Fix Codex writer ownership on Vault and CLI restore - #11994
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…ter-restore # Conflicts: # Sources/SessionIndexModels.swift # Sources/SessionIndexView.swift # cmux.xcodeproj/project.pbxproj # cmuxTests/SessionEntryResumeLaunchTests.swift
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Included review availability: Your plan provides up to 10 included reviews per hour; 3 remain after this review. 📝 WalkthroughWalkthroughAdds Codex writer-lock inspection and ownership mapping before restore. Propagates the effective Codex home through indexed and structured resumes. Replaces static session actions with asynchronous coordination and adds unit, integration, and CI coverage. ChangesCodex restore and session coordination
Estimated code review effort: 4 (Complex) | ~60 minutes Merge Risk: 🟡 Moderate · up to This change adds writer-safe Codex restore and session coordination, but unavailable ownership checks may provide no actionable explanation and large session indexes may become slow due to repeated workspace scans. These issues should be addressed before merge unless explicitly accepted. Sequence Diagram(s)sequenceDiagram
participant Vault
participant SessionEntryResumeCoordinator
participant CodexWriterRestorePreflight
participant CodexWriterProcessInspector
participant TabManager
Vault->>SessionEntryResumeCoordinator: resume or open session
SessionEntryResumeCoordinator->>CodexWriterRestorePreflight: inspect Codex lock and launch inputs
CodexWriterRestorePreflight->>CodexWriterProcessInspector: validate lock owners
CodexWriterProcessInspector-->>CodexWriterRestorePreflight: return owner scan
CodexWriterRestorePreflight-->>SessionEntryResumeCoordinator: return restore inspection
SessionEntryResumeCoordinator->>TabManager: focus owner or launch session
Important Pre-merge checks failedPlease resolve all errors before merging. Addressing warnings is optional. ❌ Failed checks (1 error, 1 warning)
✅ Passed checks (13 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 21.21% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 99 functions across 34 files. (2 skipped: 2 unsupported.) Full details: Cmux Algorithmic ComplexityExplanation The PR adds a nested scalable scan in Resolution Build a workspace dictionary or set keyed by workspace ID once per presentation snapshot, then resolve each live-index panel in O(1). Prefer a cached one-pass projection for ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Actionable comments posted: 6
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Inline comments:
In
`@Packages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/AgentRestorePlanner.swift`:
- Line 111: Update the codexResumeSessionID assignment in AgentRestorePlanner to
use the same trimmed/normalized checkpoint ID as plannedArguments, while
preserving the existing codex and resumeAgent conditions.
In `@Resources/Localizable.xcstrings`:
- Line 69277: Update the localized recovery text for
codex.restore.legacyScopeUnavailable and codex.restore.writerUnknown to remove
CODEX_HOME, session IDs, and diagnostic commands; instruct users to continue or
resume Codex in the original terminal and review the displayed lock information,
without suggesting a retry from cmux.
In `@Sources/CodexWriterRestoreMessage.swift`:
- Around line 20-21: Update the restore error messages in
CodexWriterRestoreMessage and the related CLIError/NSAlert presentation to use
generic recovery text without session IDs, lock paths, PIDs, or working
directories. Remove String(reflecting:) and any other raw host diagnostics from
user-facing output, while preserving ownership details only through the
authorized diagnostic surface.
- Around line 11-13: Add catalog entries for all six Codex writer restore
localization keys in Localizable.xcstrings for every supported locale, including
the 18 locales beyond en and ja. Reuse the approved English fallback convention
where no translated value is available, and preserve the existing en and ja
entries.
In `@Sources/RightSidebarPanelView.swift`:
- Line 432: Update the focus invocation in RightSidebarPanelView so its Task is
stored in caller-owned state, canceling any existing focus task before
replacement and canceling the stored task when the view disappears. Preserve the
existing SessionEntryResumeCoordinator(tabManager:).focusIfActive(entry)
operation while preventing it from continuing after the sidebar lifecycle ends.
In `@Sources/TerminalController`+VaultCommands.swift:
- Line 216: In the vault.fork --open flow, replace the untracked Task wrapping
SessionEntryResumeCoordinator.resume(forked) with a direct await of the async
resume call, using the existing async v2VaultFork path rather than the
synchronous v2MainSync bridge, so the opened result is reported only after
resume decides whether a workspace was launched.
