create-hook

Create a hook: a script Claude Code runs on a lifecycle event (before a tool, after a prompt, on stop, and so on). Make it do one deterministic thing, fail safe, and ship with documentation a user can paste into `settings.json`. Then regenerate the derived files and validate. Source layout is `hooks/<category>/<name>/HOOK.md` plus the script. Hooks are **folder-layout**: the whole folder installs to `.claude/hooks/<name>/`, so the script and any helpers ride along. The **category is the folder**; `registry.json` and the README catalog are *generated* by `pnpm gen`. Never hand-edit generated files. Hooks differ from skills, agents, and commands in one critical way: **they are configuration, not a loadable file.** The shadcn installer copies the script and `HOOK.md` but cannot edit a user's `settings.json`. So `HOOK.md` must document the exact settings block to add, and the hook is inert until the user adds it. ## Hard rules: never break these - **Fail safe and non-blocking by default.** Unless the hook's job is to block, swallow its own errors and exit `0` so it can never interrupt or break a tool call or session. Exit `2` *only* when blocking is the intended behavior for that event. - **`HOOK.md` must document activation.** Include the precise `settings.json` block, the event, the matcher, and the command line. Without it the hook does nothing after install. - **Be safe with data.** Hooks see tool inputs and outputs. Redact secret-looking fields and truncate large payload...