PR #21545 runtime verification on Linux

github/main: 32ecd71726; PR head: f75202197ff41e660ee2cf626e7dd695c585fd7d

Browser: repository Playwright 1.60.0, /usr/bin/google-chrome, real dev web client.

Created project and worktree thread through UI. Codex gpt-6.1-sol replied: cleanup verification ready.

Cleanup rule selected in UI: worktreeSettledAfterDays=0.

UI cleanup with terminal: 0 removed, 1 kept, Open terminal.

UI terminal command: printf verification > cleanup-neighbor.txt

Closed both terminals. UI cleanup: 0 removed, 1 kept, Has uncommitted changes (1 file).

UI terminal command: rm -- cleanup-neighbor.txt; exit

WebSocket server.runStorageCleanup, before runtime release:

{
  "trigger": "manual",
  "startedAt": "2026-10-30T12:31:39.711Z",
  "finishedAt": "2026-10-30T12:31:39.771Z",
  "entries": [
    {
      "kind": "worktree",
      "outcome": "kept",
      "reason": "Provider session is still open",
      "path": "/home/user/t3code/.t3/worktrees/cleanup-verification/t3-c0ba6e1d",
      "projectPath": "/home/user/cleanup-verification",
      "threadId": "9f07f48f-975e-4900-8183-2c616266e21a",
      "threadTitle": "Cleanup verification ready",
      "bytes": null,
      "files": null
    }
  ],
  "counts": {
    "removed": 0,
    "kept": 1,
    "failed": 0
  },
  "omittedCount": 0,
  "bytesFreed": 0
}

Stopped only task dev server process group, captured PID 30073. Restarted same isolated state, captured PID 46339.

UI Delete now, then WebSocket server.getStorageCleanupReport:

{
  "trigger": "manual",
  "startedAt": "2026-10-30T12:33:11.053Z",
  "finishedAt": "2026-10-30T12:33:11.562Z",
  "entries": [
    {
      "kind": "worktree",
      "outcome": "removed",
      "reason": "Settled for 0 days",
      "path": "/home/user/t3code/.t3/worktrees/cleanup-verification/t3-c0ba6e1d",
      "projectPath": "/home/user/cleanup-verification",
      "threadId": "9f07f48f-975e-4900-8183-2c616266e21a",
      "threadTitle": "Cleanup verification ready",
      "bytes": 4096,
      "files": null
    }
  ],
  "counts": {
    "removed": 1,
    "kept": 0,
    "failed": 0
  },
  "omittedCount": 0,
  "bytesFreed": 4096
}

Filesystem: worktree directory absent. git branch --list: t3/cleanup-verification retained.

Blacksmith: vp test run apps/server/src/storageCleanup.test.ts: 138 passed.

Windows case-insensitive equality cannot be reproduced or proven on this Linux filesystem.

Client Restart agent session did not release the shared runtime. Explicit provider-session.detach failed ownership validation; server restart released it.