Fallback created for git commands not standard handled by this module

README.md

@@ -23,7 +23,23 @@ procedure and through direct procedures.
 ```
 
 `git` is an ordinary procedure. The first argument is the Git command symbol
-and the remaining arguments are passed to that command.
+and the remaining arguments are passed to that command. Registered commands use
+their git-cli wrapper and can provide structured Racket results or additional
+behavior. Any other command is passed directly to the installed Git executable
+and handled with git-cli's standard command result processing.
+
+For example, commands that do not have a dedicated wrapper can still be used:
+
+```racket
+(git 'blame "main.rkt")
+(git* clean -n)
+(git* worktree list)
+(git* archive --format=zip HEAD)
+```
+
+A successful fallback command returns `#t` after displaying normal Git output.
+A failing fallback command raises the same standard git-cli error as an ordinary
+pass-through wrapper.
 
 `git*` is the compact command-style syntax. Bare arguments are converted to
 strings, so `(git* remote get-url origin)` is equivalent to
@@ -69,12 +85,16 @@ credentials, SSH keys, pull strategy, and other repository configuration.
 
 ## Commands
 
-The package currently registers commands including `init`, `status`, `add`, `commit`,
-`push`, `pull`, `fetch`, `config`, `branch`, `remote`, `stash`, `restore`, `reset`, `revert`, `rebase`, `merge`, `cherry-pick`, `mergetool`, `switch`, `clone`, `tag`, `log`,
-`rev-list`, `diff`, `show`, `grep`, `help`, `version`, and `new-version`.
+The package registers wrappers for commands where git-cli adds useful behavior,
+including `init`, `status`, `add`, `commit`, `push`, `pull`, `fetch`, `config`,
+`branch`, `remote`, `stash`, `restore`, `reset`, `revert`, `rebase`, `merge`,
+`cherry-pick`, `mergetool`, `switch`, `clone`, `tag`, `log`, `rev-list`, `diff`,
+`show`, `grep`, `help`, `version`, and `new-version`. Other Git commands do not
+need a wrapper and are passed directly to Git.
 
-Most are also exported as direct procedures such as `git-init`, `git-status`, `git-add`,
-`git-fetch`, `git-config`, `git-switch`, `git-tag`, `git-log`, `git-diff`, and `git-show`.
+Most registered commands are also exported as direct procedures such as
+`git-init`, `git-status`, `git-add`, `git-fetch`, `git-config`, `git-switch`,
+`git-tag`, `git-log`, `git-diff`, and `git-show`.
 
 See the Scribble documentation for command-specific behavior and return values.
 
@@ -111,17 +131,41 @@ The non-interactive forms are:
 
 ```racket
 (git* config editor --list)
+(git* config editor --downloads)
 (git* config editor vscode)
+(git* config editor notepad++)
 (git* config editor auto)
 
 (git 'config 'editor "C:\\Program Files\\MyEditor\\editor.exe --wait")
 ```
 
-`--list` returns `(name description command current?)` items. A known editor
-name selects the matching detected editor. `auto` clears the explicit git-cli
-editor choice and returns to automatic detection. Any other single value is
-stored as the editor command. Changing the editor immediately updates
-`GIT_EDITOR` and `GIT_SEQUENCE_EDITOR` for subsequent Git commands.
+`--list` returns `(name description command current?)` items and `--downloads`
+returns official download pointers for optional editors. A known editor name
+selects the matching detected editor. `auto` clears the explicit git-cli editor
+choice and returns to automatic detection. Any other single value is stored as
+the editor command. Changing the editor immediately updates `GIT_EDITOR` and
+`GIT_SEQUENCE_EDITOR` for subsequent Git commands.
+
+On Windows, Notepad++ is detected both on `PATH` and in the normal Program Files
+locations. It is started with `-multiInst -nosession`, so Git waits for the
+separate editor instance to close.
+
+
+`config mergetool` uses the same git-cli configuration pattern:
+
+```racket
+(git* config mergetool)
+(git* config mergetool --list)
+(git* config mergetool --downloads)
+(git* config mergetool winmerge)
+(git* config mergetool auto)
+```
+
+`--list` returns `(name description path current?)` items. A known tool name
+selects the detected tool, while another single value is stored as the Git
+mergetool name. `auto` clears the explicit git-cli choice and returns to
+automatic detection. The interactive form also offers download/install
+suggestions.
 
 ## Low-level Git execution
 
@@ -180,7 +224,7 @@ The editor can be inspected or configured explicitly:
 
 The editor search first checks `PATH` and then well-known platform locations.
 On Windows this includes the normal per-user and Program Files locations for
-VS Code, with Notepad as fallback. On macOS the standard Visual Studio Code
+VS Code and Notepad++, with Notepad as fallback. On macOS the standard Visual Studio Code
 application bundle and TextEdit are recognized. On Linux common `/usr`,
 `/usr/local`, and Snap locations are checked for VS Code, Kate, Gedit, and Xed.
 
@@ -193,8 +237,11 @@ If no tool is found, Git is left to select its own default.
 
 ```racket
 (find-mergetool)
+(find-mergetools)
 (find-mergetool-path)
+(mergetool-downloads)
 (set-mergetool! "winmerge")
+(set-mergetool-auto!)
 (git* mergetool)
 (git* mergetool --tool=meld)
 ```