{
  "id": "hook-surface:phase-change-check",
  "_kind": "HookSurface",
  "_file": "channels-hooks/hook-surfaces/canonical/phase-change-check.yaml",
  "_cluster": "channels-hooks",
  "attributes": {
    "eventName": "PhaseChangeCheck (a5c canonical)",
    "displayName": "PhaseChangeCheck (a5c canonical)",
    "kind": "canonical",
    "direction": "pre",
    "blocking": true,
    "family": "in-process",
    "payloadSchema": {
      "type": "object",
      "required": [
        "fromPhase",
        "toPhase",
        "runId"
      ],
      "properties": {
        "fromPhase": {
          "type": "string"
        },
        "toPhase": {
          "type": "string"
        },
        "runId": {
          "type": "string"
        }
      }
    },
    "description": "Blocking gate fired before a PhaseTransition. Handlers may abort\nthe transition.\n"
  },
  "outgoingEdges": [],
  "incomingEdges": [
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "hook-surface:phase-change-check",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "hook-mapping:phase-change-check-babysitter",
      "to": "hook-surface:phase-change-check",
      "kind": "maps_hook",
      "attributes": {}
    }
  ]
}