{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://brainbench.dev/schemas/transcript.schema.json",
  "title": "BrainBench Flight-Recorder Transcript",
  "description": "Full tool-call + model-call trace for a single probe run. Written by eval/runner/recorder.ts. Consumed by judge (via evidence-contract) and reviewers.",
  "type": "object",
  "required": ["schema_version", "probe_id", "adapter", "started_at", "ended_at", "turns"],
  "additionalProperties": false,
  "properties": {
    "schema_version": {"type": "integer", "const": 1},
    "probe_id": {"type": "string", "pattern": "^q-[0-9]{4}$"},
    "adapter": {
      "type": "object",
      "required": ["name", "stack_id"],
      "properties": {
        "name": {"type": "string"},
        "stack_id": {"type": "string"}
      }
    },
    "started_at": {"type": "string", "format": "date-time"},
    "ended_at": {"type": "string", "format": "date-time"},
    "turns": {
      "type": "array",
      "description": "Ordered list of model turns + tool executions.",
      "items": {
        "type": "object",
        "required": ["turn_index", "kind"],
        "properties": {
          "turn_index": {"type": "integer", "minimum": 0},
          "kind": {
            "type": "string",
            "enum": ["model_call", "tool_call", "tool_result", "final_answer"]
          },
          "model_call": {
            "type": "object",
            "description": "Present when kind=model_call.",
            "properties": {
              "model_id": {"type": "string"},
              "input_tokens": {"type": "integer"},
              "output_tokens": {"type": "integer"},
              "stop_reason": {"type": "string"}
            }
          },
          "tool_call": {
            "type": "object",
            "description": "Present when kind=tool_call.",
            "properties": {
              "tool_name": {"type": "string"},
              "tool_input": {"type": "object"}
            }
          },
          "tool_result": {
            "type": "object",
            "description": "Present when kind=tool_result. Raw content is NOT passed to judge — structured summary is.",
            "properties": {
              "tool_name": {"type": "string"},
              "content": {"description": "Raw tool output (opaque shape)."},
              "truncated": {"type": "boolean"},
              "matched_poison_fixture_ids": {
                "type": "array",
                "items": {"type": "string"},
                "description": "Bridge-computed: slugs in result that match gold/poison.json fixture_ids."
              }
            }
          },
          "final_answer": {
            "type": "object",
            "description": "Present when kind=final_answer (last turn only).",
            "properties": {
              "text": {"type": "string"},
              "evidence_refs": {
                "type": "array",
                "items": {"type": "string"},
                "description": "Slugs the agent cited in the final answer."
              }
            }
          }
        }
      }
    },
    "total_input_tokens": {"type": "integer", "minimum": 0},
    "total_output_tokens": {"type": "integer", "minimum": 0},
    "elapsed_ms": {"type": "integer", "minimum": 0}
  }
}