[
  { "type": "turn/start", "seq": 1, "time": 1721260000000, "data": { "turn": 0, "trigger": { "kind": "message" } } },
  { "type": "user/message", "seq": 2, "time": 1721260000010, "surfaceOp": "append", "data": { "content": [{ "type": "text", "text": "Read the ranker docs, then implement fastPath, then verify the tests." }] } },
  { "type": "request/header", "seq": 3, "time": 1721260000020, "data": { "requestId": "req-001", "provider": "deepseek", "responseModel": "deepseek-chat" } },
  { "type": "step/start", "seq": 4, "time": 1721260000100, "data": { "turn": 0, "step": 0 } },
  { "type": "assistant/message", "seq": 5, "time": 1721260000900, "surfaceOp": "append", "data": { "turn": 0, "step": 0, "content": [{ "type": "text", "text": "I'll start by reading the ranker docs." }], "usage": { "inputTokens": 420, "outputTokens": 32 } } },
  { "type": "step/end", "seq": 6, "time": 1721260000910, "data": { "turn": 0, "step": 0 } },

  { "type": "step/start", "seq": 7, "time": 1721260001000, "data": { "turn": 0, "step": 1 } },
  { "type": "tool/call", "seq": 8, "time": 1721260001100, "data": { "turn": 0, "step": 1, "callId": "call_read_1", "name": "Read", "arguments": "{\"path\":\"docs/ranker.md\"}" } },
  { "type": "tool/result", "seq": 9, "time": 1721260001600, "surfaceOp": "append", "data": { "turn": 0, "step": 1, "callId": "call_read_1", "content": [{ "type": "text", "text": "ranker: computes candidate scores…" }], "isError": false, "meta": { "card": "generic" } } },
  { "type": "step/end", "seq": 10, "time": 1721260001610, "data": { "turn": 0, "step": 1 } },

  { "type": "step/start", "seq": 11, "time": 1721260001700, "data": { "turn": 0, "step": 2 } },
  { "type": "assistant/message", "seq": 12, "time": 1721260002300, "surfaceOp": "append", "data": { "turn": 0, "step": 2, "content": [{ "type": "text", "text": "Docs read. Editing the ranker to add fastPath." }], "usage": { "inputTokens": 780, "outputTokens": 44 } } },
  { "type": "step/end", "seq": 13, "time": 1721260002310, "data": { "turn": 0, "step": 2 } },

  { "type": "step/start", "seq": 14, "time": 1721260002400, "data": { "turn": 0, "step": 3 } },
  { "type": "tool/call", "seq": 15, "time": 1721260002500, "data": { "turn": 0, "step": 3, "callId": "call_edit_1", "name": "Edit", "arguments": "{\"path\":\"src/ranker.ts\",\"oldString\":\"function score(\",\"newString\":\"function fastPath(x){return x.pinned?1:0}\\nfunction score(\"}" } },
  { "type": "tool/result", "seq": 16, "time": 1721260003000, "surfaceOp": "append", "data": { "turn": 0, "step": 3, "callId": "call_edit_1", "content": [{ "type": "text", "text": "OK — 1 edit applied" }], "isError": false, "meta": { "card": "diff" } } },
  { "type": "step/end", "seq": 17, "time": 1721260003010, "data": { "turn": 0, "step": 3 } },

  { "type": "step/start", "seq": 18, "time": 1721260003100, "data": { "turn": 0, "step": 4 } },
  { "type": "tool/call", "seq": 19, "time": 1721260003200, "data": { "turn": 0, "step": 4, "callId": "call_bash_1", "name": "Bash", "arguments": "{\"command\":\"pnpm test src/ranker.test.ts\"}" } },
  { "type": "tool/result", "seq": 20, "time": 1721260004000, "surfaceOp": "append", "data": { "turn": 0, "step": 4, "callId": "call_bash_1", "content": [{ "type": "text", "text": "PASS  src/ranker.test.ts (14/14)" }], "isError": false, "meta": { "card": "terminal" } } },
  { "type": "step/end", "seq": 21, "time": 1721260004010, "data": { "turn": 0, "step": 4 } },

  { "type": "step/start", "seq": 22, "time": 1721260004100, "data": { "turn": 0, "step": 5 } },
  { "type": "assistant/message", "seq": 23, "time": 1721260005000, "surfaceOp": "append", "data": { "turn": 0, "step": 5, "content": [{ "type": "text", "text": "Done. fastPath added and tests pass (14/14)." }], "usage": { "inputTokens": 1220, "outputTokens": 28 } } },
  { "type": "step/end", "seq": 24, "time": 1721260005010, "data": { "turn": 0, "step": 5 } },

  { "type": "turn/end", "seq": 25, "time": 1721260005020, "data": { "turn": 0, "reason": { "kind": "completed" } } }
]