{
  "issue": "https://git.cafe/pingdotgg/t3code/issues/23837",
  "commit": "7f7daad98503dc049b7230465ae3863d71f197e4",
  "result": "Reproduced in real web app",
  "method": "Authorized synthetic persisted projection fixture; no live delegate or provider execution; no component harness; no application code changes.",
  "steps": [
    "Created detached /home/ubuntu/wt/issue-23837 from fetched origin/main; vp install.",
    "Started T3CODE_DEV_SEED=0 vp run dev; server 14710, web 6670; paired Browser panel.",
    "Stopped server for fixture writes using t3-sqlite-state helper. Seeded app-owned completed task with Astra/high launch selection; linked child creationSource=mcp and lineage relationship=subagent; child current modelSelection=Sol/xhigh; parent completed run and message/turn items.",
    "Opened fresh incognito Browser profile and paired; opened parent, expanded Thread details > Lineage > Previous agents, hovered Child switched to Sol.",
    "Observed hover GPT-6-Astra · high. Clicked child and observed composer GPT-6.1-Sol / Extra High."
  ],
  "runtime": [
    {
      "thread": {
        "createdBy": "system",
        "creationSource": "server",
        "id": "thread:project:98f8a240-c7f0-496c-a856-87acd880493b:9f5f29ba-f1f9-4db0-a622-f9816a191849",
        "projectId": "98f8a240-c7f0-496c-a856-87acd880493b",
        "title": "Lineage reproduction parent",
        "providerInstanceId": "codex",
        "modelSelection": {
          "instanceId": "codex",
          "model": "gpt-6-astra",
          "options": [
            {
              "id": "reasoningEffort",
              "value": "high"
            }
          ]
        },
        "runtimeMode": "full-access",
        "interactionMode": "default",
        "branch": null,
        "worktreePath": null,
        "pullRequests": [],
        "activeProviderThreadId": null,
        "lineage": {
          "parentThreadId": null,
          "relationshipToParent": null,
          "rootThreadId": "thread:project:98f8a240-c7f0-496c-a856-87acd880493b:9f5f29ba-f1f9-4db0-a622-f9816a191849"
        },
        "forkedFrom": null,
        "createdAt": "2026-10-24T12:39:01.314Z",
        "updatedAt": "2026-10-24T12:40:00.000Z",
        "archivedAt": null,
        "settledOverride": null,
        "settledAt": null,
        "snoozedUntil": null,
        "snoozedAt": null,
        "lastVisitedAt": "2026-10-24T12:40:00.000Z",
        "opens": {
          "openedAt": 1792845563014,
          "score": 1,
          "picks": []
        },
        "deletedAt": null
      },
      "subagents": [
        {
          "id": "issue-23837-task",
          "threadId": "thread:project:98f8a240-c7f0-496c-a856-87acd880493b:9f5f29ba-f1f9-4db0-a622-f9816a191849",
          "runId": "issue-23837-run",
          "parentNodeId": "issue-23837-launch",
          "origin": "app_owned",
          "createdBy": "agent",
          "driver": "codex",
          "providerInstanceId": "codex",
          "providerThreadId": null,
          "childThreadId": "issue-23837-child",
          "nativeTaskRef": null,
          "prompt": "Synthetic delegated task fixture",
          "title": "Child switched to Sol",
          "model": "gpt-6-astra",
          "modelSelection": {
            "instanceId": "codex",
            "model": "gpt-6-astra",
            "options": [
              {
                "id": "reasoningEffort",
                "value": "high"
              }
            ]
          },
          "status": "completed",
          "result": "Synthetic task complete; child current selection is Sol / Extra High.",
          "startedAt": "2026-10-24T12:40:00.000Z",
          "completedAt": "2026-10-24T12:40:00.000Z",
          "updatedAt": "2026-10-24T12:40:00.000Z"
        }
      ]
    },
    {
      "thread": {
        "createdBy": "agent",
        "creationSource": "mcp",
        "id": "issue-23837-child",
        "projectId": "98f8a240-c7f0-496c-a856-87acd880493b",
        "title": "Child switched to Sol",
        "providerInstanceId": "codex",
        "modelSelection": {
          "instanceId": "codex",
          "model": "gpt-6.1-sol",
          "options": [
            {
              "id": "reasoningEffort",
              "value": "xhigh"
            }
          ]
        },
        "runtimeMode": "full-access",
        "interactionMode": "default",
        "branch": null,
        "worktreePath": null,
        "pullRequests": [],
        "activeProviderThreadId": null,
        "lineage": {
          "parentThreadId": "thread:project:98f8a240-c7f0-496c-a856-87acd880493b:9f5f29ba-f1f9-4db0-a622-f9816a191849",
          "relationshipToParent": "subagent",
          "rootThreadId": "thread:project:98f8a240-c7f0-496c-a856-87acd880493b:9f5f29ba-f1f9-4db0-a622-f9816a191849"
        },
        "forkedFrom": null,
        "createdAt": "2026-10-24T12:39:01.314Z",
        "updatedAt": "2026-10-24T12:40:00.000Z",
        "archivedAt": null,
        "settledOverride": null,
        "settledAt": null,
        "snoozedUntil": null,
        "snoozedAt": null,
        "lastVisitedAt": "2026-10-24T12:40:00.000Z",
        "opens": {
          "openedAt": 1792845563014,
          "score": 1,
          "picks": []
        },
        "deletedAt": null
      },
      "subagents": []
    }
  ],
  "friction": [
    "Default dev runner starts auto-seeding live data read-only; stopped, removed isolated partial copy, restarted with T3CODE_DEV_SEED=0.",
    "Direct persisted writes do not advance snapshotSequence: original browser profile reused earlier empty thread cache; fresh incognito profile loaded current fixture.",
    "Initial fixture creationSource=subagent rejected by schema; corrected to mcp before successful startup.",
    "No infrastructure blocker."
  ],
  "scope": "Local web Chromium 1280x800 only. Contributor fix not applied or tested."
}