---
name: hooks-80d3a601561c
description: Hook Development Rules
user-invocable: false
---

# Hook Development Rules

When working with files in `.claude/hooks/`:

## Pattern
Shell wrapper (.sh) → TypeScript (.ts) via `npx tsx`

## Shell Wrapper Template
```bash
#!/bin/bash
set -e
cd "$CLAUDE_PROJECT_DIR/.claude/hooks"
cat | npx tsx <handler>.ts
```

## TypeScript Handler Pattern
```typescript
interface HookInput {
  // Event-specific fields
}

async function main() {
  const input: HookInput = JSON.parse(await readStdin());

  // Process input

  const output = {
    result: 'continue',  // or 'block'
    message: 'Optional system reminder'
  };

  console.log(JSON.stringify(output));
}
```

## Hook Events
- **PreToolUse** - Before tool execution (can block)
- **PostToolUse** - After tool execution
- **UserPromptSubmit** - Before processing user prompt
- **PreCompact** - Before context compaction
- **SessionStart** - On session start/resume/compact
- **Stop** - When agent finishes

## Testing
Test hooks manually:
```bash
echo '{"type": "resume"}' | .claude/hooks/session-start-continuity.sh
```

## Registration
Add hooks to `.claude/settings.json`:
```json
{
  "hooks": {
    "EventName": [{
      "matcher": ["pattern"],  // Optional
      "hooks": [{
        "type": "command",
        "command": "$CLAUDE_PROJECT_DIR/.claude/hooks/hook.sh"
      }]
    }]
  }
}
```


---
Source attribution: vibeeval
Original project: https://github.com/vibeeval/vibecosystem/blob/3b763b1fb288f57bfa3cce76ef18184b96461a78/skills/hooks/SKILL.md
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Mega AI Hub.

## Upstream license notice

MIT License

Copyright (c) 2026 vibeeval

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Mega AI Hub resource metadata

Creator / publisher: vibeeval
Original project: https://github.com/vibeeval/vibecosystem/blob/3b763b1fb288f57bfa3cce76ef18184b96461a78/skills/hooks/SKILL.md
Attribution basis: Source repository record

Fields of work: Development & Engineering
Roles: Backend Developer, DevOps / SRE, ML / AI Engineer
Specialties: Backend
Tools: Claude, Tsx
Country applicability: Country not specified
Classification basis: Source catalog labels
Instruction SHA-256: b77acf0996782ca4af8d2c7bdb15c5eb6c0ab071eb2ed660df7cb385b40b10d5