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.github/workflows/ci.ymlCLI/CMUXCLI+CodexWriterRestore.swiftCLI/CMUXCLI+Restore.swiftCLI/CMUXCLI+RestoreExecution.swiftCLI/CMUXCLI+RestoreLaunchPayload.swiftPackages/macOS/CMUXAgentLaunch/README.mdPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/AgentRestoreInvocation.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/AgentRestorePlanner.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/CodexLegacyRestoreCommand.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/CodexWriterLockInspection.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/CodexWriterLockInspector.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/CodexWriterOwner.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/CodexWriterOwnerScan.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/CodexWriterProcessInspector.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/CodexWriterRestoreInspection.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/CodexWriterRestorePreflight.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/CodexWriterSurfaceIdentity.swiftPackages/macOS/CMUXAgentLaunch/Tests/CMUXAgentLaunchTests/CodexWriterLockInspectionTests.swiftPackages/macOS/CMUXAgentLaunch/Tests/CMUXAgentLaunchTests/CodexWriterRestorePreflightTests.swiftResources/Localizable.xcstringsSources/CodexWriterRestoreMessage.swiftSources/ContentView.swiftSources/RightSidebarPanelView.swiftSources/RightSidebarToolPanel.swiftSources/SessionEntry.swiftSources/SessionEntryCodexHome.swiftSources/SessionEntryResumeCoordinator+CodexWriter.swiftSources/SessionEntryResumeCoordinator.swiftSources/SessionEntryResumeLaunch.swiftSources/SessionIndexModels.swiftSources/SessionIndexStore+CodexSQL.swiftSources/SessionIndexStore.swiftSources/SessionIndexView.swiftSources/TerminalController+VaultCommands.swiftcmux.xcodeproj/project.pbxprojcmuxTests/SessionEntryResumeCoordinatorTests.swiftcmuxTests/SessionEntryResumeLaunchTests.swifttests/fixtures/codex_writer_restore/Harness.swifttests/test_codex_writer_restore.py
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Actionable comments posted: 7
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Inline comments:
In `@CLI/CMUXCLI`+CodexWriterRestore.swift:
- Around line 42-43: Update restoreRecord’s legacy Codex flow to normalize and
validate mode and kind before execution, rejecting values with surrounding
whitespace or otherwise noncanonical forms. Ensure any record rejected by
guardLegacyCodexWriter does not proceed to execLegacyRestoreCommand, preserving
guardCodexWriterBeforeRestore’s single-writer protection.
In `@Sources/ContentView.swift`:
- Around line 2409-2413: Update resumeSession and openSession to store their
asynchronous Task handles in view-owned state, cancel any existing session
launch task before starting another, and cancel the stored task when the owning
view lifecycle ends. Preserve the existing SessionEntryResumeCoordinator calls
while ensuring cancellation can reach its preflight and UI mutation work.
In `@Sources/RightSidebarPanelView.swift`:
- Around line 493-495: Update RightSidebarPanelView’s onFocus handling to store
the launched focus Task, cancel any existing task before starting a replacement,
and cancel the stored task from the view’s onDisappear lifecycle handler so
stale focus or alert actions cannot continue after the session context changes.
In `@Sources/RightSidebarToolPanel.swift`:
- Around line 291-298: Update RightSidebarToolPanelView’s resume, open, and
focus action handling to store the created Task, cancel any existing action
before starting a new one, and cancel the stored task in close() and deinit.
Preserve SessionEntryResumeCoordinator’s existing cancellation checks and action
behavior.
In `@Sources/SessionEntry.swift`:
- Line 36: Update forkedEntry to pass the existing indexedCodexHome value when
constructing the derived SessionEntry, rather than relying on the initializer’s
nil default. Preserve this value through v2VaultFork so codexHomeForResume can
recover the owning home for symlinked transcripts.
In `@Sources/SessionEntryResumeCoordinator`+CodexWriter.swift:
- Around line 78-80: Update the Dock candidate filtering in the panel loop to
exclude remote terminal panels by requiring
!dock.terminalLinkIsRemoteTerminal(panelID) before appending a candidate.
Preserve the existing TerminalPanel, live-surface, foreground-process, and TTY
checks.
In `@Sources/TerminalController`+VaultCommands.swift:
- Around line 213-219: Update the vault.fork handler around v2MainSync and
SessionEntryResumeCoordinator.resume so opened reflects the actual
workspace-launch outcome rather than merely successful Task scheduling. Await or
otherwise propagate a result-bearing MainActor resume operation, preserving
false or a pending/failure result when resume cannot call launchInNewWorkspace,
including the active-writer-without-unique-surface case.
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.github/workflows/ci.ymlCLI/CMUXCLI+CodexWriterRestore.swiftCLI/CMUXCLI+Restore.swiftCLI/CMUXCLI+RestoreExecution.swiftCLI/CMUXCLI+RestoreLaunchPayload.swiftPackages/macOS/CMUXAgentLaunch/README.mdPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/AgentRestoreInvocation.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/AgentRestorePlanner.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/CodexLegacyRestoreCommand.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/CodexWriterLockInspection.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/CodexWriterLockInspector.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/CodexWriterOwner.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/CodexWriterOwnerScan.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/CodexWriterProcessInspector.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/CodexWriterRestoreInspection.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/CodexWriterRestorePreflight.swiftPackages/macOS/CMUXAgentLaunch/Sources/CMUXAgentLaunch/CodexWriterSurfaceIdentity.swiftPackages/macOS/CMUXAgentLaunch/Tests/CMUXAgentLaunchTests/CodexWriterLockInspectionTests.swiftPackages/macOS/CMUXAgentLaunch/Tests/CMUXAgentLaunchTests/CodexWriterRestorePreflightTests.swiftResources/Localizable.xcstringsSources/CodexWriterRestoreMessage.swiftSources/ContentView.swiftSources/RightSidebarPanelView.swiftSources/RightSidebarToolPanel.swiftSources/SessionEntry.swiftSources/SessionEntryCodexHome.swiftSources/SessionEntryResumeCoordinator+CodexWriter.swiftSources/SessionEntryResumeCoordinator.swiftSources/SessionEntryResumeLaunch.swiftSources/SessionIndexModels.swiftSources/SessionIndexStore+CodexSQL.swiftSources/SessionIndexStore.swiftSources/SessionIndexView.swiftSources/TerminalController+VaultCommands.swiftcmux.xcodeproj/project.pbxprojcmuxTests/SessionEntryResumeCoordinatorTests.swiftcmuxTests/SessionEntryResumeLaunchTests.swifttests/fixtures/codex_writer_restore/Harness.swifttests/test_codex_writer_restore.py
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Summary
Closes #11973.
