{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "ImplementationCallback",
  "description": "Used when callback delivery is selected by adaptive execution or required by the orchestrator-callback profile.",
  "type": "object",
  "additionalProperties": false,
  "required": ["type", "orchestrator_thread_id", "source_thread_id", "phase_issue_id", "status", "branch", "pr", "commits", "turn_doc", "local_gates", "changed_files", "execution_summary", "blockers", "context_to_keep"],
  "properties": {
    "type": { "const": "implementation-callback" },
    "orchestrator_thread_id": { "type": "string", "minLength": 1 },
    "source_thread_id": { "type": "string", "minLength": 1 },
    "phase_issue_id": { "type": "string", "minLength": 1 },
    "status": { "enum": ["pr-ready", "done", "blocked"] },
    "branch": { "type": ["string", "null"] },
    "pr": { "type": ["string", "null"] },
    "commits": { "type": "array", "items": { "type": "string" } },
    "turn_doc": { "type": "string", "minLength": 1 },
    "local_gates": { "type": "array", "items": { "type": "string" } },
    "changed_files": { "type": "array", "items": { "type": "string" } },
    "execution_summary": { "$ref": "execution-summary.schema.json" },
    "blockers": { "type": "array", "items": { "type": "string" } },
    "context_to_keep": { "type": "array", "maxItems": 5, "items": { "type": "string" } }
  }
}