]
+						fn $name() {
+							let (mut vi, _g) = test_vi($input);
+							vi.feed_bytes(b"\x1b"); // Start in normal mode
+							vi.process_input().unwrap();
+
+							vi.feed_bytes($op.as_bytes());
+							vi.process_input().unwrap();
+							assert_eq!(vi.editor.joined(), $expected_text);
+							assert_eq!(vi.editor.cursor_to_flat(), $expected_cursor);
+						}
+				)*
+
+    };
+}
+
+// ===================== Annotation Tests =====================
+
+#[test]
+fn annotate_simple_command() {
+  assert_annotated("echo hello", "\u{e101}echo\u{e11a} \u{e102}hello\u{e11a}");
+}
+
+#[test]
+fn annotate_pipeline() {
+  assert_annotated(
+    "ls | grep foo",
+    "\u{e100}ls\u{e11a} \u{e104}|\u{e11a} \u{e100}grep\u{e11a} \u{e102}foo\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_conjunction() {
+  assert_annotated(
+    "echo foo && echo bar",
+    "\u{e101}echo\u{e11a} \u{e102}foo\u{e11a} \u{e104}&&\u{e11a} \u{e101}echo\u{e11a} \u{e102}bar\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_redirect_output() {
+  assert_annotated(
+    "echo hello > file.txt",
+    "\u{e101}echo\u{e11a} \u{e102}hello\u{e11a} \u{e105}>\u{e11a} \u{e102}file.txt\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_redirect_append() {
+  assert_annotated(
+    "echo hello >> file.txt",
+    "\u{e101}echo\u{e11a} \u{e102}hello\u{e11a} \u{e105}>>\u{e11a} \u{e102}file.txt\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_redirect_input() {
+  assert_annotated(
+    "cat < file.txt",
+    "\u{e100}cat\u{e11a} \u{e105}<\u{e11a} \u{e102}file.txt\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_fd_redirect() {
+  assert_annotated("cmd 2>&1", "\u{e100}cmd\u{e11a} \u{e105}2>&1\u{e11a}");
+}
+
+#[test]
+fn annotate_variable_sub() {
+  assert_annotated(
+    "echo $HOME",
+    "\u{e101}echo\u{e11a} \u{e102}\u{e10c}$HOME\u{e10d}\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_variable_brace_sub() {
+  assert_annotated(
+    "echo ${HOME}",
+    "\u{e101}echo\u{e11a} \u{e102}\u{e10c}${HOME}\u{e10d}\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_command_sub() {
+  assert_annotated(
+    "echo $(ls)",
+    "\u{e101}echo\u{e11a} \u{e102}\u{e10e}$(ls)\u{e10f}\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_single_quoted_string() {
+  assert_annotated(
+    "echo 'hello world'",
+    "\u{e101}echo\u{e11a} \u{e102}\u{e114}'hello world'\u{e115}\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_double_quoted_string() {
+  assert_annotated(
+    "echo \"hello world\"",
+    "\u{e101}echo\u{e11a} \u{e102}\u{e112}\"hello world\"\u{e113}\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_assignment() {
+  assert_annotated("FOO=bar", "\u{e107}FOO=bar\u{e11a}");
+}
+
+#[test]
+fn annotate_assignment_with_command() {
+  assert_annotated(
+    "FOO=bar echo hello",
+    "\u{e107}FOO=bar\u{e11a} \u{e101}echo\u{e11a} \u{e102}hello\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_if_statement() {
+  assert_annotated(
+    "if true; then echo yes; fi",
+    "\u{e103}if\u{e11a} \u{e101}true\u{e11a}\u{e108}; \u{e11a}\u{e103}then\u{e11a} \u{e101}echo\u{e11a} \u{e102}yes\u{e11a}\u{e108}; \u{e11a}\u{e103}fi\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_for_loop() {
+  assert_annotated(
+    "for i in a b c; do echo $i; done",
+    "\u{e103}for\u{e11a} \u{e102}i\u{e11a} \u{e103}in\u{e11a} \u{e102}a\u{e11a} \u{e102}b\u{e11a} \u{e102}c\u{e11a}\u{e108}; \u{e11a}\u{e103}do\u{e11a} \u{e101}echo\u{e11a} \u{e102}\u{e10c}$i\u{e10d}\u{e11a}\u{e108}; \u{e11a}\u{e103}done\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_while_loop() {
+  assert_annotated(
+    "while true; do echo hello; done",
+    "\u{e103}while\u{e11a} \u{e101}true\u{e11a}\u{e108}; \u{e11a}\u{e103}do\u{e11a} \u{e101}echo\u{e11a} \u{e102}hello\u{e11a}\u{e108}; \u{e11a}\u{e103}done\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_case_statement() {
+  assert_annotated(
+    "case foo in bar) echo bar;; esac",
+    "\u{e103}case\u{e11a} \u{e102}foo\u{e11a} \u{e103}in\u{e11a} \u{e104}bar\u{e109})\u{e11a} \u{e101}echo\u{e11a} \u{e102}bar\u{e11a}\u{e108};; \u{e11a}\u{e103}esac\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_brace_group() {
+  assert_annotated(
+    "{ echo hello; }",
+    "\u{e104}{\u{e11a} \u{e101}echo\u{e11a} \u{e102}hello\u{e11a}\u{e108}; \u{e11a}\u{e104}}\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_comment() {
+  assert_annotated(
+    "echo hello # this is a comment",
+    "\u{e101}echo\u{e11a} \u{e102}hello\u{e11a} \u{e106}# this is a comment\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_semicolon_sep() {
+  assert_annotated(
+    "echo foo; echo bar",
+    "\u{e101}echo\u{e11a} \u{e102}foo\u{e11a}\u{e108}; \u{e11a}\u{e101}echo\u{e11a} \u{e102}bar\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_escaped_char() {
+  assert_annotated(
+    "echo hello\\ world",
+    "\u{e101}echo\u{e11a} \u{e102}hello\\ world\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_glob() {
+  assert_annotated(
+    "ls *.txt",
+    "\u{e100}ls\u{e11a} \u{e102}\u{e117}*\u{e11a}.txt\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_heredoc_operator() {
+  assert_annotated(
+    "cat <<EOF",
+    "\u{e100}cat\u{e11a} \u{e105}<<\u{e11a}\u{e102}EOF\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_herestring_operator() {
+  assert_annotated(
+    "cat <<< hello",
+    "\u{e100}cat\u{e11a} \u{e105}<<<\u{e11a} \u{e102}hello\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_nested_command_sub() {
+  assert_annotated(
+    "echo $(echo $(ls))",
+    "\u{e101}echo\u{e11a} \u{e102}\u{e10e}$(echo $(ls))\u{e10f}\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_var_in_double_quotes() {
+  assert_annotated(
+    "echo \"hello $USER\"",
+    "\u{e101}echo\u{e11a} \u{e102}\u{e112}\"hello \u{e10c}$USER\u{e10d}\"\u{e113}\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_func_def() {
+  assert_annotated(
+    "foo() { echo hello; }",
+    "\u{e103}foo()\u{e11a} \u{e104}{\u{e11a} \u{e101}echo\u{e11a} \u{e102}hello\u{e11a}\u{e108}; \u{e11a}\u{e104}}\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_negate() {
+  assert_annotated(
+    "! echo hello",
+    "\u{e104}!\u{e11a} \u{e101}echo\u{e11a} \u{e102}hello\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_or_conjunction() {
+  assert_annotated(
+    "false || echo fallback",
+    "\u{e101}false\u{e11a} \u{e104}||\u{e11a} \u{e101}echo\u{e11a} \u{e102}fallback\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_complex_pipeline() {
+  assert_annotated(
+    "cat file.txt | grep pattern | wc -l",
+    "\u{e100}cat\u{e11a} \u{e102}file.txt\u{e11a} \u{e104}|\u{e11a} \u{e100}grep\u{e11a} \u{e102}pattern\u{e11a} \u{e104}|\u{e11a} \u{e100}wc\u{e11a} \u{e102}-l\u{e11a}",
+  );
+}
+
+#[test]
+fn annotate_multiple_redirects() {
+  assert_annotated(
+    "cmd > out.txt 2> err.txt",
+    "\u{e100}cmd\u{e11a} \u{e105}>\u{e11a} \u{e102}out.txt\u{e11a} \u{e105}2>\u{e11a} \u{e102}err.txt\u{e11a}",
+  );
+}
+
+// ===================== Vi Tests =====================
+
+fn test_vi(initial: &str) -> (ShedVi, TestGuard) {
+  let g = TestGuard::new();
+  let prompt = Prompt::default();
+  let vi = ShedVi::new_no_hist(prompt, g.pty_slave().as_raw_fd())
+    .unwrap()
+    .with_initial(initial);
+
+  (vi, g)
+}
+
+// Why can't I marry a programming language
+vi_test! {
+  vi_dw_basic          : "hello world"            => "dw"           => "world", 0;
+  vi_dw_middle         : "one two three"          => "wdw"          => "one three", 4;
+  vi_dd_whole_line     : "hello world"            => "dd"           => "", 0;
+  vi_x_single          : "hello"                  => "x"            => "ello", 0;
+  vi_x_middle          : "hello"                  => "llx"          => "helo", 2;
+  vi_X_backdelete      : "hello"                  => "llX"          => "hllo", 1;
+  vi_h_motion          : "hello"                  => "$h"           => "hello", 3;
+  vi_l_motion          : "hello"                  => "l"            => "hello", 1;
+  vi_h_at_start        : "hello"                  => "h"            => "hello", 0;
+  vi_l_at_end          : "hello"                  => "$l"           => "hello", 4;
+  vi_w_forward         : "one two three"          => "w"            => "one two three", 4;
+  vi_b_backward        : "one two three"          => "$b"           => "one two three", 8;
+  vi_e_end             : "one two three"          => "e"            => "one two three", 2;
+  vi_ge_back_end       : "one two three"          => "$ge"          => "one two three", 6;
+  vi_w_punctuation     : "foo.bar baz"            => "w"            => "foo.bar baz", 3;
+  vi_e_punctuation     : "foo.bar baz"            => "e"            => "foo.bar baz", 2;
+  vi_b_punctuation     : "foo.bar baz"            => "$b"           => "foo.bar baz", 8;
+  vi_w_at_eol          : "hello"                  => "$w"           => "hello", 4;
+  vi_b_at_bol          : "hello"                  => "b"            => "hello", 0;
+  vi_W_forward         : "foo.bar baz"            => "W"            => "foo.bar baz", 8;
+  vi_B_backward        : "foo.bar baz"            => "$B"           => "foo.bar baz", 8;
+  vi_E_end             : "foo.bar baz"            => "E"            => "foo.bar baz", 6;
+  vi_gE_back_end       : "one two three"          => "$gE"          => "one two three", 6;
+  vi_W_skip_punct      : "one-two three"          => "W"            => "one-two three", 8;
+  vi_B_skip_punct      : "one two-three"          => "$B"           => "one two-three", 4;
+  vi_E_skip_punct      : "one-two three"          => "E"            => "one-two three", 6;
+  vi_dW_big            : "foo.bar baz"            => "dW"           => "baz", 0;
+  vi_cW_big            : "foo.bar baz"            => "cWx\x1b"      => "x baz", 0;
+  vi_zero_bol          : "  hello"                => "$0"           => "  hello", 0;
+  vi_caret_first_char  : "  hello"                => "$^"           => "  hello", 2;
+  vi_dollar_eol        : "hello world"            => "$"            => "hello world", 10;
+  vi_g_last_nonws      : "hello   "               => "g_"           => "hello   ", 4;
+  vi_g_no_trailing     : "hello"                  => "g_"           => "hello", 4;
+  vi_pipe_column       : "hello world"            => "6|"           => "hello world", 5;
+  vi_pipe_col1         : "hello world"            => "1|"           => "hello world", 0;
+  vi_I_insert_front    : "  hello"                => "Iworld \x1b"  => "  world hello", 7;
+  vi_A_append_end      : "hello"                  => "A world\x1b"  => "hello world", 10;
+  vi_f_find            : "hello world"            => "fo"           => "hello world", 4;
+  vi_F_find_back       : "hello world"            => "$Fo"          => "hello world", 7;
+  vi_t_till            : "hello world"            => "tw"           => "hello world", 5;
+  vi_T_till_back       : "hello world"            => "$To"          => "hello world", 8;
+  vi_f_no_match        : "hello"                  => "fz"           => "hello", 0;
+  vi_semicolon_repeat  : "abcabc"                 => "fa;;"         => "abcabc", 3;
+  vi_comma_reverse     : "abcabc"                 => "fa;;,"        => "abcabc", 0;
+  vi_df_semicolon      : "abcabc"                 => "fa;;dfa"      => "abcabc", 3;
+  vi_t_at_target       : "aab"                    => "lta"          => "aab", 1;
+  vi_D_to_end          : "hello world"            => "wD"           => "hello ", 5;
+  vi_d_dollar          : "hello world"            => "wd$"          => "hello ", 5;
+  vi_d0_to_start       : "hello world"            => "$d0"          => "d", 0;
+  vi_dw_multiple       : "one two three"          => "d2w"          => "three", 0;
+  vi_dt_char           : "hello world"            => "dtw"          => "world", 0;
+  vi_df_char           : "hello world"            => "dfw"          => "orld", 0;
+  vi_dh_back           : "hello"                  => "lldh"         => "hllo", 1;
+  vi_dl_forward        : "hello"                  => "dl"           => "ello", 0;
+  vi_dge_back_end      : "one two three"          => "$dge"         => "one tw", 5;
+  vi_dG_to_end         : "hello world"            => "dG"           => "", 0;
+  vi_dgg_to_start      : "hello world"            => "$dgg"         => "", 0;
+  vi_d_semicolon       : "abcabc"                 => "fad;"         => "abcabc", 3;
+  vi_cw_basic          : "hello world"            => "cwfoo\x1b"    => "foo world", 2;
+  vi_C_to_end          : "hello world"            => "wCfoo\x1b"    => "hello foo", 8;
+  vi_cc_whole          : "hello world"            => "ccfoo\x1b"    => "foo", 2;
+  vi_ct_char           : "hello world"            => "ctwfoo\x1b"   => "fooworld", 2;
+  vi_s_single          : "hello"                  => "sfoo\x1b"     => "fooello", 2;
+  vi_S_whole_line      : "hello world"            => "Sfoo\x1b"     => "foo", 2;
+  vi_cl_forward        : "hello"                  => "clX\x1b"      => "Xello", 0;
+  vi_ch_backward       : "hello"                  => "llchX\x1b"    => "hXllo", 1;
+  vi_cb_word_back      : "hello world"            => "$cbfoo\x1b"   => "hello food", 8;
+  vi_ce_word_end       : "hello world"            => "cefoo\x1b"    => "foo world", 2;
+  vi_c0_to_start       : "hello world"            => "wc0foo\x1b"   => "fooworld", 2;
+  vi_yw_p_basic        : "hello world"            => "ywwP"         => "hello hello world", 11;
+  vi_dw_p_paste        : "hello world"            => "dwP"          => "hello world", 5;
+  vi_dd_p_paste        : "hello world"            => "ddp"          => "\nhello world", 1;
+  vi_y_dollar_p        : "hello world"            => "wy$P"         => "hello worldworld", 10;
+  vi_ye_p              : "hello world"            => "yewP"         => "hello helloworld", 10;
+  vi_yy_p              : "hello world"            => "yyp"          => "hello world\nhello world", 12;
+  vi_Y_p               : "hello world"            => "Yp"           => "hhello worldello world", 11;
+  vi_p_after_x         : "hello"                  => "xp"           => "ehllo", 1;
+  vi_P_before          : "hello"                  => "llxP"         => "hello", 2;
+  vi_paste_empty       : "hello"                  => "p"            => "hello", 0;
+  vi_r_replace         : "hello"                  => "ra"           => "aello", 0;
+  vi_r_middle          : "hello"                  => "llra"         => "healo", 2;
+  vi_r_at_end          : "hello"                  => "$ra"          => "hella", 4;
+  vi_r_space           : "hello"                  => "r "           => " ello", 0;
+  vi_r_with_count      : "hello"                  => "3rx"          => "xxxlo", 2;
+  vi_tilde_single      : "hello"                  => "~"            => "Hello", 1;
+  vi_tilde_count       : "hello"                  => "3~"           => "HELlo", 3;
+  vi_tilde_at_end      : "HELLO"                  => "$~"           => "HELLo", 4;
+  vi_tilde_mixed       : "hElLo"                  => "5~"           => "HeLlO", 4;
+  vi_gu_word           : "HELLO world"            => "guw"          => "hello world", 0;
+  vi_gU_word           : "hello WORLD"            => "gUw"          => "HELLO WORLD", 0;
+  vi_gu_dollar         : "HELLO WORLD"            => "gu$"          => "hello world", 0;
+  vi_gU_dollar         : "hello world"            => "gU$"          => "HELLO WORLD", 0;
+  vi_gu_0              : "HELLO WORLD"            => "$gu0"         => "hello worlD", 0;
+  vi_gU_0              : "hello world"            => "$gU0"         => "HELLO WORLd", 0;
+  vi_gtilde_word       : "hello WORLD"            => "g~w"          => "HELLO WORLD", 0;
+  vi_gtilde_dollar     : "hello WORLD"            => "g~$"          => "HELLO world", 0;
+  vi_diw_inner         : "one two three"          => "wdiw"         => "one  three", 4;
+  vi_ciw_replace       : "hello world"            => "ciwfoo\x1b"   => "foo world", 2;
+  vi_daw_around        : "one two three"          => "wdaw"         => "one three", 4;
+  vi_yiw_p             : "hello world"            => "yiwAp \x1bp"  => "hello worldp hello", 17;
+  vi_diW_big_inner     : "one-two three"          => "diW"          => " three", 0;
+  vi_daW_big_around    : "one two-three end"      => "wdaW"         => "one end", 4;
+  vi_ciW_big           : "one-two three"          => "ciWx\x1b"     => "x three", 0;
+  vi_di_dquote         : "one \"two\" three"      => "f\"di\""      => "one \"\" three", 5;
+  vi_da_dquote         : "one \"two\" three"      => "f\"da\""      => "one three", 4;
+  vi_ci_dquote         : "one \"two\" three"      => "f\"ci\"x\x1b" => "one \"x\" three", 5;
+  vi_di_squote         : "one 'two' three"        => "f'di'"        => "one '' three", 5;
+  vi_da_squote         : "one 'two' three"        => "f'da'"        => "one three", 4;
+  vi_di_backtick       : "one `two` three"        => "f`di`"        => "one `` three", 5;
+  vi_da_backtick       : "one `two` three"        => "f`da`"        => "one three", 4;
+  vi_ci_dquote_empty   : "one \"\" three"         => "f\"ci\"x\x1b" => "one \"x\" three", 5;
+  vi_di_paren          : "one (two) three"        => "f(di("        => "one () three", 5;
+  vi_da_paren          : "one (two) three"        => "f(da("        => "one  three", 4;
+  vi_ci_paren          : "one (two) three"        => "f(ci(x\x1b"   => "one (x) three", 5;
+  vi_di_brace          : "one {two} three"        => "f{di{"        => "one {} three", 5;
+  vi_da_brace          : "one {two} three"        => "f{da{"        => "one  three", 4;
+  vi_di_bracket        : "one [two] three"        => "f[di["        => "one [] three", 5;
+  vi_da_bracket        : "one [two] three"        => "f[da["        => "one  three", 4;
+  vi_di_angle          : "one <two> three"        => "f<di<"        => "one <> three", 5;
+  vi_da_angle          : "one <two> three"        => "f<da<"        => "one  three", 4;
+  vi_di_paren_nested   : "fn(a, (b, c))"          => "f(di("        => "fn()", 3;
+  vi_di_paren_empty    : "fn() end"               => "f(di("        => "fn() end", 3;
+  vi_dib_alias         : "one (two) three"        => "f(dib"        => "one () three", 5;
+  vi_diB_alias         : "one {two} three"        => "f{diB"        => "one {} three", 5;
+  vi_percent_paren     : "(hello) world"          => "%"            => "(hello) world", 6;
+  vi_percent_brace     : "{hello} world"          => "%"            => "{hello} world", 6;
+  vi_percent_bracket   : "[hello] world"          => "%"            => "[hello] world", 6;
+  vi_percent_from_close: "(hello) world"          => "f)%"          => "(hello) world", 0;
+  vi_d_percent_paren   : "(hello) world"          => "d%"           => " world", 0;
+  vi_to_paren_fwd      : "foo (bar) baz"          => "])"           => "foo (bar) baz", 8;
+  vi_to_paren_bkwd     : "foo (bar) baz"          => "f)[("         => "foo (bar) baz", 4;
+  vi_to_brace_fwd      : "foo {bar} baz"          => "]}"           => "foo {bar} baz", 8;
+  vi_to_brace_bkwd     : "foo {bar} baz"          => "f}[{"         => "foo {bar} baz", 4;
+  vi_to_paren_nested   : "((a)(b)) end"           => "])"           => "((a)(b)) end", 7;
+  vi_to_brace_nested   : "{{a}{b}} end"           => "]}"           => "{{a}{b}} end", 7;
+  vi_d_to_paren_fwd    : "foo (bar) baz"          => "wd])"          => "foo  baz", 4;
+  vi_d_to_brace_fwd    : "foo {bar} baz"          => "wd]}"          => "foo  baz", 4;
+  vi_to_paren_no_match : "foo bar baz"            => "])"           => "foo bar baz", 0;
+  vi_to_brace_no_match : "foo bar baz"            => "]}"           => "foo bar baz", 0;
+  vi_i_insert          : "hello"                  => "iX\x1b"       => "Xhello", 0;
+  vi_a_append          : "hello"                  => "aX\x1b"       => "hXello", 1;
+  vi_I_front           : "  hello"                => "IX\x1b"       => "  Xhello", 2;
+  vi_A_end             : "hello"                  => "AX\x1b"       => "helloX", 5;
+  vi_o_open_below      : "hello"                  => "oworld\x1b"   => "hello\nworld", 10;
+  vi_O_open_above      : "hello"                  => "Oworld\x1b"   => "world\nhello", 4;
+  vi_empty_input       : ""                       => "i hello\x1b"  => " hello", 5;
+  vi_insert_escape     : "hello"                  => "aX\x1b"       => "hXello", 1;
+  vi_ctrl_w_del_word   : "hello world"            => "A\x17\x1b"    => "hello ", 5;
+  vi_ctrl_h_backspace  : "hello"                  => "A\x08\x1b"    => "hell", 3;
+  vi_u_undo_delete     : "hello world"            => "dwu"          => "hello world", 0;
+  vi_u_undo_change     : "hello world"            => "ciwfoo\x1bu"  => "hello world", 0;
+  vi_u_undo_x          : "hello"                  => "xu"           => "hello", 0;
+  vi_ctrl_r_redo       : "hello"                  => "xu\x12"       => "ello", 0;
+  vi_u_multiple        : "hello world"            => "xdwu"         => "ello world", 0;
+  vi_redo_after_undo   : "hello world"            => "dwu\x12"      => "world", 0;
+  vi_dot_repeat_x      : "hello"                  => "x."           => "llo", 0;
+  vi_dot_repeat_dw     : "one two three"          => "dw."          => "three", 0;
+  vi_dot_repeat_cw     : "one two three"          => "cwfoo\x1bw."  => "foo foo three", 6;
+  vi_dot_repeat_r      : "hello"                  => "ra.."         => "aello", 0;
+  vi_dot_repeat_s      : "hello"                  => "sX\x1bl."     => "XXllo", 1;
+  vi_count_h           : "hello world"            => "$3h"          => "hello world", 7;
+  vi_count_l           : "hello world"            => "3l"           => "hello world", 3;
+  vi_count_w           : "one two three four"     => "2w"           => "one two three four", 8;
+  vi_count_b           : "one two three four"     => "$2b"          => "one two three four", 8;
+  vi_count_x           : "hello"                  => "3x"           => "lo", 0;
+  vi_count_dw          : "one two three four"     => "2dw"          => "three four", 0;
+  vi_verb_count_motion : "one two three four"     => "d2w"          => "three four", 0;
+  vi_count_s           : "hello"                  => "3sX\x1b"      => "Xlo", 0;
+  vi_indent_line       : "hello"                  => ">>"           => "\thello", 1;
+  vi_dedent_line       : "\thello"                => "<<"           => "hello", 0;
+  vi_indent_double     : "hello"                  => ">>>>"         => "\t\thello", 2;
+  vi_J_join_lines      : "hello\nworld"           => "J"            => "hello world", 5;
+  vi_v_u_lower         : "HELLO"                  => "vlllu"        => "hellO", 0;
+  vi_v_U_upper         : "hello"                  => "vlllU"        => "HELLo", 0;
+  vi_v_d_delete        : "hello world"            => "vwwd"         => "", 0;
+  vi_v_x_delete        : "hello world"            => "vwwx"         => "", 0;
+  vi_v_c_change        : "hello world"            => "vwcfoo\x1b"   => "fooorld", 2;
+  vi_v_y_p_yank        : "hello world"            => "vwyAp \x1bp"  => "hello worldp hello w", 19;
+  vi_v_dollar_d        : "hello world"            => "wv$d"         => "hello ", 5;
+  vi_v_0_d             : "hello world"            => "$v0d"         => "", 0;
+  vi_ve_d              : "hello world"            => "ved"          => " world", 0;
+  vi_v_o_swap          : "hello world"            => "vllod"        => "lo world", 0;
+  vi_v_r_replace       : "hello"                  => "vlllrx"       => "xxxxo", 0;
+  vi_v_tilde_case      : "hello"                  => "vlll~"        => "HELLo", 0;
+  vi_V_d_delete        : "hello world"            => "Vd"           => "", 0;
+  vi_V_y_p             : "hello world"            => "Vyp"          => "hello world\nhello world", 12;
+  vi_V_S_change        : "hello world"            => "VSfoo\x1b"    => "foo", 2;
+  vi_ctrl_a_inc        : "num 5 end"              => "w\x01"        => "num 6 end", 4;
+  vi_ctrl_x_dec        : "num 5 end"              => "w\x18"        => "num 4 end", 4;
+  vi_ctrl_a_negative   : "num -3 end"             => "w\x01"        => "num -2 end", 5;
+  vi_ctrl_x_to_neg     : "num 0 end"              => "w\x18"        => "num -1 end", 5;
+  vi_ctrl_a_count      : "num 5 end"              => "w3\x01"       => "num 8 end", 4;
+  vi_ctrl_a_width      : "num -00001 end"         => "w\x01"        => "num 00000 end", 8;
+  vi_delete_empty      : ""                       => "x"            => "", 0;
+  vi_undo_on_empty     : ""                       => "u"            => "", 0;
+  vi_w_single_char     : "a b c"                  => "w"            => "a b c", 2;
+  vi_dw_last_word      : "hello"                  => "dw"           => "", 0;
+  vi_dollar_single     : "h"                      => "$"            => "h", 0;
+  vi_caret_no_ws       : "hello"                  => "$^"           => "hello", 0;
+  vi_f_last_char       : "hello"                  => "fo"           => "hello", 4;
+  vi_r_on_space        : "hello world"            => "5|r-"         => "hell- world", 4;
+  vi_vw_doesnt_crash   : ""        					      => "vw"           => "", 0;
+  vi_indent_cursor_pos : "echo foo"               => ">>"           => "\techo foo", 1;
+  vi_join_indent_lines : "echo foo\n\t\techo bar" => "J"            => "echo foo echo bar", 8;
+	vi_cw_stays_on_line  : "echo foo\necho bar" => "wcw" => "echo \necho bar", 5
+}
+
+#[test]
+fn vi_auto_indent() {
+  let (mut vi, _g) = test_vi("");
+
+  // Type each line and press Enter separately so auto-indent triggers
+  let lines = [
+    "func() {",
+    "case foo in",
+    "bar)",
+    "while true; do",
+    "echo foo \\\rbar \\\rbiz \\\rbazz\rbreak\rdone\r;;\resac\r}",
+  ];
+
+  for (i, line) in lines.iter().enumerate() {
+    vi.feed_bytes(line.as_bytes());
+    if i != lines.len() - 1 {
+      vi.feed_bytes(b"\r");
+    }
+    vi.process_input().unwrap();
+  }
+
+  assert_eq!(
+    vi.editor.joined(),
+    "func() {\n\tcase foo in\n\t\tbar)\n\t\t\twhile true; do\n\t\t\t\techo foo \\\n\t\t\t\tbar \\\n\t\t\t\tbiz \\\n\t\t\t\tbazz\n\t\t\t\tbreak\n\t\t\tdone\n\t\t;;\n\tesac\n}"
+  );
+}