Codex correctly rejects a second writer; cmux was launching one anyway. The shared restore/Vault preflight now probes the exact account's kernel writer lock rather than file existence, persisted snapshots, or tty labels.
Concrete regression evidence
Regression tests precede the implementation in separate commits: a8c534a (Vault home) and 9f91eeb (production CLI execution harness); implementation begins at 0997fb1.
CMUX_RESTORE_SOURCE_REF=a8c534a39 arch -arm64 python3 tests/test_codex_writer_restore.pyexecuted the base production planner/exec code: 4 behavioral failures / 6 tests, including a held lock incorrectly reaching the fake agent's exec. The identical harness on the fix: 6/6 passed. Every home, lock, and agent is a disposable fixture; no app or real Codex session is used. CI now runs this harness.arch -arm64 swift test --package-path Packages/macOS/CMUXAgentLaunch: 373 tests / 50 suites passed before main sync. The focused ownership suite after sync: 15 tests passed, including active/available/released locks, release during discovery, missing/invalid/symlink paths, account isolation, relative homes, remote option parsing, unknown/ambiguous owners, runtime TTY matching, and PID birth generation.The final current-HEAD full package run passed 384 tests / 51 suites. Project normalization, app test wiring (779 files after main sync), Package.resolved policy, workspace grouping, Swift syntax parse, and diff whitespace checks passed. Seven new UI/CLI keys were audited in English/Japanese, including matching format placeholders. No new Swift warnings; warning budget unchanged.
The earlier hosted test-first run 33921594326 failed in unrelated pre-existing CmuxTuiSurfaceProviderTests compilation before executing tests; it is not used as regression proof.
Scoped trade-offs and limitations
Closeout is currently blocked, not review-clean: three attempts of the canonical autoreview helper (Codex
gpt-5.6-sol, high) failed with HTTP 503 because the selected account's refresh token is reused/invalidated and requires reauthentication. All three merge-conflict gates passed. No review-engine switch or gate bypass was used.Hosted workflow-guard-tests also fails its test-determinism gate on the unchanged
cmuxTests/MobileHostConnectionLifecycleTests.swift:236sleep introduced by main's #11874. This blocks downstream app validation. That unrelated mobile test and the determinism allowlist have not been changed by this PR. CI/review closeout remains queued after those external blockers are resolved..github/swift-file-length-budget.tsvandscripts/swift_file_length_budget.pyare absent from both the task base and current main; the prescribed command was attempted and reports ENOENT. No budgets were regenerated or warning allowances changed.Build command for the later authorized dogfood step:
Summary by CodeRabbit
New Features
Bug Fixes
Tests
Note
Medium Risk
Changes agent restore and Vault session launch paths with kernel/process inspection; mistakes could block legitimate resumes or mis-route focus, but the design fails closed and does not delete locks or kill processes.
Overview
Adds a shared Codex writer preflight in
CMUXAgentLaunchthat probes each thread’s kernelflockunder the effectiveCODEX_HOME(from final argv, child env, and cwd), optionally discovers a single live holder, and blocks restore when a writer is active or ownership cannot be verified safely. Remote--remotelaunches skip local lock checks; legacy shell-only resumes are parsed only when they expose a literal absoluteCODEX_HOME.CLI:
cmux restoreruns the guard before binding claims and again at exec, with fail-closed errors and new localized copy.AgentRestorePlannertags Codex resume invocations withcodexResumeSessionIDand pins verification home into the child account.Vault: Session index entries carry
indexedCodexHome; resume/open/focus go through an asyncSessionEntryResumeCoordinatorthat either focuses one unambiguous live terminal (lock inode, PID generation, TTY, runtime ancestry) or shows a warning instead of starting another writer. UI session actions use cancellable main-actor tasks.CI adds
tests/test_codex_writer_restore.py; package and coordinator tests cover locks, legacy command scope, and resume behavior.Reviewed by Cursor Bugbot for commit aae764b. Bugbot is set up for automated code reviews on this repo. Configure here.