[
  {
    "type": "assistant/message",
    "seq": 148,
    "time": 1721119500000,
    "surfaceOp": "append",
    "data": {
      "turn": 17,
      "step": 8,
      "content": [
        {
          "type": "text",
          "text": "…last assistant message, turn ends here…"
        }
      ]
    }
  },
  {
    "type": "turn/end",
    "seq": 149,
    "time": 1721119500010,
    "data": {
      "turn": 17,
      "reason": {
        "kind": "completed"
      }
    }
  },
  {
    "type": "compact/start",
    "seq": 150,
    "time": 1721119510000,
    "data": {
      "turn": 17
    }
  },
  {
    "type": "compact/summary",
    "seq": 151,
    "time": 1721119512500,
    "data": {
      "summary": [
        {
          "type": "text",
          "text": "Session so far (seqs 1–149, turns 0–17): user asked to audit and translate SessionEventMap comments across 3 core packages; assistant used workflow(iter) to loop, translated 32+18+25 blocks total, ran typecheck+lint+coverage gates all green; found 0 regressions. Next likely: extend to bash/fs packages or land as a PR."
        }
      ],
      "shadowedRange": {
        "start": 1,
        "end": 149
      },
      "shadowedSeqs": [],
      "shadowedTokenCount": 32180,
      "model": "deepseek-chat",
      "maxTokens": 512
    }
  },
  {
    "type": "compact/end",
    "seq": 152,
    "time": 1721119512600,
    "data": {
      "turn": 17
    }
  },
  {
    "type": "user/message",
    "seq": 153,
    "time": 1721119512700,
    "surfaceOp": "append",
    "data": {
      "content": [
        {
          "type": "text",
          "text": "Session so far (seqs 1–149, turns 0–17): user asked to audit and translate SessionEventMap comments across 3 core packages; assistant used workflow(iter) to loop, translated 32+18+25 blocks total, ran typecheck+lint+coverage gates all green; found 0 regressions. Next likely: extend to bash/fs packages or land as a PR."
        }
      ],
      "source": {
        "kind": "plugin",
        "plugin": "compact"
      }
    }
  },
  {
    "_note": "shadowedSeqs is kept as an empty array in the sample to keep the file small; on a real machine it would be [1, 2, ..., 149] or a subset. The frontend can render shadowedRange from range boundaries alone to display \"149 events compressed\"."
  }
]