src/readline/vicmd.rs

@@ -1,5 +1,12 @@
+use std::path::PathBuf;
+
 use bitflags::bitflags;
 
+use crate::readline::{
+  linebuf::{Grapheme, Pos},
+  vimode::ex::SubFlags,
+};
+
 use super::register::{RegisterContent, append_register, read_register, write_register};
 
 //TODO: write tests that take edit results and cursor positions from actual
@@ -64,6 +71,7 @@ bitflags! {
     const VISUAL_LINE = 1<<1;
     const VISUAL_BLOCK = 1<<2;
     const EXIT_CUR_MODE = 1<<3;
+    const IS_EX_CMD = 1<<4;
   }
 }
 
@@ -153,26 +161,12 @@ impl ViCmd {
     }) && self.motion.is_none()
   }
   pub fn is_line_motion(&self) -> bool {
-    self.motion.as_ref().is_some_and(|m| {
+    self
-      matches!(
+      .motion
-        m.1,
+      .as_ref()
-        Motion::LineUp | Motion::LineDown | Motion::LineUpCharwise | Motion::LineDownCharwise
+      .is_some_and(|m| matches!(m.1, Motion::LineUp | Motion::LineDown))
-      )
-    })
   }
   /// If a ViCmd has a linewise motion, but no verb, we change it to charwise
-  pub fn alter_line_motion_if_no_verb(&mut self) {
-    if self.is_line_motion()
-      && self.verb.is_none()
-      && let Some(motion) = self.motion.as_mut()
-    {
-      match motion.1 {
-        Motion::LineUp => motion.1 = Motion::LineUpCharwise,
-        Motion::LineDown => motion.1 = Motion::LineDownCharwise,
-        _ => unreachable!(),
-      }
-    }
-  }
   pub fn is_mode_transition(&self) -> bool {
     self.verb.as_ref().is_some_and(|v| {
       matches!(
@@ -249,13 +243,16 @@ pub enum Verb {
   Equalize,
   AcceptLineOrNewline,
   EndOfFile,
+	PrintPosition,
   // Ex-mode verbs
   ExMode,
   ShellCmd(String),
   Normal(String),
   Read(ReadSrc),
   Write(WriteDest),
-  Substitute(String, String, super::vimode::ex::SubFlags),
+  Edit(PathBuf),
+  Quit,
+  Substitute(String, String, SubFlags),
   RepeatSubstitute,
   RepeatGlobal,
 }
@@ -301,6 +298,9 @@ impl Verb {
         | Self::JoinLines
         | Self::InsertChar(_)
         | Self::Insert(_)
+        | Self::Dedent
+        | Self::Indent
+        | Self::Equalize
         | Self::Rot13
         | Self::EndOfFile
         | Self::IncrementNumber(_)
@@ -310,47 +310,40 @@ impl Verb {
   pub fn is_char_insert(&self) -> bool {
     matches!(
       self,
-      Self::Change | Self::InsertChar(_) | Self::ReplaceChar(_) | Self::ReplaceCharInplace(_, _)
+      Self::InsertChar(_) | Self::ReplaceChar(_)
     )
   }
 }
 
 #[derive(Debug, Clone, Eq, PartialEq)]
 pub enum Motion {
-  WholeLineInclusive, // whole line including the linebreak
+  WholeLine,
-  WholeLineExclusive, // whole line excluding the linebreak
   TextObj(TextObj),
   EndOfLastWord,
-  BeginningOfFirstWord,
+  StartOfFirstWord,
-  BeginningOfLine,
+  StartOfLine,
   EndOfLine,
   WordMotion(To, Word, Direction),
-  CharSearch(Direction, Dest, char),
+  CharSearch(Direction, Dest, Grapheme),
   BackwardChar,
   ForwardChar,
   BackwardCharForced, // These two variants can cross line boundaries
   ForwardCharForced,
   LineUp,
-  LineUpCharwise,
-  ScreenLineUp,
-  ScreenLineUpCharwise,
   LineDown,
-  LineDownCharwise,
-  ScreenLineDown,
-  ScreenLineDownCharwise,
-  BeginningOfScreenLine,
-  FirstGraphicalOnScreenLine,
-  HalfOfScreen,
-  HalfOfScreenLineText,
   WholeBuffer,
-  BeginningOfBuffer,
+  StartOfBuffer,
   EndOfBuffer,
   ToColumn,
   ToDelimMatch,
+	HalfScreenDown,
+	HalfScreenUp,
   ToBrace(Direction),
   ToBracket(Direction),
   ToParen(Direction),
-  Range(usize, usize),
+  CharRange(Pos, Pos),
+  LineRange(usize, usize),
+  BlockRange(Pos, Pos),
   RepeatMotion,
   RepeatMotionRev,
   Null,
@@ -379,14 +372,8 @@ impl Motion {
   pub fn is_exclusive(&self) -> bool {
     matches!(
       &self,
-      Self::BeginningOfLine
+      Self::StartOfLine
-        | Self::BeginningOfFirstWord
+        | Self::StartOfFirstWord
-        | Self::BeginningOfScreenLine
-        | Self::FirstGraphicalOnScreenLine
-        | Self::LineDownCharwise
-        | Self::LineUpCharwise
-        | Self::ScreenLineUpCharwise
-        | Self::ScreenLineDownCharwise
         | Self::ToColumn
         | Self::TextObj(TextObj::Sentence(_))
         | Self::TextObj(TextObj::Paragraph(_))
@@ -395,21 +382,11 @@ impl Motion {
         | Self::ToBrace(_)
         | Self::ToBracket(_)
         | Self::ToParen(_)
-        | Self::ScreenLineDown
+        | Self::CharRange(_, _)
-        | Self::ScreenLineUp
-        | Self::Range(_, _)
     )
   }
   pub fn is_linewise(&self) -> bool {
-    matches!(
+    matches!(self, Self::WholeLine | Self::LineUp | Self::LineDown)
-      self,
-      Self::WholeLineInclusive
-        | Self::WholeLineExclusive
-        | Self::LineUp
-        | Self::LineDown
-        | Self::ScreenLineDown
-        | Self::ScreenLineUp
-    )
   }
 }
 

src/readline/vimode/ex.rs

@@ -5,7 +5,10 @@ use std::str::Chars;
 use itertools::Itertools;
 
 use crate::bitflags;
+use crate::expand::Expander;
 use crate::libsh::error::{ShErr, ShErrKind, ShResult};
+use crate::parse::lex::TkFlags;
+use crate::readline::history::History;
 use crate::readline::keys::KeyEvent;
 use crate::readline::linebuf::LineBuf;
 use crate::readline::vicmd::{
@@ -33,16 +36,61 @@ bitflags! {
 struct ExEditor {
   buf: LineBuf,
   mode: ViInsert,
+  history: History,
 }
 
 impl ExEditor {
+  pub fn new(history: History) -> Self {
+    Self {
+      history,
+      ..Default::default()
+    }
+  }
   pub fn clear(&mut self) {
     *self = Self::default()
   }
+  pub fn should_grab_history(&mut self, cmd: &ViCmd) -> bool {
+    cmd.verb().is_none()
+      && (cmd
+        .motion()
+        .is_some_and(|m| matches!(m, MotionCmd(_, Motion::LineUp)))
+        && self.buf.start_of_line() == 0)
+      || (cmd
+        .motion()
+        .is_some_and(|m| matches!(m, MotionCmd(_, Motion::LineDown)))
+        && self.buf.on_last_line())
+  }
+  pub fn scroll_history(&mut self, cmd: ViCmd) {
+    let count = &cmd.motion().unwrap().0;
+    let motion = &cmd.motion().unwrap().1;
+    let count = match motion {
+      Motion::LineUp => -(*count as isize),
+      Motion::LineDown => *count as isize,
+      _ => unreachable!(),
+    };
+    let entry = self.history.scroll(count);
+    if let Some(entry) = entry {
+      let buf = std::mem::take(&mut self.buf);
+      self.buf.set_buffer(entry.command().to_string());
+      if self.history.pending.is_none() {
+        self.history.pending = Some(buf);
+      }
+      self.buf.set_hint(None);
+      self.buf.move_cursor_to_end();
+    } else if let Some(pending) = self.history.pending.take() {
+      self.buf = pending;
+    }
+  }
   pub fn handle_key(&mut self, key: KeyEvent) -> ShResult<()> {
     let Some(cmd) = self.mode.handle_key(key) else {
       return Ok(());
     };
+    log::debug!("ExEditor got cmd: {:?}", cmd);
+    if self.should_grab_history(&cmd) {
+      log::debug!("Grabbing history for cmd: {:?}", cmd);
+      self.scroll_history(cmd);
+      return Ok(());
+    }
     self.buf.exec_cmd(cmd)
   }
 }
@@ -53,8 +101,10 @@ pub struct ViEx {
 }
 
 impl ViEx {
-  pub fn new() -> Self {
+  pub fn new(history: History) -> Self {
-    Self::default()
+    Self {
+      pending_cmd: ExEditor::new(history),
+    }
   }
 }
 
