Hawthorn f65ab491be fix(docs): clarify Stop event matcher is optional, not disallowed
Validator (scripts/ci/validate-hooks.js line 182-184) only errors when
matcher is missing for non-EVENTS_WITHOUT_MATCHER events. For Stop (in
EVENTS_WITHOUT_MATCHER), matcher is optional — presence is allowed and
validated for type correctness, absence is also accepted.
2026-06-10 18:21:12 +05:30

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# Hook Integration for Session-Stop Self-Evaluation
Add this hook to `hooks/hooks.json` to remind the agent to self-evaluate at the end of every session (the hook echoes a reminder; it does not run the evaluator automatically):
```json
{
"hooks": {
"Stop": [
{
"hooks": [
{
"type": "command",
"command": "echo '[Self-Eval] Session complete. Consider running agent-self-evaluation to rate your output.'"
}
],
"description": "Remind agent to self-evaluate at session end"
}
]
}
}
```
`Stop` events do not require a `matcher` field (it is optional for `Stop`, `Notification`, `UserPromptSubmit`, and `SubagentStop` per `scripts/ci/validate-hooks.js`). If omitted, the hook object only needs `hooks` and metadata such as `description`.
## Integration with the Python Evaluator
The `scripts/evaluate.py` script can be used as a standalone tool:
```bash
# Pipe agent output directly
echo "Your agent response here" | python3 skills/agent-self-evaluation/scripts/evaluate.py
# From files
python3 skills/agent-self-evaluation/scripts/evaluate.py --task task.txt --output response.txt
```
To integrate it into hooks, capture the last agent output to a file first, then run the evaluator. For lightweight reminders after shell-based verification, use a simple supported matcher string:
```json
{
"PostToolUse": [
{
"matcher": "Bash",
"hooks": [
{
"type": "command",
"command": "echo '[Self-Eval] If this command completed verification for a non-trivial task, consider running agent-self-evaluation.'"
}
],
"description": "Remind agent to self-evaluate after shell verification"
}
]
}
```
This avoids documenting unsupported command-expression matcher syntax. If your harness supports command-level matcher expressions, prefer a word-boundary regex such as `\b(pytest|npm test|go test)\b` rather than a broad `test` substring.
These hooks are opt-in. Add them to your local `hooks/hooks.json` if you want automated evaluation prompts.
## Manual Usage (Recommended)
The most reliable approach is manual invocation — the agent runs self-evaluation as part of its workflow when the `agent-self-evaluation` skill is active, without requiring hook configuration. The skill's "When to Activate" section already covers trigger conditions (multi-file changes, debugging sessions, design documents).