Hookable is small programs for using arbitrary commands as Claude Code hook decisions.
docs: rename sdiff -> adiff
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README.md
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README.md
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Show a diff interactively and press `y`/`n` to decide:
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```bash
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hookable --interactive --cmd "sdiff before.rb after.rb"
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hookable --interactive --cmd "adiff before.rb after.rb"
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```
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Use a custom accept keybinding:
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hookable --interactive --cmd "git diff HEAD" --accept-key "ctrl+y" --reject-key "ctrl+n"
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```
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Show a diff from a command that exits non-zero (e.g. `sdiff` exits 1 when files differ) and still wait for the user to accept or reject:
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Show a diff from a command that exits non-zero (e.g. `adiff` exits 1 when files differ) and still wait for the user to accept or reject:
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```bash
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hookable --interactive --no-exit-code --cmd "sdiff before.py after.py"
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hookable --interactive --no-exit-code --cmd "adiff before.py after.py"
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```
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## Environment variables
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String values are unquoted; booleans, numbers, and nested objects are left as raw JSON.
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## Using hookable with sdiff
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## Using hookable with adiff
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[sdiff](https://github.com/acaloiaro/sdiff) is a side-by-side diff TUI that reads `HOOKABLE_*` environment variables directly. When invoked with no file arguments it constructs the diff from the hook payload automatically:
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[adiff](https://github.com/acaloiaro/adiff) is a side-by-side diff TUI that reads `HOOKABLE_*` environment variables directly. When invoked with no file arguments it constructs the diff from the hook payload automatically:
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- **Edit** — diffs the current file against the result of applying `old_string → new_string`
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- **Write** — diffs the current file against the new content
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"PreToolUse": [
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{
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"matcher": "Edit",
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"hooks": [{"type": "command", "command": "hookable --interactive --no-exit-code --cmd 'sdiff -i'"}]
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"hooks": [{"type": "command", "command": "hookable --interactive --no-exit-code --cmd 'adiff -i'"}]
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},
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{
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"matcher": "Write",
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"hooks": [{"type": "command", "command": "hookable --interactive --no-exit-code --cmd 'sdiff -i'"}]
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"hooks": [{"type": "command", "command": "hookable --interactive --no-exit-code --cmd 'adiff -i'"}]
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}
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]
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}