@@ -62,48 +112,34 @@ impl ViMode for ViEx {
   // Ex mode can return errors, so we use this fallible method instead of the normal one
   fn handle_key_fallible(&mut self, key: KeyEvent) -> ShResult<Option<ViCmd>> {
     use crate::readline::keys::{KeyCode as C, KeyEvent as E, ModKeys as M};
-    log::debug!("[ViEx] handle_key_fallible: key={:?}", key);
     match key {
       E(C::Char('\r'), M::NONE) | E(C::Enter, M::NONE) => {
-        let input = self.pending_cmd.buf.as_str();
+        let input = self.pending_cmd.buf.joined();
-        log::debug!("[ViEx] Enter pressed, pending_cmd={:?}", input);
+        match parse_ex_cmd(&input) {
-        match parse_ex_cmd(input) {
+          Ok(cmd) => Ok(cmd),
-          Ok(cmd) => {
-            log::debug!("[ViEx] parse_ex_cmd Ok: {:?}", cmd);
-            Ok(cmd)
-          }
           Err(e) => {
-            log::debug!("[ViEx] parse_ex_cmd Err: {:?}", e);
+            let msg = e.unwrap_or(format!("Not an editor command: {}", &input));
-            let msg = e.unwrap_or(format!("Not an editor command: {}", input));
+            write_meta(|m| m.post_status_message(msg.clone()));
-            write_meta(|m| m.post_system_message(msg.clone()));
             Err(ShErr::simple(ShErrKind::ParseErr, msg))
           }
         }
       }
       E(C::Char('C'), M::CTRL) => {
-        log::debug!("[ViEx] Ctrl-C, clearing");
         self.pending_cmd.clear();
         Ok(None)
       }
-      E(C::Esc, M::NONE) => {
+      E(C::Esc, M::NONE) => Ok(Some(ViCmd {
-        log::debug!("[ViEx] Esc, returning to normal mode");
-        Ok(Some(ViCmd {
         register: RegisterName::default(),
         verb: Some(VerbCmd(1, Verb::NormalMode)),
         motion: None,
         flags: CmdFlags::empty(),
         raw_seq: "".into(),
-        }))
+      })),
-      }
+      _ => self.pending_cmd.handle_key(key).map(|_| None),
-      _ => {
-        log::debug!("[ViEx] forwarding key to ExEditor");
-        self.pending_cmd.handle_key(key).map(|_| None)
-      }
     }
   }
   fn handle_key(&mut self, key: KeyEvent) -> Option<ViCmd> {
     let result = self.handle_key_fallible(key);
-    log::debug!("[ViEx] handle_key result: {:?}", result);
     result.ok().flatten()
   }
   fn is_repeatable(&self) -> bool {
@@ -114,16 +150,24 @@ impl ViMode for ViEx {
     None
   }
 
+  fn editor(&mut self) -> Option<&mut LineBuf> {
+    Some(&mut self.pending_cmd.buf)
+  }
+
+  fn history(&mut self) -> Option<&mut History> {
+    Some(&mut self.pending_cmd.history)
+  }
+
   fn cursor_style(&self) -> String {
     "\x1b[3 q".to_string()
   }
 
   fn pending_seq(&self) -> Option<String> {
-    Some(self.pending_cmd.buf.as_str().to_string())
+    Some(self.pending_cmd.buf.joined())
   }
 
   fn pending_cursor(&self) -> Option<usize> {
-    Some(self.pending_cmd.buf.cursor.get())
+    Some(self.pending_cmd.buf.cursor_to_flat())
   }
 
   fn move_cursor_on_undo(&self) -> bool {
@@ -177,15 +221,12 @@ fn parse_ex_cmd(raw: &str) -> Result<Option<ViCmd>, Option<String>> {
     verb,
     motion,
     raw_seq: raw.to_string(),
-    flags: CmdFlags::EXIT_CUR_MODE,
+    flags: CmdFlags::EXIT_CUR_MODE | CmdFlags::IS_EX_CMD,
   }))
 }
 
 /// Unescape shell command arguments
 fn unescape_shell_cmd(cmd: &str) -> String {
-  // The pest grammar uses double quotes for vicut commands
-  // So shell commands need to escape double quotes
-  // We will be removing a single layer of escaping from double quotes
   let mut result = String::new();
   let mut chars = cmd.chars().peekable();
   while let Some(ch) = chars.next() {
@@ -207,7 +248,7 @@ fn parse_ex_command(chars: &mut Peekable<Chars<'_>>) -> Result<Option<Verb>, Opt
   let mut cmd_name = String::new();
 
   while let Some(ch) = chars.peek() {
-    if ch == &'!' {
+    if cmd_name.is_empty() && ch == &'!' {
       cmd_name.push(*ch);
       chars.next();
       break;
@@ -224,12 +265,19 @@ fn parse_ex_command(chars: &mut Peekable<Chars<'_>>) -> Result<Option<Verb>, Opt
       let cmd = unescape_shell_cmd(&cmd);
       Ok(Some(Verb::ShellCmd(cmd)))
     }
+    _ if "help".starts_with(&cmd_name) => {
+      let cmd = "help ".to_string() + chars.collect::<String>().trim();
+			log::debug!("Parsed help command: {}", cmd);
+      Ok(Some(Verb::ShellCmd(cmd)))
+    }
     "normal!" => parse_normal(chars),
     _ if "delete".starts_with(&cmd_name) => Ok(Some(Verb::Delete)),
     _ if "yank".starts_with(&cmd_name) => Ok(Some(Verb::Yank)),
     _ if "put".starts_with(&cmd_name) => Ok(Some(Verb::Put(Anchor::After))),
+    _ if "quit".starts_with(&cmd_name) => Ok(Some(Verb::Quit)),
     _ if "read".starts_with(&cmd_name) => parse_read(chars),
     _ if "write".starts_with(&cmd_name) => parse_write(chars),
+    _ if "edit".starts_with(&cmd_name) => parse_edit(chars),
     _ if "substitute".starts_with(&cmd_name) => parse_substitute(chars),
     _ => Err(None),
   }
@@ -244,6 +292,19 @@ fn parse_normal(chars: &mut Peekable<Chars<'_>>) -> Result<Option<Verb>, Option<
   Ok(Some(Verb::Normal(seq)))
 }
 
+fn parse_edit(chars: &mut Peekable<Chars<'_>>) -> Result<Option<Verb>, Option<String>> {
+  chars
+    .peeking_take_while(|c| c.is_whitespace())
+    .for_each(drop);
+
+  let arg: String = chars.collect();
+  if arg.trim().is_empty() {
+    return Err(Some("Expected file path after ':edit'".into()));
+  }
+  let arg_path = get_path(arg.trim())?;
+  Ok(Some(Verb::Edit(arg_path)))
+}
+
 fn parse_read(chars: &mut Peekable<Chars<'_>>) -> Result<Option<Verb>, Option<String>> {
   chars
     .peeking_take_while(|c| c.is_whitespace())
@@ -266,23 +327,20 @@ fn parse_read(chars: &mut Peekable<Chars<'_>>) -> Result<Option<Verb>, Option<St
   if is_shell_read {
     Ok(Some(Verb::Read(ReadSrc::Cmd(arg))))
   } else {
-    let arg_path = get_path(arg.trim());
+    let arg_path = get_path(arg.trim())?;
     Ok(Some(Verb::Read(ReadSrc::File(arg_path))))
   }
 }
 
-fn get_path(path: &str) -> PathBuf {
+fn get_path(path: &str) -> Result<PathBuf, Option<String>> {
-  if let Some(stripped) = path.strip_prefix("~/")
+  log::debug!("Expanding path: {}", path);
-    && let Some(home) = std::env::var_os("HOME")
+  let expanded = Expander::from_raw(path, TkFlags::empty())
-  {
+    .map_err(|e| Some(format!("Error expanding path: {}", e)))?
-    return PathBuf::from(home).join(stripped);
+    .expand()
-  }
+    .map_err(|e| Some(format!("Error expanding path: {}", e)))?
-  if path == "~"
+    .join(" ");
-    && let Some(home) = std::env::var_os("HOME")
+  log::debug!("Expanded path: {}", expanded);
-  {
+  Ok(PathBuf::from(&expanded))
-    return PathBuf::from(home);
-  }
-  PathBuf::from(path)
 }
 
 fn parse_write(chars: &mut Peekable<Chars<'_>>) -> Result<Option<Verb>, Option<String>> {
@@ -305,7 +363,7 @@ fn parse_write(chars: &mut Peekable<Chars<'_>>) -> Result<Option<Verb>, Option<S
   }
 
   let arg: String = chars.collect();
-  let arg_path = get_path(arg.trim());
+  let arg_path = get_path(arg.trim())?;
 
   let dest = if is_file_append {
     WriteDest::FileAppend(arg_path)

src/readline/vimode/insert.rs

@@ -13,6 +13,10 @@ impl ViInsert {
   pub fn new() -> Self {
     Self::default()
   }
+  pub fn record_cmd(mut self, cmd: ViCmd) -> Self {
+    self.cmds.push(cmd);
+    self
+  }
   pub fn with_count(mut self, repeat_count: u16) -> Self {
     self.repeat_count = repeat_count;
     self
@@ -62,7 +66,9 @@ impl ViMode for ViInsert {
         flags: Default::default(),
       }),
       E(K::Verbatim(seq), _) => {
-				self.pending_cmd.set_verb(VerbCmd(1, Verb::Insert(seq.to_string())));
+        self
+          .pending_cmd
+          .set_verb(VerbCmd(1, Verb::Insert(seq.to_string())));
         self.register_and_return()
       }
       E(K::Char('W'), M::CTRL) => {

src/readline/vimode/mod.rs

@@ -3,7 +3,9 @@ use std::fmt::Display;
 use unicode_segmentation::UnicodeSegmentation;
 
 use crate::libsh::error::ShResult;
+use crate::readline::history::History;
 use crate::readline::keys::{KeyCode as K, KeyEvent as E, ModKeys as M};
+use crate::readline::linebuf::LineBuf;
 use crate::readline::vicmd::{Motion, MotionCmd, To, Verb, VerbCmd, ViCmd};
 
 pub mod ex;
@@ -82,6 +84,12 @@ pub trait ViMode {
   fn pending_cursor(&self) -> Option<usize> {
     None
   }
+  fn editor(&mut self) -> Option<&mut LineBuf> {
+    None
+  }
+  fn history(&mut self) -> Option<&mut History> {
+    None
+  }
   fn move_cursor_on_undo(&self) -> bool;
   fn clamp_cursor(&self) -> bool;
   fn hist_scroll_start_pos(&self) -> Option<To>;
@@ -102,21 +110,22 @@ pub trait ViMode {
 pub fn common_cmds(key: E) -> Option<ViCmd> {
   let mut pending_cmd = ViCmd::new();
   match key {
-    E(K::Home, M::NONE) => pending_cmd.set_motion(MotionCmd(1, Motion::BeginningOfLine)),
+    E(K::Home, M::NONE) => pending_cmd.set_motion(MotionCmd(1, Motion::StartOfLine)),
     E(K::End, M::NONE) => pending_cmd.set_motion(MotionCmd(1, Motion::EndOfLine)),
     E(K::Left, M::NONE) => pending_cmd.set_motion(MotionCmd(1, Motion::BackwardChar)),
     E(K::Right, M::NONE) => pending_cmd.set_motion(MotionCmd(1, Motion::ForwardChar)),
     E(K::Up, M::NONE) => pending_cmd.set_motion(MotionCmd(1, Motion::LineUp)),
     E(K::Down, M::NONE) => pending_cmd.set_motion(MotionCmd(1, Motion::LineDown)),
+    E(K::Enter, M::SHIFT) => pending_cmd.set_verb(VerbCmd(1, Verb::InsertChar('\n'))),
     E(K::Enter, M::NONE) => pending_cmd.set_verb(VerbCmd(1, Verb::AcceptLineOrNewline)),
     E(K::Char('D'), M::CTRL) => pending_cmd.set_verb(VerbCmd(1, Verb::EndOfFile)),
     E(K::Delete, M::NONE) => {
       pending_cmd.set_verb(VerbCmd(1, Verb::Delete));
-      pending_cmd.set_motion(MotionCmd(1, Motion::ForwardChar));
+      pending_cmd.set_motion(MotionCmd(1, Motion::ForwardCharForced));
     }
     E(K::Backspace, M::NONE) | E(K::Char('H'), M::CTRL) => {
       pending_cmd.set_verb(VerbCmd(1, Verb::Delete));
-      pending_cmd.set_motion(MotionCmd(1, Motion::BackwardChar));
+      pending_cmd.set_motion(MotionCmd(1, Motion::BackwardCharForced));
     }
     _ => return None,
   }

src/readline/vimode/normal.rs

@@ -3,6 +3,7 @@ use std::str::Chars;
 
 use super::{CmdReplay, CmdState, ModeReport, ViMode, common_cmds};
 use crate::readline::keys::{KeyCode as K, KeyEvent as E, ModKeys as M};
+use crate::readline::linebuf::Grapheme;
 use crate::readline::vicmd::{
   Anchor, Bound, CmdFlags, Dest, Direction, Motion, MotionCmd, RegisterName, TextObj, To, Verb,
   VerbCmd, ViCmd, Word,
@@ -197,7 +198,7 @@ impl ViNormal {
           return Some(ViCmd {
             register,
             verb: Some(VerbCmd(count, Verb::Change)),
-            motion: Some(MotionCmd(1, Motion::WholeLineExclusive)),
+            motion: Some(MotionCmd(1, Motion::WholeLine)),
             raw_seq: self.take_cmd(),
             flags: self.flags(),
           });
@@ -331,7 +332,7 @@ impl ViNormal {
           return Some(ViCmd {
             register,
             verb: Some(VerbCmd(count, Verb::InsertMode)),
-            motion: Some(MotionCmd(1, Motion::BeginningOfFirstWord)),
+            motion: Some(MotionCmd(1, Motion::StartOfFirstWord)),
             raw_seq: self.take_cmd(),
             flags: self.flags(),
           });
@@ -411,10 +412,10 @@ impl ViNormal {
         | ('~', Some(VerbCmd(_, Verb::ToggleCaseRange)))
         | ('>', Some(VerbCmd(_, Verb::Indent)))
         | ('<', Some(VerbCmd(_, Verb::Dedent))) => {
-          break 'motion_parse Some(MotionCmd(count, Motion::WholeLineInclusive));
+          break 'motion_parse Some(MotionCmd(count, Motion::WholeLine));
         }
         ('c', Some(VerbCmd(_, Verb::Change))) => {
-          break 'motion_parse Some(MotionCmd(count, Motion::WholeLineExclusive));
+          break 'motion_parse Some(MotionCmd(count, Motion::WholeLine));
         }
         ('W', Some(VerbCmd(_, Verb::Change))) => {
           // Same with 'W'
@@ -434,7 +435,7 @@ impl ViNormal {
             'g' => {
               chars_clone.next();
               chars = chars_clone;
-              break 'motion_parse Some(MotionCmd(count, Motion::BeginningOfBuffer));
+              break 'motion_parse Some(MotionCmd(count, Motion::StartOfBuffer));
             }
             'e' => {
               chars = chars_clone;
@@ -450,26 +451,10 @@ impl ViNormal {
                 Motion::WordMotion(To::End, Word::Big, Direction::Backward),
               ));
             }
-            'k' => {
-              chars = chars_clone;
-              break 'motion_parse Some(MotionCmd(count, Motion::ScreenLineUp));
-            }
-            'j' => {
-              chars = chars_clone;
-              break 'motion_parse Some(MotionCmd(count, Motion::ScreenLineDown));
-            }
             '_' => {
               chars = chars_clone;
               break 'motion_parse Some(MotionCmd(count, Motion::EndOfLastWord));
             }
-            '0' => {
-              chars = chars_clone;
-              break 'motion_parse Some(MotionCmd(count, Motion::BeginningOfScreenLine));
-            }
-            '^' => {
-              chars = chars_clone;
-              break 'motion_parse Some(MotionCmd(count, Motion::FirstGraphicalOnScreenLine));
-            }
             _ => return self.quit_parse(),
           }
         }
@@ -551,7 +536,7 @@ impl ViNormal {
 
