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Version: 0.10.4

CC-HK-013: Async on Non-Command Hook - Claude Hooks

Summary​

  • Rule ID: CC-HK-013
  • Severity: HIGH
  • Category: Claude Hooks
  • Normative Level: MUST
  • Auto-Fix: Yes (safe)
  • Verified On: 2026-02-07

Applicability​

  • Tool: claude-code
  • Version Range: unspecified
  • Spec Revision: unspecified

Evidence Sources​

Test Coverage Metadata​

  • Unit tests: true
  • Fixture tests: true
  • E2E tests: false

Examples​

The following examples demonstrate what triggers this rule and how to fix it.

Invalid​

{
  "hooks": {
    "Stop": [
      {
        "hooks": [
          { "type": "prompt", "prompt": "Summarize", "async": true, "timeout": 30 }
        ]
      }
    ]
  }
}

Valid​

{
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "Bash",
        "hooks": [
          { "type": "command", "command": "echo ok", "timeout": 30 }
        ]
      }
    ]
  }
}