{
  "main": "70e5e384da",
  "environment": "Linux x86_64; Node 24.21.0; Claude Code 2.1.303; Claude Opus 5.5; real web dev app; browser viewport 1280x800",
  "setup": "Disposable native Claude session. Read 1400 lines of Greek-letter filler (14 x 100-line Read calls, allow_large=true). Fixture initially had 4000 lines, reduced to 1400 during loading to avoid native auto-compaction. Started sleep 180 with run_in_background=true. No direct state writes. A preceding Codex READY turn was followed by Claude READY before the long-context preparation; no instance/model switch during the measured probes.",
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    "Run 4: Fast Mode off to on while sleep command pending; GUARD_PROBE, completed.",
    "Run 5: effort medium to high while same sleep command pending; EFFORT_PROBE, completed.",
    "Run 6: native background-command completion notification; completed.",
    "Run 7: after-background retry 1; RETRY_ONE, completed.",
    "Run 8: after-background retry 2; RETRY_TWO, completed."
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          "description": "Sleep for 180 seconds in the background",
          "kind": "command"
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      ],
      "updatedAt": "2026-10-21T22:34:01.487Z"
    }
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        "instanceId": "codex",
        "model": "gpt-6-astra"
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      "completedAt": "2026-10-21T22:31:07.138Z"
    },
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        ]
      },
      "requestedAt": "2026-10-21T22:31:20.323Z",
      "completedAt": "2026-10-21T22:31:23.919Z"
    },
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      "ordinal": 3,
      "status": "completed",
      "modelSelection": {
        "instanceId": "claudeAgent",
        "model": "claude-opus-5-5",
        "options": [
          {
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            "value": false
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        ]
      },
      "requestedAt": "2026-10-21T22:31:37.283Z",
      "completedAt": "2026-10-21T22:32:43.702Z"
    },
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      "modelSelection": {
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        "model": "claude-opus-5-5",
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            "value": "medium"
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          {
            "id": "fastMode",
            "value": true
          }
        ]
      },
      "requestedAt": "2026-10-21T22:33:28.598Z",
      "completedAt": "2026-10-21T22:33:30.875Z"
    },
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      "status": "completed",
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        "instanceId": "claudeAgent",
        "model": "claude-opus-5-5",
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          {
            "id": "fastMode",
            "value": true
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          {
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            "value": true
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      "completedAt": "2026-10-21T22:35:43.098Z"
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      "ordinal": 7,
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        "instanceId": "claudeAgent",
        "model": "claude-opus-5-5",
        "options": [
          {
            "id": "effort",
            "value": "high"
          },
          {
            "id": "fastMode",
            "value": true
          }
        ]
      },
      "requestedAt": "2026-10-21T22:35:54.473Z",
      "completedAt": "2026-10-21T22:35:57.039Z"
    },
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      "ordinal": 8,
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      "modelSelection": {
        "instanceId": "claudeAgent",
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      "completedAt": "2026-10-21T22:36:07.634Z"
    }
  ],
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      "status": "completed",
      "tokenUsage": {
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        "updatedAt": "2026-10-21T22:31:07.097Z"
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      "startedAt": "2026-10-21T22:31:03.420Z",
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        "updatedAt": "2026-10-21T22:31:23.874Z"
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      "startedAt": "2026-10-21T22:31:20.441Z",
      "completedAt": "2026-10-21T22:31:23.890Z"
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      "startedAt": "2026-10-21T22:33:28.666Z",
      "completedAt": "2026-10-21T22:33:30.853Z"
    },
    {
      "ordinal": 4,
      "status": "completed",
      "tokenUsage": {
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        "maxTokens": 1000000,
        "inputTokens": 824911,
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      "startedAt": "2026-10-21T22:33:59.504Z",
      "completedAt": "2026-10-21T22:34:01.478Z"
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    {
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      "status": "completed",
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        "inputTokens": 825303,
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      },
      "startedAt": "2026-10-21T22:35:40.653Z",
      "completedAt": "2026-10-21T22:35:43.068Z"
    },
    {
      "ordinal": 6,
      "status": "completed",
      "tokenUsage": {
        "usedTokens": 825426,
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        "inputTokens": 825416,
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        "promptCacheExpiresAt": "2026-10-21T23:35:56.982Z",
        "updatedAt": "2026-10-21T22:35:56.988Z"
      },
      "startedAt": "2026-10-21T22:35:54.631Z",
      "completedAt": "2026-10-21T22:35:57.000Z"
    },
    {
      "ordinal": 7,
      "status": "completed",
      "tokenUsage": {
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      "startedAt": "2026-10-21T22:36:05.744Z",
      "completedAt": "2026-10-21T22:36:07.614Z"
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  ],
  "limitations": "Did not recreate a thread already wedged on the older nightly. Does not prove the generic zero-budget handoff path is fixed. macOS, Electron and mobile not tested."
}