           break 'motion_parse Some(MotionCmd(
             count,
-            Motion::CharSearch(Direction::Forward, Dest::On, *ch),
+            Motion::CharSearch(Direction::Forward, Dest::On, Grapheme::from(*ch)),
           ));
         }
         'F' => {
@@ -561,7 +546,7 @@ impl ViNormal {
 
           break 'motion_parse Some(MotionCmd(
             count,
-            Motion::CharSearch(Direction::Backward, Dest::On, *ch),
+            Motion::CharSearch(Direction::Backward, Dest::On, Grapheme::from(*ch)),
           ));
         }
         't' => {
@@ -571,7 +556,7 @@ impl ViNormal {
 
           break 'motion_parse Some(MotionCmd(
             count,
-            Motion::CharSearch(Direction::Forward, Dest::Before, *ch),
+            Motion::CharSearch(Direction::Forward, Dest::Before, Grapheme::from(*ch)),
           ));
         }
         'T' => {
@@ -581,7 +566,7 @@ impl ViNormal {
 
           break 'motion_parse Some(MotionCmd(
             count,
-            Motion::CharSearch(Direction::Backward, Dest::Before, *ch),
+            Motion::CharSearch(Direction::Backward, Dest::Before, Grapheme::from(*ch)),
           ));
         }
         ';' => {
@@ -598,11 +583,11 @@ impl ViNormal {
         }
         '^' => {
           chars = chars_clone;
-          break 'motion_parse Some(MotionCmd(count, Motion::BeginningOfFirstWord));
+          break 'motion_parse Some(MotionCmd(count, Motion::StartOfFirstWord));
         }
         '0' => {
           chars = chars_clone;
-          break 'motion_parse Some(MotionCmd(count, Motion::BeginningOfLine));
+          break 'motion_parse Some(MotionCmd(count, Motion::StartOfLine));
         }
         '$' => {
           chars = chars_clone;
@@ -791,6 +776,36 @@ impl ViMode for ViNormal {
           flags: self.flags(),
         })
       }
+      E(K::Char('G'), M::CTRL) => {
+        self.pending_seq.clear();
+        Some(ViCmd {
+          register: Default::default(),
+          verb: Some(VerbCmd(1, Verb::PrintPosition)),
+          motion: None,
+          raw_seq: "".into(),
+          flags: self.flags(),
+        })
+      }
+      E(K::Char('D'), M::CTRL) => {
+        self.pending_seq.clear();
+        Some(ViCmd {
+          register: Default::default(),
+          verb: None,
+          motion: Some(MotionCmd(1, Motion::HalfScreenDown)),
+          raw_seq: "".into(),
+          flags: self.flags(),
+        })
+      }
+      E(K::Char('U'), M::CTRL) => {
+        self.pending_seq.clear();
+        Some(ViCmd {
+          register: Default::default(),
+          verb: None,
+          motion: Some(MotionCmd(1, Motion::HalfScreenUp)),
+          raw_seq: "".into(),
+          flags: self.flags(),
+        })
+      }
 
       E(K::Char(ch), M::NONE) => self.try_parse(ch),
       E(K::Backspace, M::NONE) => Some(ViCmd {

src/readline/vimode/verbatim.rs

@@ -4,19 +4,11 @@ use crate::readline::vicmd::{CmdFlags, RegisterName, To, Verb, VerbCmd, ViCmd};
 
 #[derive(Default, Clone, Debug)]
 pub struct ViVerbatim {
-	pending_seq: String,
   sent_cmd: Vec<ViCmd>,
   repeat_count: u16,
-	read_one: bool
 }
 
 impl ViVerbatim {
-	pub fn read_one() -> Self {
-		Self {
-			read_one: true,
-			..Self::default()
-		}
-	}
   pub fn new() -> Self {
     Self::default()
   }
@@ -31,7 +23,7 @@ impl ViVerbatim {
 impl ViMode for ViVerbatim {
   fn handle_key(&mut self, key: E) -> Option<ViCmd> {
     match key {
-      E(K::Verbatim(seq), _mods) if self.read_one => {
+      E(K::Verbatim(seq), _mods) => {
         log::debug!("Received verbatim key sequence: {:?}", seq);
         let cmd = ViCmd {
           register: RegisterName::default(),
@@ -43,22 +35,6 @@ impl ViMode for ViVerbatim {
         self.sent_cmd.push(cmd.clone());
         Some(cmd)
       }
-			E(K::Verbatim(seq), _mods) => {
-				self.pending_seq.push_str(&seq);
-				None
-			}
-			E(K::BracketedPasteEnd, _mods) => {
-				log::debug!("Received verbatim paste: {:?}", self.pending_seq);
-				let cmd = ViCmd {
-					register: RegisterName::default(),
-					verb: Some(VerbCmd(1, Verb::Insert(self.pending_seq.clone()))),
-					motion: None,
-					raw_seq: std::mem::take(&mut self.pending_seq),
-					flags: CmdFlags::EXIT_CUR_MODE,
-				};
-				self.sent_cmd.push(cmd.clone());
-				Some(cmd)
-			}
       _ => common_cmds(key),
     }
   }

src/readline/vimode/visual.rs

@@ -3,6 +3,7 @@ use std::str::Chars;
 
 use super::{CmdReplay, CmdState, ModeReport, ViMode, common_cmds};
 use crate::readline::keys::{KeyCode as K, KeyEvent as E, ModKeys as M};
+use crate::readline::linebuf::Grapheme;
 use crate::readline::vicmd::{
   Anchor, Bound, CmdFlags, Dest, Direction, Motion, MotionCmd, RegisterName, TextObj, To, Verb,
   VerbCmd, ViCmd, Word,
@@ -146,7 +147,7 @@ impl ViVisual {
           return Some(ViCmd {
             register,
             verb: Some(VerbCmd(1, Verb::Delete)),
-            motion: Some(MotionCmd(1, Motion::WholeLineInclusive)),
+            motion: Some(MotionCmd(1, Motion::WholeLine)),
             raw_seq: self.take_cmd(),
             flags: CmdFlags::empty(),
           });
@@ -155,7 +156,7 @@ impl ViVisual {
           return Some(ViCmd {
             register,
             verb: Some(VerbCmd(1, Verb::Yank)),
-            motion: Some(MotionCmd(1, Motion::WholeLineInclusive)),
+            motion: Some(MotionCmd(1, Motion::WholeLine)),
             raw_seq: self.take_cmd(),
             flags: CmdFlags::empty(),
           });
@@ -164,7 +165,7 @@ impl ViVisual {
           return Some(ViCmd {
             register,
             verb: Some(VerbCmd(1, Verb::Delete)),
-            motion: Some(MotionCmd(1, Motion::WholeLineInclusive)),
+            motion: Some(MotionCmd(1, Motion::WholeLine)),
             raw_seq: self.take_cmd(),
             flags: CmdFlags::empty(),
           });
@@ -173,7 +174,7 @@ impl ViVisual {
           return Some(ViCmd {
             register,
             verb: Some(VerbCmd(1, Verb::Change)),
-            motion: Some(MotionCmd(1, Motion::WholeLineExclusive)),
+            motion: Some(MotionCmd(1, Motion::WholeLine)),
             raw_seq: self.take_cmd(),
             flags: CmdFlags::empty(),
           });
@@ -182,7 +183,7 @@ impl ViVisual {
           return Some(ViCmd {
             register,
             verb: Some(VerbCmd(1, Verb::Indent)),
-            motion: Some(MotionCmd(1, Motion::WholeLineInclusive)),
+            motion: Some(MotionCmd(1, Motion::WholeLine)),
             raw_seq: self.take_cmd(),
             flags: CmdFlags::empty(),
           });
@@ -191,7 +192,7 @@ impl ViVisual {
           return Some(ViCmd {
             register,
             verb: Some(VerbCmd(1, Verb::Dedent)),
-            motion: Some(MotionCmd(1, Motion::WholeLineInclusive)),
+            motion: Some(MotionCmd(1, Motion::WholeLine)),
             raw_seq: self.take_cmd(),
             flags: CmdFlags::empty(),
           });
@@ -200,7 +201,7 @@ impl ViVisual {
           return Some(ViCmd {
             register,
             verb: Some(VerbCmd(1, Verb::Equalize)),
-            motion: Some(MotionCmd(1, Motion::WholeLineInclusive)),
+            motion: Some(MotionCmd(1, Motion::WholeLine)),
             raw_seq: self.take_cmd(),
             flags: CmdFlags::empty(),
           });
@@ -237,6 +238,24 @@ impl ViVisual {
             flags: CmdFlags::empty(),
           });
         }
+        's' => {
+          return Some(ViCmd {
+            register,
+            verb: Some(VerbCmd(count, Verb::Delete)),
+            motion: None,
+            raw_seq: self.take_cmd(),
+            flags: CmdFlags::empty(),
+          });
+        }
+        'S' => {
+          return Some(ViCmd {
+            register,
+            verb: Some(VerbCmd(count, Verb::Change)),
+            motion: None,
+            raw_seq: self.take_cmd(),
+            flags: CmdFlags::empty(),
+          });
+        }
         'U' => {
           return Some(ViCmd {
             register,
@@ -268,7 +287,7 @@ impl ViVisual {
           return Some(ViCmd {
             register,
             verb: Some(VerbCmd(count, Verb::InsertMode)),
-            motion: Some(MotionCmd(1, Motion::BeginningOfLine)),
+            motion: Some(MotionCmd(1, Motion::StartOfLine)),
             raw_seq: self.take_cmd(),
             flags: CmdFlags::empty(),
           });
@@ -283,8 +302,13 @@ impl ViVisual {
           });
         }
         'y' => {
-          chars = chars_clone;
+          return Some(ViCmd {
-          break 'verb_parse Some(VerbCmd(count, Verb::Yank));
+            register,
+            verb: Some(VerbCmd(count, Verb::Yank)),
+            motion: None,
+            raw_seq: self.take_cmd(),
+            flags: CmdFlags::empty(),
+          });
         }
         'd' => {
           chars = chars_clone;
@@ -321,10 +345,10 @@ impl ViVisual {
         | ('=', Some(VerbCmd(_, Verb::Equalize)))
         | ('>', Some(VerbCmd(_, Verb::Indent)))
         | ('<', Some(VerbCmd(_, Verb::Dedent))) => {
-          break 'motion_parse Some(MotionCmd(count, Motion::WholeLineInclusive));
+          break 'motion_parse Some(MotionCmd(count, Motion::WholeLine));
         }
         ('c', Some(VerbCmd(_, Verb::Change))) => {
-          break 'motion_parse Some(MotionCmd(count, Motion::WholeLineExclusive));
+          break 'motion_parse Some(MotionCmd(count, Motion::WholeLine));
         }
         _ => {}
       }
@@ -335,7 +359,7 @@ impl ViVisual {
               'g' => {
                 chars_clone.next();
                 chars = chars_clone;
-                break 'motion_parse Some(MotionCmd(count, Motion::BeginningOfBuffer));
+                break 'motion_parse Some(MotionCmd(count, Motion::StartOfBuffer));
               }
               'e' => {
                 chars_clone.next();
@@ -353,16 +377,6 @@ impl ViVisual {
                   Motion::WordMotion(To::End, Word::Big, Direction::Backward),
                 ));
               }
-              'k' => {
-                chars_clone.next();
-                chars = chars_clone;
-                break 'motion_parse Some(MotionCmd(count, Motion::ScreenLineUp));
-              }
-              'j' => {
-                chars_clone.next();
-                chars = chars_clone;
-                break 'motion_parse Some(MotionCmd(count, Motion::ScreenLineDown));
-              }
               _ => return self.quit_parse(),
             }
           } else {
@@ -412,7 +426,7 @@ impl ViVisual {
 
           break 'motion_parse Some(MotionCmd(
             count,
-            Motion::CharSearch(Direction::Forward, Dest::On, *ch),
+            Motion::CharSearch(Direction::Forward, Dest::On, Grapheme::from(*ch)),
           ));
         }
         'F' => {
@@ -422,7 +436,7 @@ impl ViVisual {
 
           break 'motion_parse Some(MotionCmd(
             count,
-            Motion::CharSearch(Direction::Backward, Dest::On, *ch),
+            Motion::CharSearch(Direction::Backward, Dest::On, Grapheme::from(*ch)),
           ));
         }
         't' => {
@@ -432,7 +446,7 @@ impl ViVisual {
 
           break 'motion_parse Some(MotionCmd(
             count,
-            Motion::CharSearch(Direction::Forward, Dest::Before, *ch),
+            Motion::CharSearch(Direction::Forward, Dest::Before, Grapheme::from(*ch)),
           ));
         }
         'T' => {
@@ -442,7 +456,7 @@ impl ViVisual {
 
           break 'motion_parse Some(MotionCmd(
             count,
-            Motion::CharSearch(Direction::Backward, Dest::Before, *ch),
+            Motion::CharSearch(Direction::Backward, Dest::Before, Grapheme::from(*ch)),
           ));
         }
         ';' => {
@@ -459,7 +473,7 @@ impl ViVisual {
         }
         '0' => {
           chars = chars_clone;
-          break 'motion_parse Some(MotionCmd(count, Motion::BeginningOfLine));
+          break 'motion_parse Some(MotionCmd(count, Motion::StartOfLine));
         }
         '$' => {
           chars = chars_clone;
@@ -649,6 +663,36 @@ impl ViMode for ViVisual {
           flags: CmdFlags::empty(),
         })
       }
+      E(K::Char('G'), M::CTRL) => {
+        self.pending_seq.clear();
+        Some(ViCmd {
+          register: Default::default(),
+          verb: Some(VerbCmd(1, Verb::PrintPosition)),
+          motion: None,
+          raw_seq: "".into(),
+          flags: CmdFlags::empty()
+        })
+      }
+      E(K::Char('D'), M::CTRL) => {
+        self.pending_seq.clear();
+        Some(ViCmd {
+          register: Default::default(),
+          verb: None,
+          motion: Some(MotionCmd(1, Motion::HalfScreenDown)),
+          raw_seq: "".into(),
+          flags: CmdFlags::empty(),
+        })
+      }
+      E(K::Char('U'), M::CTRL) => {
+        self.pending_seq.clear();
+        Some(ViCmd {
+          register: Default::default(),
+          verb: None,
+          motion: Some(MotionCmd(1, Motion::HalfScreenUp)),
+          raw_seq: "".into(),
+          flags: CmdFlags::empty(),
+        })
+      }
       E(K::Char('R'), M::CTRL) => {
         let mut chars = self.pending_seq.chars().peekable();
         let count = self.parse_count(&mut chars).unwrap_or(1);

src/shopt.rs

@@ -2,6 +2,35 @@ use std::{fmt::Display, str::FromStr};
 
 use crate::libsh::error::{ShErr, ShErrKind, ShResult};
 
+/// Escapes a string for embedding inside single quotes.
+/// Only escapes unescaped `\` and `'` characters.
+pub fn escape_for_single_quote(s: &str) -> String {
+  let mut result = String::with_capacity(s.len());
+  let mut chars = s.chars().peekable();
+  while let Some(ch) = chars.next() {
+    if ch == '\\' {
+      match chars.peek() {
+        Some(&'\\') | Some(&'\'') => {
+          // Already escaped — pass through both characters
+          result.push(ch);
+          result.push(chars.next().unwrap());
+        }
+        _ => {
+          // Lone backslash — escape it
+          result.push('\\');
+          result.push('\\');
+        }
+      }
+    } else if ch == '\'' {
+      result.push('\\');
+      result.push('\'');
+    } else {
+      result.push(ch);
+    }
+  }
+  result
+}
+
 #[derive(Clone, Copy, Debug)]
 pub enum ShedBellStyle {
   Audible,
@@ -24,49 +53,113 @@ impl FromStr for ShedBellStyle {
   }
 }
 
-#[derive(Default, Clone, Copy, Debug)]
+/// Generates a shopt group struct with `set`, `get`, `Display`, and `Default` impls.
-pub enum ShedEditMode {
+///
-  #[default]
+/// Doc comments on each field become the description shown by `shopt get`.
-  Vi,
+/// Every field type must implement `FromStr + Display`.
-  Emacs,
+///
-}
+/// Optional per-field validation: `#[validate(|val| expr)]` runs after parsing
+/// and must return `Result<(), String>` where the error string is the message.
+macro_rules! shopt_group {
+  (
+    $(#[$struct_meta:meta])*
+    pub struct $name:ident ($group_name:literal) {
+      $(
+        $(#[doc = $desc:literal])*
+        $(#[validate($validator:expr)])?
+        $field:ident : $ty:ty = $default:expr
+      ),* $(,)?
+    }
+  ) => {
+    $(#[$struct_meta])*
+    pub struct $name {
+      $(pub $field: $ty,)*
+    }
 
