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Use this page when you need exact hook vocabulary and structure rather than a procedural walkthrough.

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Core enums

TypeValues
HookPointRunStarted, PreLlmRequest, PreToolExecution, TurnBoundary, PostLlmResponse, PostToolExecution, RunCompleted, RunFailed
HookCapabilityObserve, Guardrail
HookExecutionModeForeground, Background

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Runtime families

  • in-process
  • command
  • HTTP

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Payload highlights

  • HookInvocation
  • HookToolResult
  • HookDecision

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See also