PR 27771 real provider verification, Linux Boat VM, 2026-11-01
main: ce48e45900; original PR: 9cdbc5aa4f; fixed: 0a5f9ce12a
provider: real codex-acp 2.2.2, Codex gpt-6.1-sol through local proxy
client: real dev web app, repo Playwright, /usr/bin/google-chrome

$ node /tmp/pr27771-runtime.mjs /home/user/main
new session 01a19573-6813-7862-a658-8c628b807c3e
initialize shape {
  name: '@agentclientprotocol/codex-acp',
  title: 'Codex',
  version: '2.2.2'
} {
  list: {},
  delete: {},
  additionalDirectories: {},
  fork: {},
  resume: {},
  close: {}
}
close { _id: 'Result', _tag: 'Success', value: {} }
delete {
  _id: 'Result',
  _tag: 'Failure',
  failure: {
    _tag: 'AcpRequestError',
    code: -32601,
    errorMessage: 'Method not found: session/delete'
  }
}

$ node /tmp/pr27771-runtime.mjs /home/user/t3code cold <real-session-id>
original PR head, before followup fix:
cold-delete {
  _id: 'Result',
  _tag: 'Failure',
  failure: {
    _tag: 'AcpRequestError',
    code: -32601,
    errorMessage: 'Method not found: session/delete'
  }
}

$ node /tmp/pr27771-runtime.mjs /home/user/t3code
fixed head:
new session 01a19579-0573-7471-9c27-a68bd8dbbc68
initialize shape {
  name: '@agentclientprotocol/codex-acp',
  title: 'Codex',
  version: '2.2.2'
} {
  list: {},
  delete: {},
  additionalDirectories: {},
  fork: {},
  resume: {},
  close: {}
}
close { _id: 'Result', _tag: 'Success', value: {} }
delete { _id: 'Result', _tag: 'Success', value: {} }

Running-app verification through WebSocket -> registry manager -> ACP runtime:
- UI-created project points at real /home/user/t3code git repository.
- Real gpt-6.1-sol replies: ACP_VERIFICATION_27771, ACP_NEIGHBOR_27771, ACP_FOLLOWUP_OK.
- T3 thread deletion keeps native ACP session; imported session delete is disabled.
- Import retained session and resume: real reply ACP_IMPORTED_OK.
- Delete imported T3 thread, cancel native deletion: native session remains listed.
- Confirm native deletion: ACP session deleted toast; refresh lists no sessions.
- Transparent stdio capture shows v1 agentInfo and sessionCapabilities.delete={}.
- Actual session/delete response {}. No mocks, fixtures, or demo turns.

Blacksmith:
- Existing test modified to construct delete effect before initialize.
- Original PR: supported v1/v2 rows fail -32601; unsupported rows pass.
- Fixed: all 32 client tests pass.
- vp run check:changed passes format, lint, both knip passes, 14 package typechecks, 33 tests.