-impl FromStr for ShedEditMode {
+    impl Default for $name {
-  type Err = ShErr;
+      fn default() -> Self {
-  fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Self {
-    match s.to_ascii_lowercase().as_str() {
+          $($field: $default,)*
-      "vi" => Ok(Self::Vi),
+        }
-      "emacs" => Ok(Self::Emacs),
+      }
+    }
+
+    impl $name {
+      pub fn set(&mut self, opt: &str, val: &str) -> ShResult<()> {
+        match opt {
+          $(
+            stringify!($field) => {
+              let parsed = val.parse::<$ty>().map_err(|_| {
+                ShErr::simple(
+                  ShErrKind::SyntaxErr,
+                  format!("shopt: invalid value '{}' for {}.{}", val, $group_name, opt),
+                )
+              })?;
+              $(
+                let validate: fn(&$ty) -> Result<(), String> = $validator;
+                validate(&parsed).map_err(|msg| {
+                  ShErr::simple(ShErrKind::SyntaxErr, format!("shopt: {msg}"))
+                })?;
+              )?
+              self.$field = parsed;
+            }
+          )*
+          _ => {
+            return Err(ShErr::simple(
+              ShErrKind::SyntaxErr,
+              format!("shopt: unexpected '{}' option '{opt}'", $group_name),
+            ));
+          }
+        }
+        Ok(())
+      }
+
+      pub fn get(&self, query: &str) -> ShResult<Option<String>> {
+        if query.is_empty() {
+          return Ok(Some(format!("{self}")));
+        }
+        match query {
+          $(
+            stringify!($field) => {
+              let desc = concat!($($desc, "\n",)*);
+              let output = format!("{}{}", desc, self.$field);
+              Ok(Some(output))
+            }
+          )*
           _ => Err(ShErr::simple(
             ShErrKind::SyntaxErr,
-        format!("Invalid edit mode '{s}'"),
+            format!("shopt: unexpected '{}' option '{query}'", $group_name),
           )),
         }
       }
-}
+    }
 
-impl Display for ShedEditMode {
+    impl Display for $name {
       fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-    match self {
+        let output = [
-      ShedEditMode::Vi => write!(f, "vi"),
+          $(format!("{}.{}='{}'", $group_name, stringify!($field),
-      ShedEditMode::Emacs => write!(f, "emacs"),
+            $crate::shopt::escape_for_single_quote(&self.$field.to_string())),)*
+        ];
+        writeln!(f, "{}", output.join("\n"))
       }
     }
+  };
 }
 
 #[derive(Clone, Debug)]
 pub struct ShOpts {
   pub core: ShOptCore,
+	pub line: ShOptLine,
   pub prompt: ShOptPrompt,
 }
 
 impl Default for ShOpts {
   fn default() -> Self {
     let core = ShOptCore::default();
-
+		let line = ShOptLine::default();
     let prompt = ShOptPrompt::default();
 
-    Self { core, prompt }
+    Self { core, line,  prompt }
   }
 }
 
@@ -82,8 +175,9 @@ impl ShOpts {
 
   pub fn display_opts(&mut self) -> ShResult<String> {
     let output = [
-      format!("core:\n{}", self.query("core")?.unwrap_or_default()),
+      self.query("core")?.unwrap_or_default().to_string(),
-      format!("prompt:\n{}", self.query("prompt")?.unwrap_or_default()),
+			self.query("line")?.unwrap_or_default().to_string(),
+      self.query("prompt")?.unwrap_or_default().to_string(),
     ];
 
     Ok(output.join("\n"))
@@ -102,6 +196,7 @@ impl ShOpts {
 
     match key {
       "core" => self.core.set(&remainder, val)?,
+			"line" => self.line.set(&remainder, val)?,
       "prompt" => self.prompt.set(&remainder, val)?,
       _ => {
         return Err(ShErr::simple(
@@ -126,6 +221,7 @@ impl ShOpts {
 
     match key {
       "core" => self.core.get(&remainder),
+			"line" => self.line.get(&remainder),
       "prompt" => self.prompt.get(&remainder),
       _ => Err(ShErr::simple(
         ShErrKind::SyntaxErr,
@@ -135,409 +231,88 @@ impl ShOpts {
   }
 }
 
-#[derive(Clone, Debug)]
+shopt_group! {
-pub struct ShOptCore {
+  #[derive(Clone, Debug)]
-  pub dotglob: bool,
+	pub struct ShOptLine ("line") {
-  pub autocd: bool,
+		/// The maximum height of the line editor viewport window. Can be a positive number or a percentage of terminal height like "50%"
-  pub hist_ignore_dupes: bool,
+		viewport_height: String = "50%".to_string(),
-  pub max_hist: isize,
+		/// The line offset from the top or bottom of the viewport to trigger scrolling
-  pub interactive_comments: bool,
+		scroll_offset: usize = 2,
-  pub auto_hist: bool,
+	}
-  pub bell_enabled: bool,
-  pub max_recurse_depth: usize,
-  pub xpg_echo: bool,
 }
 
-impl ShOptCore {
+shopt_group! {
-  pub fn set(&mut self, opt: &str, val: &str) -> ShResult<()> {
+  #[derive(Clone, Debug)]
-    match opt {
+  pub struct ShOptCore ("core") {
-      "dotglob" => {
+    /// Include hidden files in glob patterns
-        let Ok(val) = val.parse::<bool>() else {
+    dotglob: bool = false,
-          return Err(ShErr::simple(
+
-            ShErrKind::SyntaxErr,
+    /// Allow navigation to directories by passing the directory as a command directly
-            "shopt: expected 'true' or 'false' for dotglob value",
+    autocd: bool = false,
-          ));
+
-        };
+    /// Ignore consecutive duplicate command history entries
-        self.dotglob = val;
+    hist_ignore_dupes: bool = true,
-      }
+
-      "autocd" => {
+    /// Maximum number of entries in the command history file (-1 for unlimited)
-        let Ok(val) = val.parse::<bool>() else {
+    #[validate(|v: &isize| if *v < -1 {
-          return Err(ShErr::simple(
+      Err("expected a non-negative integer or -1 for max_hist value".into())
-            ShErrKind::SyntaxErr,
+    } else {
-            "shopt: expected 'true' or 'false' for autocd value",
-          ));
-        };
-        self.autocd = val;
-      }
-      "hist_ignore_dupes" => {
-        let Ok(val) = val.parse::<bool>() else {
-          return Err(ShErr::simple(
-            ShErrKind::SyntaxErr,
-            "shopt: expected 'true' or 'false' for hist_ignore_dupes value",
-          ));
-        };
-        self.hist_ignore_dupes = val;
-      }
-      "max_hist" => {
-        let Ok(val) = val.parse::<isize>() else {
-          return Err(ShErr::simple(
-            ShErrKind::SyntaxErr,
-            "shopt: expected an integer for max_hist value (-1 for unlimited)",
-          ));
-        };
-				if val < -1 {
-					return Err(ShErr::simple(
-						ShErrKind::SyntaxErr,
-						"shopt: expected a non-negative integer or -1 for max_hist value",
-					));
-				}
-        self.max_hist = val;
-      }
-      "interactive_comments" => {
-        let Ok(val) = val.parse::<bool>() else {
-          return Err(ShErr::simple(
-            ShErrKind::SyntaxErr,
-            "shopt: expected 'true' or 'false' for interactive_comments value",
-          ));
-        };
-        self.interactive_comments = val;
-      }
-      "auto_hist" => {
-        let Ok(val) = val.parse::<bool>() else {
-          return Err(ShErr::simple(
-            ShErrKind::SyntaxErr,
-            "shopt: expected 'true' or 'false' for auto_hist value",
-          ));
-        };
-        self.auto_hist = val;
-      }
-      "bell_enabled" => {
-        let Ok(val) = val.parse::<bool>() else {
-          return Err(ShErr::simple(
-            ShErrKind::SyntaxErr,
-            "shopt: expected 'true' or 'false' for bell_enabled value",
-          ));
-        };
-        self.bell_enabled = val;
-      }
-      "max_recurse_depth" => {
-        let Ok(val) = val.parse::<usize>() else {
-          return Err(ShErr::simple(
-            ShErrKind::SyntaxErr,
-            "shopt: expected a positive integer for max_recurse_depth value",
-          ));
-        };
-        self.max_recurse_depth = val;
-      }
-      "xpg_echo" => {
-        let Ok(val) = val.parse::<bool>() else {
-          return Err(ShErr::simple(
-            ShErrKind::SyntaxErr,
-            "shopt: expected 'true' or 'false' for xpg_echo value",
-          ));
-        };
-        self.xpg_echo = val;
-      }
-      _ => {
-        return Err(ShErr::simple(
-          ShErrKind::SyntaxErr,
-          format!("shopt: Unexpected 'core' option '{opt}'"),
-        ));
-      }
-    }
       Ok(())
-  }
+    })]
-  pub fn get(&self, query: &str) -> ShResult<Option<String>> {
+    max_hist: isize = 10_000,
-    if query.is_empty() {
-      return Ok(Some(format!("{self}")));
-    }
 
-    match query {
+    /// Whether or not to allow comments in interactive mode
-      "dotglob" => {
+    interactive_comments: bool = true,
-        let mut output = String::from("Include hidden files in glob patterns\n");
+
-        output.push_str(&format!("{}", self.dotglob));
+    /// Whether or not to automatically save commands to the command history file
-        Ok(Some(output))
+    auto_hist: bool = true,
-      }
+
-      "autocd" => {
+    /// Whether or not to allow shed to trigger the terminal bell
-        let mut output = String::from(
+    bell_enabled: bool = true,
-          "Allow navigation to directories by passing the directory as a command directly\n",
+
-        );
+    /// Maximum limit of recursive shell function calls
-        output.push_str(&format!("{}", self.autocd));
+    max_recurse_depth: usize = 1000,
-        Ok(Some(output))
+
-      }
+    /// Whether echo expands escape sequences by default
-      "hist_ignore_dupes" => {
+    xpg_echo: bool = false,
-        let mut output = String::from("Ignore consecutive duplicate command history entries\n");
+
-        output.push_str(&format!("{}", self.hist_ignore_dupes));
+    /// Prevent > from overwriting existing files (use >| to override)
-        Ok(Some(output))
+    noclobber: bool = false,
-      }
-      "max_hist" => {
-        let mut output = String::from(
-          "Maximum number of entries in the command history file (-1 for unlimited)\n",
-        );
-        output.push_str(&format!("{}", self.max_hist));
-        Ok(Some(output))
-      }
-      "interactive_comments" => {
-        let mut output = String::from("Whether or not to allow comments in interactive mode\n");
-        output.push_str(&format!("{}", self.interactive_comments));
-        Ok(Some(output))
-      }
-      "auto_hist" => {
-        let mut output = String::from(
-          "Whether or not to automatically save commands to the command history file\n",
-        );
-        output.push_str(&format!("{}", self.auto_hist));
-        Ok(Some(output))
-      }
-      "bell_enabled" => {
-        let mut output = String::from("Whether or not to allow shed to trigger the terminal bell");
-        output.push_str(&format!("{}", self.bell_enabled));
-        Ok(Some(output))
-      }
-      "max_recurse_depth" => {
-        let mut output = String::from("Maximum limit of recursive shell function calls\n");
-        output.push_str(&format!("{}", self.max_recurse_depth));
-        Ok(Some(output))
-      }
-      "xpg_echo" => {
-        let mut output = String::from("Whether echo expands escape sequences by default\n");
-        output.push_str(&format!("{}", self.xpg_echo));
-        Ok(Some(output))
-      }
-      _ => Err(ShErr::simple(
-        ShErrKind::SyntaxErr,
-        format!("shopt: Unexpected 'core' option '{query}'"),
-      )),
-    }
   }
 }
 
-impl Display for ShOptCore {
+shopt_group! {
-  fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+  #[derive(Clone, Debug)]
-    let mut output = vec![];
+  pub struct ShOptPrompt ("prompt") {
-    output.push(format!("dotglob = {}", self.dotglob));
+    /// Maximum number of path segments used in the '\W' prompt escape sequence
-    output.push(format!("autocd = {}", self.autocd));
+    trunc_prompt_path: usize = 4,
-    output.push(format!("hist_ignore_dupes = {}", self.hist_ignore_dupes));
-    output.push(format!("max_hist = {}", self.max_hist));
-    output.push(format!(
-      "interactive_comments = {}",
-      self.interactive_comments
-    ));
-    output.push(format!("auto_hist = {}", self.auto_hist));
-    output.push(format!("bell_enabled = {}", self.bell_enabled));
-    output.push(format!("max_recurse_depth = {}", self.max_recurse_depth));
-    output.push(format!("xpg_echo = {}", self.xpg_echo));
 
-    let final_output = output.join("\n");
+    /// Maximum number of completion candidates displayed upon pressing tab
+    comp_limit: usize = 100,
 
-    writeln!(f, "{final_output}")
+    /// Whether to enable or disable syntax highlighting on the prompt
-  }
+    highlight: bool = true,
-}
 
-impl Default for ShOptCore {
+    /// Whether to automatically indent new lines in multiline commands
-  fn default() -> Self {
+    auto_indent: bool = true,
-    ShOptCore {
-      dotglob: false,
-      autocd: false,
-      hist_ignore_dupes: true,
-      max_hist: 10_000,
-      interactive_comments: true,
-      auto_hist: true,
-      bell_enabled: true,
-      max_recurse_depth: 1000,
-      xpg_echo: false,
-    }
-  }
-}
 
-#[derive(Clone, Debug)]
+    /// Whether to automatically insert a newline when the input is incomplete
-pub struct ShOptPrompt {
+    linebreak_on_incomplete: bool = true,
-  pub trunc_prompt_path: usize,
-  pub edit_mode: ShedEditMode,
-  pub comp_limit: usize,
-  pub highlight: bool,
-  pub auto_indent: bool,
-  pub linebreak_on_incomplete: bool,
-  pub leader: String,
-  pub line_numbers: bool,
-}
 
-impl ShOptPrompt {
+    /// The leader key sequence used in keymap bindings
-  pub fn set(&mut self, opt: &str, val: &str) -> ShResult<()> {
+    leader: String = " ".to_string(),
-    match opt {
-      "trunc_prompt_path" => {
-        let Ok(val) = val.parse::<usize>() else {
-          return Err(ShErr::simple(
-            ShErrKind::SyntaxErr,
-            "shopt: expected a positive integer for trunc_prompt_path value",
-          ));
-        };
-        self.trunc_prompt_path = val;
-      }
-      "edit_mode" => {
-        let Ok(val) = val.parse::<ShedEditMode>() else {
-          return Err(ShErr::simple(
-            ShErrKind::SyntaxErr,
-            "shopt: expected 'vi' or 'emacs' for edit_mode value",
-          ));
-        };
-        self.edit_mode = val;
-      }
-      "comp_limit" => {
-        let Ok(val) = val.parse::<usize>() else {
-          return Err(ShErr::simple(
-            ShErrKind::SyntaxErr,
-            "shopt: expected a positive integer for comp_limit value",
-          ));
-        };
-        self.comp_limit = val;
-      }
-      "highlight" => {
-        let Ok(val) = val.parse::<bool>() else {
-          return Err(ShErr::simple(
-            ShErrKind::SyntaxErr,
-            "shopt: expected 'true' or 'false' for highlight value",
-          ));
-        };
-        self.highlight = val;
-      }
-      "auto_indent" => {
-        let Ok(val) = val.parse::<bool>() else {
-          return Err(ShErr::simple(
-            ShErrKind::SyntaxErr,
-            "shopt: expected 'true' or 'false' for auto_indent value",
-          ));
-        };
-        self.auto_indent = val;
-      }
-      "linebreak_on_incomplete" => {
-        let Ok(val) = val.parse::<bool>() else {
-          return Err(ShErr::simple(
-            ShErrKind::SyntaxErr,
-            "shopt: expected 'true' or 'false' for linebreak_on_incomplete value",
-          ));
-        };
-        self.linebreak_on_incomplete = val;
-      }
-      "leader" => {
-        self.leader = val.to_string();
-      }
-      "line_numbers" => {
-        let Ok(val) = val.parse::<bool>() else {
-          return Err(ShErr::simple(
-            ShErrKind::SyntaxErr,
-            "shopt: expected 'true' or 'false' for line_numbers value",
-          ));
-        };
-        self.line_numbers = val;
-      }
-      "custom" => {
-        todo!()
-      }
-      _ => {
-        return Err(ShErr::simple(
-          ShErrKind::SyntaxErr,
-          format!("shopt: Unexpected 'prompt' option '{opt}'"),
-        ));
-      }
-    }
-    Ok(())
-  }
-  pub fn get(&self, query: &str) -> ShResult<Option<String>> {
-    if query.is_empty() {
-      return Ok(Some(format!("{self}")));
-    }
 
