{
  "id": "hook-surface:claude.session-start",
  "_kind": "HookSurface",
  "_file": "channels-hooks/hook-surfaces/native/hook-surfaces-claude-code.yaml",
  "_cluster": "channels-hooks",
  "attributes": {
    "eventName": "SessionStart (Claude)",
    "displayName": "SessionStart (Claude)",
    "kind": "native",
    "originVendor": "Anthropic",
    "direction": "event",
    "blocking": false,
    "family": "shell-hook",
    "payloadSchema": {
      "type": "object",
      "required": [
        "hook_event_name",
        "source"
      ],
      "properties": {
        "hook_event_name": {
          "type": "string",
          "const": "SessionStart"
        },
        "source": {
          "type": "string",
          "enum": [
            "startup",
            "resume"
          ]
        },
        "cwd": {
          "type": "string"
        },
        "session_id": {
          "type": "string"
        },
        "transcript_path": {
          "type": "string"
        },
        "hookSpecificOutput": {
          "type": "object",
          "properties": {
            "sessionTitle": {
              "type": "string"
            }
          }
        },
        "reloadSkills": {
          "type": "boolean"
        }
      }
    },
    "description": "Claude Code's SessionStart hook. Fires when a session begins or\nresumes. As of v2.1.152, hook output can request a same-session skill\nrescan with reloadSkills: true and can set hookSpecificOutput.sessionTitle.\n"
  },
  "outgoingEdges": [
    {
      "from": "hook-surface:claude.session-start",
      "to": "agentVersion:claude:ge-0-0-0",
      "kind": "emits_hook",
      "attributes": {
        "attrs": {
          "since": "1.0.0"
        }
      }
    }
  ],
  "incomingEdges": [
    {
      "from": "agent-runtime-impl:claude-code.runtime@1.x",
      "to": "hook-surface:claude.session-start",
      "kind": "exposes",
      "attributes": {}
    },
    {
      "from": "hook-mapping:claude-session-start-native",
      "to": "hook-surface:claude.session-start",
      "kind": "maps_hook",
      "attributes": {}
    }
  ]
}