Claude Code hooks as example that you can use and alter as you wish.
https://code.claude.com/docs/en/hooks-guide
Start Claude code then enter /hooks like this:
➜ claude
▐▛███▜▌ Claude Code v2.1.39
▝▜█████▛▘ Opus 4.6 · Claude Max
▘▘ ▝▝
❯ /hooks
───────────────────────────────────────────────────────────────────────────────────────
Hooks
1. PreToolUse - Before tool execution
2. PostToolUse - After tool execution
3. PostToolUseFailure - After tool execution fails
4. Notification - When notifications are sent
5. UserPromptSubmit - When the user submits a prompt
6. SessionStart - When a new session is started
7. Stop - Right before Claude concludes its response
8. SubagentStart - When a subagent (Task tool call) is started
9. SubagentStop - Right before a subagent (Task tool call) concludes its response
10. PreCompact - Before conversation compaction
11. SessionEnd - When a session is ending
12. PermissionRequest - When a permission dialog is displayed
13. Setup - Repo setup hooks for init and maintenance
14. TeammateIdle - When a teammate is about to go idle
15. TaskCompleted - When a task is being marked as completed
16. Disable all hooks