-    match query {
+    /// Whether to display line numbers in multiline input
-      "trunc_prompt_path" => {
+    line_numbers: bool = true,
-        let mut output = String::from(
-          "Maximum number of path segments used in the '\\W' prompt escape sequence\n",
-        );
-        output.push_str(&format!("{}", self.trunc_prompt_path));
-        Ok(Some(output))
-      }
-      "edit_mode" => {
-        let mut output =
-          String::from("The style of editor shortcuts used in the line-editing of the prompt\n");
-        output.push_str(&format!("{}", self.edit_mode));
-        Ok(Some(output))
-      }
-      "comp_limit" => {
-        let mut output =
-          String::from("Maximum number of completion candidates displayed upon pressing tab\n");
-        output.push_str(&format!("{}", self.comp_limit));
-        Ok(Some(output))
-      }
-      "highlight" => {
-        let mut output =
-          String::from("Whether to enable or disable syntax highlighting on the prompt\n");
-        output.push_str(&format!("{}", self.highlight));
-        Ok(Some(output))
-      }
-      "auto_indent" => {
-        let mut output =
-          String::from("Whether to automatically indent new lines in multiline commands\n");
-        output.push_str(&format!("{}", self.auto_indent));
-        Ok(Some(output))
-      }
-      "linebreak_on_incomplete" => {
-        let mut output =
-          String::from("Whether to automatically insert a newline when the input is incomplete\n");
-        output.push_str(&format!("{}", self.linebreak_on_incomplete));
-        Ok(Some(output))
-      }
-      "leader" => {
-        let mut output = String::from("The leader key sequence used in keymap bindings\n");
-        output.push_str(&self.leader);
-        Ok(Some(output))
-      }
-      "line_numbers" => {
-        let mut output = String::from("Whether to display line numbers in multiline input\n");
-        output.push_str(&format!("{}", self.line_numbers));
-        Ok(Some(output))
-      }
-      _ => Err(ShErr::simple(
-        ShErrKind::SyntaxErr,
-        format!("shopt: Unexpected 'prompt' option '{query}'"),
-      )),
-    }
-  }
-}
 
-impl Display for ShOptPrompt {
+    /// Command to execute as a screensaver after idle timeout
-  fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+    screensaver_cmd: String = String::new(),
-    let mut output = vec![];
 
-    output.push(format!("trunc_prompt_path = {}", self.trunc_prompt_path));
+    /// Idle time in seconds before running screensaver_cmd (0 = disabled)
-    output.push(format!("edit_mode = {}", self.edit_mode));
+    screensaver_idle_time: usize = 0,
-    output.push(format!("comp_limit = {}", self.comp_limit));
-    output.push(format!("highlight = {}", self.highlight));
-    output.push(format!("auto_indent = {}", self.auto_indent));
-    output.push(format!(
-      "linebreak_on_incomplete = {}",
-      self.linebreak_on_incomplete
-    ));
-    output.push(format!("leader = {}", self.leader));
-    output.push(format!("line_numbers = {}", self.line_numbers));
 
-    let final_output = output.join("\n");
+    /// Whether tab completion matching is case-insensitive
-
+    completion_ignore_case: bool = false,
-    writeln!(f, "{final_output}")
-  }
-}
-
-impl Default for ShOptPrompt {
-  fn default() -> Self {
-    ShOptPrompt {
-      trunc_prompt_path: 4,
-      edit_mode: ShedEditMode::Vi,
-      comp_limit: 100,
-      highlight: true,
-      auto_indent: true,
-      linebreak_on_incomplete: true,
-      leader: "\\".to_string(),
-      line_numbers: true,
-    }
   }
 }
 
@@ -548,9 +323,16 @@ mod tests {
   #[test]
   fn all_core_fields_covered() {
     let ShOptCore {
-          dotglob, autocd, hist_ignore_dupes, max_hist,
+      dotglob,
-          interactive_comments, auto_hist, bell_enabled, max_recurse_depth,
+      autocd,
+      hist_ignore_dupes,
+      max_hist,
+      interactive_comments,
+      auto_hist,
+      bell_enabled,
+      max_recurse_depth,
       xpg_echo,
+      noclobber,
     } = ShOptCore::default();
     // If a field is added to the struct, this destructure fails to compile.
     let _ = (
@@ -563,6 +345,7 @@ mod tests {
       bell_enabled,
       max_recurse_depth,
       xpg_echo,
+      noclobber,
     );
   }
 
@@ -596,12 +379,6 @@ mod tests {
   fn set_and_get_prompt_opts() {
     let mut opts = ShOpts::default();
 
-    opts.set("prompt.edit_mode", "emacs").unwrap();
-    assert!(matches!(opts.prompt.edit_mode, ShedEditMode::Emacs));
-
-    opts.set("prompt.edit_mode", "vi").unwrap();
-    assert!(matches!(opts.prompt.edit_mode, ShedEditMode::Vi));
-
     opts.set("prompt.comp_limit", "50").unwrap();
     assert_eq!(opts.prompt.comp_limit, 50);
 
@@ -646,7 +423,6 @@ mod tests {
     assert!(opts.set("core.dotglob", "notabool").is_err());
     assert!(opts.set("core.max_hist", "notanint").is_err());
     assert!(opts.set("core.max_recurse_depth", "-5").is_err());
-    assert!(opts.set("prompt.edit_mode", "notepad").is_err());
     assert!(opts.set("prompt.comp_limit", "abc").is_err());
   }
 
@@ -660,7 +436,6 @@ mod tests {
     assert!(core_output.contains("bell_enabled"));
 
     let prompt_output = opts.get("prompt").unwrap().unwrap();
-    assert!(prompt_output.contains("edit_mode"));
     assert!(prompt_output.contains("comp_limit"));
     assert!(prompt_output.contains("highlight"));
   }

src/signal.rs

@@ -1,31 +1,45 @@
-use std::sync::atomic::{AtomicBool, AtomicI32, AtomicU64, Ordering};
+use std::{
+  collections::VecDeque,
+  sync::atomic::{AtomicBool, AtomicI32, AtomicU64, Ordering},
+};
 
-use nix::sys::signal::{SaFlags, SigAction, sigaction};
+use nix::{
+  sys::signal::{SaFlags, SigAction, sigaction},
+  unistd::getpid,
+};
 
 use crate::{
   builtin::trap::TrapTarget,
-  jobs::{JobCmdFlags, JobID, take_term},
+  jobs::{Job, JobCmdFlags, JobID, take_term},
   libsh::error::{ShErr, ShErrKind, ShResult},
   parse::execute::exec_input,
   prelude::*,
-  state::{AutoCmd, AutoCmdKind, read_jobs, read_logic, write_jobs, write_meta},
+  state::{
+    AutoCmd, AutoCmdKind, VarFlags, VarKind, read_jobs, read_logic, write_jobs, write_meta,
+    write_vars,
+  },
 };
 
 static SIGNALS: AtomicU64 = AtomicU64::new(0);
 
 pub static REAPING_ENABLED: AtomicBool = AtomicBool::new(true);
 pub static SHOULD_QUIT: AtomicBool = AtomicBool::new(false);
-pub static GOT_SIGWINCH: AtomicBool = AtomicBool::new(false);
 pub static JOB_DONE: AtomicBool = AtomicBool::new(false);
 pub static QUIT_CODE: AtomicI32 = AtomicI32::new(0);
 
-const MISC_SIGNALS: [Signal; 22] = [
+/// Window size change signal
+pub static GOT_SIGWINCH: AtomicBool = AtomicBool::new(false);
+
+/// SIGUSR1 tells the prompt that it needs to fully refresh.
+/// Useful for dynamic prompt content and asynchronous refreshing
+pub static GOT_SIGUSR1: AtomicBool = AtomicBool::new(false);
+
+const MISC_SIGNALS: [Signal; 21] = [
   Signal::SIGILL,
   Signal::SIGTRAP,
   Signal::SIGABRT,
   Signal::SIGBUS,
   Signal::SIGFPE,
-  Signal::SIGUSR1,
   Signal::SIGSEGV,
   Signal::SIGUSR2,
   Signal::SIGPIPE,
@@ -65,7 +79,7 @@ pub fn check_signals() -> ShResult<()> {
   if got_signal(Signal::SIGINT) {
     interrupt()?;
     run_trap(Signal::SIGINT)?;
-    return Err(ShErr::simple(ShErrKind::ClearReadline, ""));
+    return Err(ShErr::simple(ShErrKind::Interrupt, ""));
   }
   if got_signal(Signal::SIGHUP) {
     run_trap(Signal::SIGHUP)?;
@@ -87,6 +101,10 @@ pub fn check_signals() -> ShResult<()> {
     GOT_SIGWINCH.store(true, Ordering::SeqCst);
     run_trap(Signal::SIGWINCH)?;
   }
+  if got_signal(Signal::SIGUSR1) {
+    GOT_SIGUSR1.store(true, Ordering::SeqCst);
+    run_trap(Signal::SIGUSR1)?;
+  }
 
   for sig in MISC_SIGNALS {
     if got_signal(sig) {
@@ -316,6 +334,25 @@ pub fn child_exited(pid: Pid, status: WtStat) -> ShResult<()> {
       let result = read_jobs(|j| j.query(JobID::Pgid(pgid)).cloned());
       if let Some(job) = result {
         let job_complete_msg = job.display(&job_order, JobCmdFlags::PIDS).to_string();
+        let statuses = job.get_stats();
+
+        for status in &statuses {
+          if let WtStat::Signaled(_, sig, _) = status
+            && *sig == Signal::SIGINT
+          {
+            // Necessary to interrupt stuff like shell loops
+            kill(getpid(), Signal::SIGINT).ok();
+          }
+        }
+
+        if let Some(pipe_status) = Job::pipe_status(&statuses) {
+          let pipe_status = pipe_status
+            .into_iter()
+            .map(|s| s.to_string())
+            .collect::<VecDeque<String>>();
+
+          write_vars(|v| v.set_var("PIPESTATUS", VarKind::Arr(pipe_status), VarFlags::NONE))?;
+        }
 
         let post_job_hooks = read_logic(|l| l.get_autocmds(AutoCmdKind::OnJobFinish));
         for cmd in post_job_hooks {

src/state.rs

@@ -1,8 +1,14 @@
 use std::{
-  cell::RefCell, collections::{HashMap, HashSet, VecDeque, hash_map::Entry}, fmt::Display, ops::{BitAnd, BitAndAssign, BitOr, BitOrAssign}, os::unix::fs::PermissionsExt, str::FromStr, time::Duration
+  cell::RefCell,
+  collections::{HashMap, HashSet, VecDeque, hash_map::Entry},
+  fmt::Display,
+  ops::{BitAnd, BitAndAssign, BitOr, BitOrAssign},
+  os::unix::fs::PermissionsExt,
+  str::FromStr,
+  time::Duration,
 };
 
-use nix::unistd::{User, gethostname, getppid};
+use nix::unistd::{User, gethostname, getppid, getuid};
 use regex::Regex;
 
 use crate::{
@@ -25,7 +31,7 @@ use crate::{
   },
   prelude::*,
   readline::{
-    complete::{BashCompSpec, CompSpec},
+    complete::{BashCompSpec, Candidate, CompSpec},
     keys::KeyEvent,
     markers,
   },
@@ -36,7 +42,7 @@ thread_local! {
   pub static SHED: Shed = Shed::new();
 }
 
-#[derive(Clone,Debug)]
+#[derive(Clone, Debug)]
 pub struct Shed {
   pub jobs: RefCell<JobTab>,
   pub var_scopes: RefCell<ScopeStack>,
@@ -315,6 +321,34 @@ impl ScopeStack {
     };
     scope.set_var(var_name, val, flags)
   }
+  pub fn get_magic_var(&self, var_name: &str) -> Option<String> {
+    match var_name {
+      "SECONDS" => {
+        let shell_time = read_meta(|m| m.shell_time());
+        let secs = Instant::now().duration_since(shell_time).as_secs();
+        Some(secs.to_string())
+      }
+      "EPOCHREALTIME" => {
+        let epoch = std::time::SystemTime::now()
+          .duration_since(std::time::UNIX_EPOCH)
+          .unwrap_or(Duration::from_secs(0))
+          .as_secs_f64();
+        Some(epoch.to_string())
+      }
+      "EPOCHSECONDS" => {
+        let epoch = std::time::SystemTime::now()
+          .duration_since(std::time::UNIX_EPOCH)
+          .unwrap_or(Duration::from_secs(0))
+          .as_secs();
+        Some(epoch.to_string())
+      }
+      "RANDOM" => {
+        let random = rand::random_range(0..32768);
+        Some(random.to_string())
+      }
+      _ => None,
+    }
+  }
   pub fn get_arr_elems(&self, var_name: &str) -> ShResult<Vec<String>> {
     for scope in self.scopes.iter().rev() {
       if scope.var_exists(var_name)
@@ -440,7 +474,9 @@ impl ScopeStack {
   pub fn try_get_var(&self, var_name: &str) -> Option<String> {
     // This version of get_var() is mainly used internally
     // so that we have access to Option methods
-    if let Ok(param) = var_name.parse::<ShellParam>() {
+    if let Some(magic) = self.get_magic_var(var_name) {
+      return Some(magic);
+    } else if let Ok(param) = var_name.parse::<ShellParam>() {
       let val = self.get_param(param);
       if !val.is_empty() {
         return Some(val);
@@ -463,6 +499,9 @@ impl ScopeStack {
     var
   }
   pub fn get_var(&self, var_name: &str) -> String {
+    if let Some(magic) = self.get_magic_var(var_name) {
+      return magic;
+    }
     if let Ok(param) = var_name.parse::<ShellParam>() {
       return self.get_param(param);
     }
@@ -495,7 +534,10 @@ impl ScopeStack {
       return val.clone();
     }
     // Positional params are scope-local; only check the current scope
-    if matches!(param, ShellParam::Pos(_) | ShellParam::AllArgs | ShellParam::AllArgsStr | ShellParam::ArgCount) {
+    if matches!(
+      param,
+      ShellParam::Pos(_) | ShellParam::AllArgs | ShellParam::AllArgsStr | ShellParam::ArgCount
+    ) {
       if let Some(scope) = self.scopes.last() {
         return scope.get_param(param);
       }
@@ -589,59 +631,31 @@ pub enum AutoCmdKind {
   OnCompletionStart,
   OnCompletionCancel,
   OnCompletionSelect,
+	OnScreensaverExec,
+	OnScreensaverReturn,
   OnExit,
 }
 
-impl Display for AutoCmdKind {
+crate::two_way_display!(AutoCmdKind,
-  fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+	PreCmd              <=> "pre-cmd";
-    match self {
+	PostCmd             <=> "post-cmd";
-      Self::PreCmd => write!(f, "pre-cmd"),
+	PreChangeDir        <=> "pre-change-dir";
-      Self::PostCmd => write!(f, "post-cmd"),
+	PostChangeDir       <=> "post-change-dir";
-      Self::PreChangeDir => write!(f, "pre-change-dir"),
+	OnJobFinish         <=> "on-job-finish";
-      Self::PostChangeDir => write!(f, "post-change-dir"),
+	PrePrompt           <=> "pre-prompt";
-      Self::OnJobFinish => write!(f, "on-job-finish"),
+	PostPrompt          <=> "post-prompt";
-      Self::PrePrompt => write!(f, "pre-prompt"),
+	PreModeChange       <=> "pre-mode-change";
-      Self::PostPrompt => write!(f, "post-prompt"),
+	PostModeChange      <=> "post-mode-change";
-      Self::PreModeChange => write!(f, "pre-mode-change"),
+	OnHistoryOpen       <=> "on-history-open";
-      Self::PostModeChange => write!(f, "post-mode-change"),
+	OnHistoryClose      <=> "on-history-close";
-      Self::OnHistoryOpen => write!(f, "on-history-open"),
+	OnHistorySelect     <=> "on-history-select";
-      Self::OnHistoryClose => write!(f, "on-history-close"),
+	OnCompletionStart   <=> "on-completion-start";
-      Self::OnHistorySelect => write!(f, "on-history-select"),
+	OnCompletionCancel  <=> "on-completion-cancel";
-      Self::OnCompletionStart => write!(f, "on-completion-start"),
+	OnCompletionSelect  <=> "on-completion-select";
-      Self::OnCompletionCancel => write!(f, "on-completion-cancel"),
+	OnScreensaverExec   <=> "on-screensaver-exec";
-      Self::OnCompletionSelect => write!(f, "on-completion-select"),
+	OnScreensaverReturn <=> "on-screensaver-return";
-      Self::OnExit => write!(f, "on-exit"),
+	OnExit              <=> "on-exit";
-    }
+);
-  }
-}
-
-impl FromStr for AutoCmdKind {
-  type Err = ShErr;
-  fn from_str(s: &str) -> Result<Self, Self::Err> {
-    match s {
-      "pre-cmd" => Ok(Self::PreCmd),
-      "post-cmd" => Ok(Self::PostCmd),
-      "pre-change-dir" => Ok(Self::PreChangeDir),
-      "post-change-dir" => Ok(Self::PostChangeDir),
-      "on-job-finish" => Ok(Self::OnJobFinish),
-      "pre-prompt" => Ok(Self::PrePrompt),
-      "post-prompt" => Ok(Self::PostPrompt),
-      "pre-mode-change" => Ok(Self::PreModeChange),
-      "post-mode-change" => Ok(Self::PostModeChange),
-      "on-history-open" => Ok(Self::OnHistoryOpen),
-      "on-history-close" => Ok(Self::OnHistoryClose),
-      "on-history-select" => Ok(Self::OnHistorySelect),
-      "on-completion-start" => Ok(Self::OnCompletionStart),
-      "on-completion-cancel" => Ok(Self::OnCompletionCancel),
-      "on-completion-select" => Ok(Self::OnCompletionSelect),
-      "on-exit" => Ok(Self::OnExit),
-      _ => Err(ShErr::simple(
-        ShErrKind::ParseErr,
-        format!("Invalid autocmd kind: {}", s),
-      )),
-    }
-  }
-}
 
 #[derive(Clone, Debug)]
 pub struct AutoCmd {
@@ -959,6 +973,13 @@ impl From<Vec<String>> for Var {
   }
 }
 
+impl From<Vec<Candidate>> for Var {
+  fn from(value: Vec<Candidate>) -> Self {
+    let as_strs = value.into_iter().map(|c| c.0).collect::<Vec<_>>();
+    Self::new(VarKind::Arr(as_strs.into()), VarFlags::NONE)
+  }
+}
+
 impl From<&[String]> for Var {
   fn from(value: &[String]) -> Self {
     let mut new = VecDeque::new();
@@ -978,19 +999,7 @@ macro_rules! impl_var_from {
 }
 
 impl_var_from!(
-	i8,
+  i8, i16, i32, i64, isize, u8, u16, u32, u64, usize, String, &str, bool
-	i16,
-	i32,
-	i64,
-	isize,
-	u8,
-	u16,
-	u32,
-	u64,
-	usize,
-	String,
-	&str,
-	bool
 );
 
 #[derive(Default, Clone, Debug)]
@@ -1012,7 +1021,7 @@ impl VarTab {
     }
   }
   pub fn new() -> Self {
-    let vars = HashMap::new();
+    let vars = Self::init_sh_vars();
     let params = Self::init_params();
     Self::init_env();
     let mut var_tab = Self {
@@ -1031,6 +1040,11 @@ impl VarTab {
     params.insert(ShellParam::LastJob, "".into()); // PID of the last background job (if any)
     params
   }
+  fn init_sh_vars() -> HashMap<String, Var> {
+    let mut vars = HashMap::new();
+    vars.insert("COMP_WORDBREAKS".into(), " \t\n\"'@><=;|&(".into());
+    vars
+  }
   fn init_env() {
     let pathbuf_to_string =
       |pb: Result<PathBuf, std::io::Error>| pb.unwrap_or_default().to_string_lossy().to_string();
@@ -1063,6 +1077,8 @@ impl VarTab {
       .map(|hname| hname.to_string_lossy().to_string())
       .unwrap_or_default();
 
+    let help_paths = format!("/usr/share/shed/doc:{home}/.local/share/shed/doc");
+
     unsafe {
       env::set_var("IFS", " \t\n");
       env::set_var("HOST", hostname.clone());
@@ -1079,6 +1095,7 @@ impl VarTab {
       env::set_var("SHELL", pathbuf_to_string(std::env::current_exe()));
       env::set_var("SHED_HIST", format!("{}/.shedhist", home));
       env::set_var("SHED_RC", format!("{}/.shedrc", home));
+      env::set_var("SHED_HPATH", help_paths);
     }
   }
   pub fn init_sh_argv(&mut self) {
@@ -1295,6 +1312,15 @@ impl VarTab {
         .get(&ShellParam::Status)
         .map(|s| s.to_string())
         .unwrap_or("0".into()),
+      ShellParam::AllArgsStr => {
+        let ifs = get_separator();
+        self
+          .params
+          .get(&ShellParam::AllArgs)
+          .map(|s| s.replace(markers::ARG_SEP, &ifs).to_string())
+          .unwrap_or_default()
+      }
+
       _ => self
         .params
         .get(&param)
@@ -1305,14 +1331,22 @@ impl VarTab {
 }
 
 /// A table of metadata for the shell
-#[derive(Clone, Default, Debug)]
+#[derive(Clone, Debug)]
 pub struct MetaTab {
+  // Time when the shell was started, used for calculating shell uptime
+  shell_time: Instant,
+
   // command running duration
   runtime_start: Option<Instant>,
   runtime_stop: Option<Instant>,
 
   // pending system messages
-  system_msg: Vec<String>,
+	// are drawn above the prompt and survive redraws
+  system_msg: VecDeque<String>,
+
+	// same as system messages,
+	// but they appear under the prompt and are erased on redraw
+	status_msg: VecDeque<String>,
 
   // pushd/popd stack
   dir_stack: VecDeque<PathBuf>,
@@ -1331,6 +1365,26 @@ pub struct MetaTab {
   pending_widget_keys: Vec<KeyEvent>,
 }
 
+impl Default for MetaTab {
+  fn default() -> Self {
+    Self {
+      shell_time: Instant::now(),
+      runtime_start: None,
+      runtime_stop: None,
+      system_msg: VecDeque::new(),
+			status_msg: VecDeque::new(),
+      dir_stack: VecDeque::new(),
+      getopts_offset: 0,
+      old_path: None,
+      old_pwd: None,
+      path_cache: HashSet::new(),
+      cwd_cache: HashSet::new(),
+      comp_specs: HashMap::new(),
+      pending_widget_keys: vec![],
+    }
+  }
+}
+
 impl MetaTab {
   pub fn new() -> Self {
     Self {
@@ -1338,6 +1392,9 @@ impl MetaTab {
       ..Default::default()
     }
   }
+  pub fn shell_time(&self) -> Instant {
+    self.shell_time
+  }
   pub fn set_pending_widget_keys(&mut self, keys: &str) {
     let exp = expand_keymap(keys);
     self.pending_widget_keys = exp;
@@ -1535,14 +1592,23 @@ impl MetaTab {
     }
   }
   pub fn post_system_message(&mut self, message: String) {
-    self.system_msg.push(message);
+    self.system_msg.push_back(message);
   }
   pub fn pop_system_message(&mut self) -> Option<String> {
-    self.system_msg.pop()
+    self.system_msg.pop_front()
   }
   pub fn system_msg_pending(&self) -> bool {
     !self.system_msg.is_empty()
   }
+	pub fn post_status_message(&mut self, message: String) {
+		self.status_msg.push_back(message);
+	}
+	pub fn pop_status_message(&mut self) -> Option<String> {
+		self.status_msg.pop_front()
+	}
+	pub fn status_msg_pending(&self) -> bool {
+		!self.status_msg.is_empty()
+	}
   pub fn dir_stack_top(&self) -> Option<&PathBuf> {
     self.dir_stack.front()
   }
@@ -1782,6 +1848,15 @@ pub fn change_dir<P: AsRef<Path>>(dir: P) -> ShResult<()> {
   Ok(())
 }
 
+pub fn get_separator() -> String {
+  env::var("IFS")
+    .unwrap_or(String::from(" "))
+    .chars()
+    .next()
+    .unwrap()
+    .to_string()
+}
+
 pub fn get_status() -> i32 {
   read_vars(|v| v.get_param(ShellParam::Status))
     .parse::<i32>()
@@ -1791,19 +1866,44 @@ pub fn set_status(code: i32) {
   write_vars(|v| v.set_param(ShellParam::Status, &code.to_string()))
 }
 
-pub fn source_rc() -> ShResult<()> {
+pub fn source_runtime_file(name: &str, env_var_name: Option<&str>) -> ShResult<()> {
-  let path = if let Ok(path) = env::var("SHED_RC") {
+  let etc_path = PathBuf::from(format!("/etc/shed/{name}"));
+  if etc_path.is_file()
+    && let Err(e) = source_file(etc_path)
+  {
+    e.print_error();
+  }
+
+  let path = if let Some(name) = env_var_name
+    && let Ok(path) = env::var(name)
+  {
     PathBuf::from(&path)
+  } else if let Some(home) = get_home() {
+    home.join(format!(".{name}"))
   } else {
-    let home = env::var("HOME").unwrap();
+    return Err(ShErr::simple(
-    PathBuf::from(format!("{home}/.shedrc"))
+      ShErrKind::InternalErr,
+      "could not determine home path",
+    ));
   };
-  if !path.exists() {
+  if !path.is_file() {
-    return Err(ShErr::simple(ShErrKind::InternalErr, ".shedrc not found"));
+    return Ok(());
   }
   source_file(path)
 }
 
+pub fn source_rc() -> ShResult<()> {
+  source_runtime_file("shedrc", Some("SHED_RC"))
+}
+
+pub fn source_login() -> ShResult<()> {
+  source_runtime_file("shed_profile", Some("SHED_PROFILE"))
+}
+
+pub fn source_env() -> ShResult<()> {
+  source_runtime_file("shedenv", Some("SHED_ENV"))
+}
+
 pub fn source_file(path: PathBuf) -> ShResult<()> {
   let source_name = path.to_string_lossy().to_string();
   let mut file = OpenOptions::new().read(true).open(path)?;
@@ -1813,3 +1913,42 @@ pub fn source_file(path: PathBuf) -> ShResult<()> {
   exec_input(buf, None, false, Some(source_name))?;
   Ok(())
 }
+
+#[track_caller]
+pub fn get_home_unchecked() -> PathBuf {
+  if let Some(home) = get_home() {
+    home
+  } else {
+    let caller = std::panic::Location::caller();
+    panic!(
+      "get_home_unchecked: could not determine home directory (called from {}:{})",
+      caller.file(),
+      caller.line()
+    )
+  }
+}
+
+#[track_caller]
+pub fn get_home_str_unchecked() -> String {
+  if let Some(home) = get_home() {
+    home.to_string_lossy().to_string()
+  } else {
+    let caller = std::panic::Location::caller();
+    panic!(
+      "get_home_str_unchecked: could not determine home directory (called from {}:{})",
+      caller.file(),
+      caller.line()
+    )
+  }
+}
+
+pub fn get_home() -> Option<PathBuf> {
+  env::var("HOME")
+    .ok()
+    .map(PathBuf::from)
+    .or_else(|| User::from_uid(getuid()).ok().flatten().map(|u| u.dir))
+}
+
+pub fn get_home_str() -> Option<String> {
+  get_home().map(|h| h.to_string_lossy().to_string())
+}

src/testutil.rs

@@ -1,9 +1,9 @@
 use std::{
-	collections::HashMap,
+  collections::{HashMap, HashSet},
   env,
-	os::fd::{AsRawFd, OwnedFd},
+  os::fd::{AsRawFd, BorrowedFd, OwnedFd},
   path::PathBuf,
-	sync::{self, MutexGuard},
+  sync::{self, Arc, MutexGuard},
 };
 
 use nix::{
@@ -14,10 +14,12 @@ use nix::{
 };
 
 use crate::{
+  expand::expand_aliases,
   libsh::error::ShResult,
-	parse::{Redir, RedirType, execute::exec_input},
+  parse::{ParsedSrc, Redir, RedirType, execute::exec_input, lex::LexFlags},
   procio::{IoFrame, IoMode, RedirGuard},
-	state::{MetaTab, SHED},
+  readline::register::{restore_registers, save_registers},
+  state::{MetaTab, SHED, read_logic},
 };
 
 static TEST_MUTEX: sync::Mutex<()> = sync::Mutex::new(());
@@ -41,9 +43,9 @@ pub struct TestGuard {
   old_cwd: PathBuf,
   saved_env: HashMap<String, String>,
   pty_master: OwnedFd,
-	_pty_slave: OwnedFd,
+  pty_slave: OwnedFd,
 
-	cleanups: Vec<Box<dyn FnOnce()>>
+  cleanups: Vec<Box<dyn FnOnce()>>,
 }
 
 impl TestGuard {
@@ -51,56 +53,55 @@ impl TestGuard {
     let _lock = TEST_MUTEX.lock().unwrap();
 
     let pty = openpty(None, None).unwrap();
-		let (pty_master,pty_slave) = (pty.master, pty.slave);
+    let (pty_master, pty_slave) = (pty.master, pty.slave);
     let mut attrs = tcgetattr(&pty_slave).unwrap();
     attrs.output_flags &= !OutputFlags::ONLCR;
     tcsetattr(&pty_slave, SetArg::TCSANOW, &attrs).unwrap();
 
     let mut frame = IoFrame::new();
-		frame.push(
+    frame.push(Redir::new(
-			Redir::new(
       IoMode::Fd {
         tgt_fd: 0,
         src_fd: pty_slave.as_raw_fd(),
       },
       RedirType::Input,
-			),
+    ));
-		);
+    frame.push(Redir::new(
-		frame.push(
-			Redir::new(
       IoMode::Fd {
         tgt_fd: 1,
         src_fd: pty_slave.as_raw_fd(),
       },
       RedirType::Output,
-			),
+    ));
-		);
+    frame.push(Redir::new(
-		frame.push(
-			Redir::new(
       IoMode::Fd {
         tgt_fd: 2,
         src_fd: pty_slave.as_raw_fd(),
       },
       RedirType::Output,
-			),
+    ));
-		);
 
     let _redir_guard = frame.redirect().unwrap();
 
     let old_cwd = env::current_dir().unwrap();
     let saved_env = env::vars().collect();
     SHED.with(|s| s.save());
+    save_registers();
     Self {
       _lock,
       _redir_guard,
       old_cwd,
       saved_env,
       pty_master,
-			_pty_slave: pty_slave,
+      pty_slave,
       cleanups: vec![],
     }
   }
 
+  pub fn pty_slave(&self) -> BorrowedFd<'_> {
+    unsafe { BorrowedFd::borrow_raw(self.pty_slave.as_raw_fd()) }
+  }
+
   pub fn add_cleanup(&mut self, f: impl FnOnce() + 'static) {
     self.cleanups.push(Box::new(f));
   }
@@ -111,10 +112,11 @@ impl TestGuard {
     fcntl(
       self.pty_master.as_raw_fd(),
       FcntlArg::F_SETFL(flags | OFlag::O_NONBLOCK),
-		).unwrap();
+    )
+    .unwrap();
 
     let mut out = vec![];
-		let mut buf = [0;4096];
+    let mut buf = [0; 4096];
     loop {
       match read(self.pty_master.as_raw_fd(), &mut buf) {
         Ok(0) => break,
@@ -123,10 +125,7 @@ impl TestGuard {
       }
     }
 
-		fcntl(
+    fcntl(self.pty_master.as_raw_fd(), FcntlArg::F_SETFL(flags)).unwrap();
-			self.pty_master.as_raw_fd(),
-			FcntlArg::F_SETFL(flags),
-		).unwrap();
 
     String::from_utf8_lossy(&out).to_string()
   }
@@ -142,14 +141,133 @@ impl Drop for TestGuard {
   fn drop(&mut self) {
     env::set_current_dir(&self.old_cwd).ok();
     for (k, _) in env::vars() {
-			unsafe { env::remove_var(&k); }
+      unsafe {
+        env::remove_var(&k);
+      }
     }
     for (k, v) in &self.saved_env {
-			unsafe { env::set_var(k, v); }
+      unsafe {
+        env::set_var(k, v);
+      }
     }
     for cleanup in self.cleanups.drain(..).rev() {
       cleanup();
     }
     SHED.with(|s| s.restore());
+    restore_registers();
+  }
+}
+
+pub fn get_ast(input: &str) -> ShResult<Vec<crate::parse::Node>> {
+  let log_tab = read_logic(|l| l.clone());
+  let input = expand_aliases(input.into(), HashSet::new(), &log_tab);
+
+  let source_name = "test_input".to_string();
+  let mut parser = ParsedSrc::new(Arc::new(input))
+    .with_lex_flags(LexFlags::empty())
+    .with_name(source_name.clone());
+
+  parser
+    .parse_src()
+    .map_err(|e| e.into_iter().next().unwrap())?;
+
+  Ok(parser.extract_nodes())
+}
+
+impl crate::parse::Node {
+  pub fn assert_structure(
+    &mut self,
+    expected: &mut impl Iterator<Item = NdKind>,
+  ) -> Result<(), String> {
+    let mut full_structure = vec![];
+    let mut before = vec![];
+    let mut after = vec![];
+    let mut offender = None;
+
+    self.walk_tree(&mut |s| {
+      let expected_rule = expected.next();
+      full_structure.push(s.class.as_nd_kind());
+
+      if offender.is_none()
+        && expected_rule
+          .as_ref()
+          .is_none_or(|e| *e != s.class.as_nd_kind())
+      {
+        offender = Some((s.class.as_nd_kind(), expected_rule));
+      } else if offender.is_none() {
+        before.push(s.class.as_nd_kind());
+      } else {
+        after.push(s.class.as_nd_kind());
+      }
+    });
+
+    assert!(
+      expected.next().is_none(),
+      "Expected structure has more nodes than actual structure"
+    );
+
+    if let Some((nd_kind, expected_rule)) = offender {
+      let expected_rule = expected_rule.map_or("(none — expected array too short)".into(), |e| {
+        format!("{e:?}")
+      });
+      let full_structure_hint = full_structure
+        .into_iter()
+        .map(|s| format!("\tNdKind::{s:?},"))
+        .collect::<Vec<String>>()
+        .join("\n");
+      let full_structure_hint =
+        format!("let expected = &mut [\n{full_structure_hint}\n].into_iter();");
+
+      let output = [
+        "Structure assertion failed!\n".into(),
+        format!(
+          "Expected node type '{:?}', found '{:?}'",
+          expected_rule, nd_kind
+        ),
+        format!("Before offender: {:?}", before),
+        format!("After offender: {:?}\n", after),
+        format!("hint: here is the full structure as an array\n {full_structure_hint}"),
+      ]
+      .join("\n");
+
+      Err(output)
+    } else {
+      Ok(())
+    }
+  }
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub enum NdKind {
+  IfNode,
+  LoopNode,
+  ForNode,
+  CaseNode,
+  Command,
+  Pipeline,
+  Conjunction,
+  Assignment,
+  BraceGrp,
+  Negate,
+  Test,
+  FuncDef,
+}
+
+impl crate::parse::NdRule {
+  pub fn as_nd_kind(&self) -> NdKind {
+    match self {
+      Self::Negate { .. } => NdKind::Negate,
+      Self::IfNode { .. } => NdKind::IfNode,
+      Self::LoopNode { .. } => NdKind::LoopNode,
+      Self::ForNode { .. } => NdKind::ForNode,
+      Self::CaseNode { .. } => NdKind::CaseNode,
+      Self::Command { .. } => NdKind::Command,
+      Self::Pipeline { .. } => NdKind::Pipeline,
+      Self::Conjunction { .. } => NdKind::Conjunction,
+      Self::Assignment { .. } => NdKind::Assignment,
+      Self::BraceGrp { .. } => NdKind::BraceGrp,
+      Self::Test { .. } => NdKind::Test,
+      Self::FuncDef { .. } => NdKind::FuncDef,
+    }
   }
 }

tests/gen_vi_tests.lua

@@ -0,0 +1,319 @@
+-- Generate Rust vi_test! macro invocations using neovim as oracle
+-- Usage: nvim --headless --clean -l tests/gen_vi_tests.lua
+--
+-- Define test cases as { name, input_text, key_sequence }
+-- Key sequences use vim notation: <Esc>, <CR>, <C-w>, etc.
+-- The script executes each in a fresh buffer and captures the result.
+
+local tests = {
+	-- ===================== basic char motions =====================
+	{ "dw_basic",          "hello world",       "dw" },
+	{ "dw_middle",         "one two three",     "wdw" },
+	{ "dd_whole_line",     "hello world",       "dd" },
+	{ "x_single",          "hello",             "x" },
+	{ "x_middle",          "hello",             "llx" },
+	{ "X_backdelete",      "hello",             "llX" },
+	{ "h_motion",          "hello",             "$h" },
+	{ "l_motion",          "hello",             "l" },
+	{ "h_at_start",        "hello",             "h" },
+	{ "l_at_end",          "hello",             "$l" },
+
+	-- ===================== word motions (small) =====================
+	{ "w_forward",         "one two three",     "w" },
+	{ "b_backward",        "one two three",     "$b" },
+	{ "e_end",             "one two three",     "e" },
+	{ "ge_back_end",       "one two three",     "$ge" },
+	{ "w_punctuation",     "foo.bar baz",       "w" },
+	{ "e_punctuation",     "foo.bar baz",       "e" },
+	{ "b_punctuation",     "foo.bar baz",       "$b" },
+	{ "w_at_eol",          "hello",             "$w" },
+	{ "b_at_bol",          "hello",             "b" },
+
+	-- ===================== word motions (big) =====================
+	{ "W_forward",         "foo.bar baz",       "W" },
+	{ "B_backward",        "foo.bar baz",       "$B" },
+	{ "E_end",             "foo.bar baz",       "E" },
+	{ "gE_back_end",       "one two three",     "$gE" },
+	{ "W_skip_punct",      "one-two three",     "W" },
+	{ "B_skip_punct",      "one two-three",     "$B" },
+	{ "E_skip_punct",      "one-two three",     "E" },
+	{ "dW_big",            "foo.bar baz",       "dW" },
+	{ "cW_big",            "foo.bar baz",       "cWx<Esc>" },
+
+	-- ===================== line motions =====================
+	{ "zero_bol",          "  hello",           "$0" },
+	{ "caret_first_char",  "  hello",           "$^" },
+	{ "dollar_eol",        "hello world",       "$" },
+	{ "g_last_nonws",      "hello   ",          "g_" },
+	{ "g_no_trailing",     "hello",             "g_" },
+	{ "pipe_column",       "hello world",       "6|" },
+	{ "pipe_col1",         "hello world",       "1|" },
+	{ "I_insert_front",    "  hello",           "Iworld <Esc>" },
+	{ "A_append_end",      "hello",             "A world<Esc>" },
+
+	-- ===================== find motions =====================
+	{ "f_find",            "hello world",       "fo" },
+	{ "F_find_back",       "hello world",       "$Fo" },
+	{ "t_till",            "hello world",       "tw" },
+	{ "T_till_back",       "hello world",       "$To" },
+	{ "f_no_match",        "hello",             "fz" },
+	{ "semicolon_repeat",  "abcabc",            "fa;;" },
+	{ "comma_reverse",     "abcabc",            "fa;;," },
+	{ "df_semicolon",      "abcabc",            "fa;;dfa" },
+	{ "t_at_target",       "aab",               "lta" },
+
+	-- ===================== delete operations =====================
+	{ "D_to_end",          "hello world",       "wD" },
+	{ "d_dollar",          "hello world",       "wd$" },
+	{ "d0_to_start",       "hello world",       "$d0" },
+	{ "dw_multiple",       "one two three",     "d2w" },
+	{ "dt_char",           "hello world",       "dtw" },
+	{ "df_char",           "hello world",       "dfw" },
+	{ "dh_back",           "hello",             "lldh" },
+	{ "dl_forward",        "hello",             "dl" },
+	{ "dge_back_end",      "one two three",     "$dge" },
+	{ "dG_to_end",         "hello world",       "dG" },
+	{ "dgg_to_start",      "hello world",       "$dgg" },
+	{ "d_semicolon",       "abcabc",            "fad;" },
+
+	-- ===================== change operations =====================
+	{ "cw_basic",          "hello world",       "cwfoo<Esc>" },
+	{ "C_to_end",          "hello world",       "wCfoo<Esc>" },
+	{ "cc_whole",          "hello world",       "ccfoo<Esc>" },
+	{ "ct_char",           "hello world",       "ctwfoo<Esc>" },
+	{ "s_single",          "hello",             "sfoo<Esc>" },
+	{ "S_whole_line",      "hello world",       "Sfoo<Esc>" },
+	{ "cl_forward",        "hello",             "clX<Esc>" },
+	{ "ch_backward",       "hello",             "llchX<Esc>" },
+	{ "cb_word_back",      "hello world",       "$cbfoo<Esc>" },
+	{ "ce_word_end",       "hello world",       "cefoo<Esc>" },
+	{ "c0_to_start",       "hello world",       "wc0foo<Esc>" },
+
+	-- ===================== yank and paste =====================
+	{ "yw_p_basic",        "hello world",       "ywwP" },
+	{ "dw_p_paste",        "hello world",       "dwP" },
+	{ "dd_p_paste",        "hello world",       "ddp" },
+	{ "y_dollar_p",        "hello world",       "wy$P" },
+	{ "ye_p",              "hello world",       "yewP" },
+	{ "yy_p",              "hello world",       "yyp" },
+	{ "Y_p",               "hello world",       "Yp" },
+	{ "p_after_x",         "hello",             "xp" },
+	{ "P_before",          "hello",             "llxP" },
+	{ "paste_empty",       "hello",             "p" },
+
+	-- ===================== replace =====================
+	{ "r_replace",         "hello",             "ra" },
+	{ "r_middle",          "hello",             "llra" },
+	{ "r_at_end",          "hello",             "$ra" },
+	{ "r_space",           "hello",             "r " },
+	{ "r_with_count",      "hello",             "3rx" },
+
+	-- ===================== case operations =====================
+	{ "tilde_single",      "hello",             "~" },
+	{ "tilde_count",       "hello",             "3~" },
+	{ "tilde_at_end",      "HELLO",             "$~" },
+	{ "tilde_mixed",       "hElLo",             "5~" },
+	{ "gu_word",           "HELLO world",       "guw" },
+	{ "gU_word",           "hello WORLD",       "gUw" },
+	{ "gu_dollar",         "HELLO WORLD",       "gu$" },
+	{ "gU_dollar",         "hello world",       "gU$" },
+	{ "gu_0",              "HELLO WORLD",       "$gu0" },
+	{ "gU_0",              "hello world",       "$gU0" },
+	{ "gtilde_word",       "hello WORLD",       "g~w" },
+	{ "gtilde_dollar",     "hello WORLD",       "g~$" },
+
+	-- ===================== text objects: word =====================
+	{ "diw_inner",         "one two three",     "wdiw" },
+	{ "ciw_replace",       "hello world",       "ciwfoo<Esc>" },
+	{ "daw_around",        "one two three",     "wdaw" },
+	{ "yiw_p",             "hello world",       "yiwAp <Esc>p" },
+	{ "diW_big_inner",     "one-two three",     "diW" },
+	{ "daW_big_around",    "one two-three end", "wdaW" },
+	{ "ciW_big",           "one-two three",     "ciWx<Esc>" },
+
+	-- ===================== text objects: quotes =====================
+	{ "di_dquote",         'one "two" three',   'f"di"' },
+	{ "da_dquote",         'one "two" three',   'f"da"' },
+	{ "ci_dquote",         'one "two" three',   'f"ci"x<Esc>' },
+	{ "di_squote",         "one 'two' three",   "f'di'" },
+	{ "da_squote",         "one 'two' three",   "f'da'" },
+	{ "di_backtick",       "one `two` three",   "f`di`" },
+	{ "da_backtick",       "one `two` three",   "f`da`" },
+	{ "ci_dquote_empty",   'one "" three',      'f"ci"x<Esc>' },
+
+	-- ===================== text objects: delimiters =====================
+	{ "di_paren",          "one (two) three",   "f(di(" },
+	{ "da_paren",          "one (two) three",   "f(da(" },
+	{ "ci_paren",          "one (two) three",   "f(ci(x<Esc>" },
+	{ "di_brace",          "one {two} three",   "f{di{" },
+	{ "da_brace",          "one {two} three",   "f{da{" },
+	{ "di_bracket",        "one [two] three",   "f[di[" },
+	{ "da_bracket",        "one [two] three",   "f[da[" },
+	{ "di_angle",          "one <two> three",   "f<di<" },
+	{ "da_angle",          "one <two> three",   "f<da<" },
+	{ "di_paren_nested",   "fn(a, (b, c))",     "f(di(" },
+	{ "di_paren_empty",    "fn() end",          "f(di(" },
+	{ "dib_alias",         "one (two) three",   "f(dib" },
+	{ "diB_alias",         "one {two} three",   "f{diB" },
+
+	-- ===================== delimiter matching =====================
+	{ "percent_paren",     "(hello) world",     "%" },
+	{ "percent_brace",     "{hello} world",     "%" },
+	{ "percent_bracket",   "[hello] world",     "%" },
+	{ "percent_from_close", "(hello) world",    "f)%" },
+	{ "d_percent_paren",   "(hello) world",     "d%" },
+
+	-- ===================== insert mode entry =====================
+	{ "i_insert",          "hello",             "iX<Esc>" },
+	{ "a_append",          "hello",             "aX<Esc>" },
+	{ "I_front",           "  hello",           "IX<Esc>" },
+	{ "A_end",             "hello",             "AX<Esc>" },
+	{ "o_open_below",      "hello",             "oworld<Esc>" },
+	{ "O_open_above",      "hello",             "Oworld<Esc>" },
+
+	-- ===================== insert mode operations =====================
+	{ "empty_input",       "",                  "i hello<Esc>" },
+	{ "insert_escape",     "hello",             "aX<Esc>" },
+	{ "ctrl_w_del_word",   "hello world",       "A<C-w><Esc>" },
+	{ "ctrl_h_backspace",  "hello",             "A<C-h><Esc>" },
+
+	-- ===================== undo / redo =====================
+	{ "u_undo_delete",     "hello world",       "dwu" },
+	{ "u_undo_change",     "hello world",       "ciwfoo<Esc>u" },
+	{ "u_undo_x",          "hello",             "xu" },
+	{ "ctrl_r_redo",       "hello",             "xu<C-r>" },
+	{ "u_multiple",        "hello world",       "xdwu" },
+	{ "redo_after_undo",   "hello world",       "dwu<C-r>" },
+
+	-- ===================== dot repeat =====================
+	{ "dot_repeat_x",      "hello",             "x." },
+	{ "dot_repeat_dw",     "one two three",     "dw." },
+	{ "dot_repeat_cw",     "one two three",     "cwfoo<Esc>w." },
+	{ "dot_repeat_r",      "hello",             "ra.." },
+	{ "dot_repeat_s",      "hello",             "sX<Esc>l." },
+
+	-- ===================== counts =====================
+	{ "count_h",           "hello world",       "$3h" },
+	{ "count_l",           "hello world",       "3l" },
+	{ "count_w",           "one two three four", "2w" },
+	{ "count_b",           "one two three four", "$2b" },
+	{ "count_x",           "hello",             "3x" },
+	{ "count_dw",          "one two three four", "2dw" },
+	{ "verb_count_motion", "one two three four", "d2w" },
+	{ "count_s",           "hello",             "3sX<Esc>" },
+
+	-- ===================== indent / dedent =====================
+	{ "indent_line",       "hello",             ">>" },
+	{ "dedent_line",       "\thello",           "<<" },
+	{ "indent_double",     "hello",             ">>>>" },
+
+	-- ===================== join =====================
+	{ "J_join_lines",      "hello\nworld",      "J" },
+
+	-- ===================== case in visual =====================
+	{ "v_u_lower",         "HELLO",             "vlllu" },
+	{ "v_U_upper",         "hello",             "vlllU" },
+
+	-- ===================== visual mode =====================
+	{ "v_d_delete",        "hello world",       "vwwd" },
+	{ "v_x_delete",        "hello world",       "vwwx" },
+	{ "v_c_change",        "hello world",       "vwcfoo<Esc>" },
+	{ "v_y_p_yank",        "hello world",       "vwyAp <Esc>p" },
+	{ "v_dollar_d",        "hello world",       "wv$d" },
+	{ "v_0_d",             "hello world",       "$v0d" },
+	{ "ve_d",              "hello world",       "ved" },
+	{ "v_o_swap",          "hello world",       "vllod" },
+	{ "v_r_replace",       "hello",             "vlllrx" },
+	{ "v_tilde_case",      "hello",             "vlll~" },
+
+	-- ===================== visual line mode =====================
+	{ "V_d_delete",        "hello world",       "Vd" },
+	{ "V_y_p",             "hello world",       "Vyp" },
+	{ "V_S_change",        "hello world",       "VSfoo<Esc>" },
+
+	-- ===================== increment / decrement =====================
+	{ "ctrl_a_inc",        "num 5 end",         "w<C-a>" },
+	{ "ctrl_x_dec",        "num 5 end",         "w<C-x>" },
+	{ "ctrl_a_negative",   "num -3 end",        "w<C-a>" },
+	{ "ctrl_x_to_neg",     "num 0 end",         "w<C-x>" },
+	{ "ctrl_a_count",      "num 5 end",         "w3<C-a>" },
+
+	-- ===================== misc / edge cases =====================
+	{ "delete_empty",      "",                  "x" },
+	{ "undo_on_empty",     "",                  "u" },
+	{ "w_single_char",     "a b c",             "w" },
+	{ "dw_last_word",      "hello",             "dw" },
+	{ "dollar_single",     "h",                 "$" },
+	{ "caret_no_ws",       "hello",             "$^" },
+	{ "f_last_char",       "hello",             "fo" },
+	{ "r_on_space",        "hello world",       "5|r-" },
+}
+
+-- Map vim special key names to Rust string escape sequences
+local key_to_bytes = {
+	["<Esc>"]   = "\\x1b",
+	["<CR>"]    = "\\r",
+	["<BS>"]    = "\\x7f",
+	["<Tab>"]   = "\\t",
+	["<Del>"]   = "\\x1b[3~",
+	["<Up>"]    = "\\x1b[A",
+	["<Down>"]  = "\\x1b[B",
+	["<Right>"] = "\\x1b[C",
+	["<Left>"]  = "\\x1b[D",
+	["<Home>"]  = "\\x1b[H",
+	["<End>"]   = "\\x1b[F",
+}
+
+-- Convert vim key notation to Rust string escape sequences
+local function keys_to_rust(keys)
+	local result = keys
+	result = result:gsub("<C%-(.)>", function(ch)
+		local byte = string.byte(ch:lower()) - string.byte('a') + 1
+		return string.format("\\x%02x", byte)
+	end)
+	for name, bytes in pairs(key_to_bytes) do
+		result = result:gsub(vim.pesc(name), bytes)
+	end
+	return result
+end
+
+-- Escape a string for use in a Rust string literal
+local function rust_escape(s)
+	return s:gsub("\\", "\\\\"):gsub('"', '\\"'):gsub("\n", "\\n"):gsub("\t", "\\t")
+end
+
+io.write("vi_test! {\n")
+
+for i, test in ipairs(tests) do
+	local name, input, keys = test[1], test[2], test[3]
+
+	-- Fresh buffer and register state
+	local input_lines = vim.split(input, "\n", { plain = true })
+	vim.api.nvim_buf_set_lines(0, 0, -1, false, input_lines)
+	vim.api.nvim_win_set_cursor(0, { 1, 0 })
+	vim.fn.setreg('"', '')
+
+	-- Execute the key sequence synchronously
+	local translated = vim.api.nvim_replace_termcodes(keys, true, false, true)
+	vim.api.nvim_feedkeys(translated, "ntx", false)
+	vim.api.nvim_exec_autocmds("CursorMoved", {})
+
+	-- Capture result
+	local lines = vim.api.nvim_buf_get_lines(0, 0, -1, false)
+	local result = table.concat(lines, "\n")
+	local cursor_col = vim.api.nvim_win_get_cursor(0)[2]
+
+	local rust_keys = keys_to_rust(keys)
+	local rust_input = rust_escape(input)
+	local rust_result = rust_escape(result)
+
+	local sep = ";"
+	if i == #tests then sep = "" end
+
+	io.write(string.format('\tvi_%s: "%s" => "%s" => "%s", %d%s\n',
+		name, rust_input, rust_keys, rust_result, cursor_col, sep))
+end
+
+io.write("}\n")
+
+vim.cmd("qa!")