Release v0.64.1

[austinywang]

Summary

Patch release. Fixes sidebar workspace close (×) button intermittently failing to appear on hover (#3546).

Changelog

Fixed

• Fix sidebar workspace close (×) button intermittently failing to appear on hover (#3546)

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Note

Low Risk
Low risk patch-release bookkeeping only: updates the changelog and bumps Xcode project build/marketing versions, with no functional code changes in this PR.

Overview
Prepares the 0.64.1 patch release.

Updates CHANGELOG.md with the 0.64.1 entry (fixing the sidebar workspace close button hover issue) and bumps GhosttyTabs.xcodeproj MARKETING_VERSION to 0.64.1 and CURRENT_PROJECT_VERSION to 81 across build configurations.

^{Reviewed by Cursor Bugbot for commit 080a84d. Bugbot is set up for automated code reviews on this repo. Configure here.}

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Summary by cubic

Patch release v0.64.1 fixes the sidebar workspace close (×) button sometimes not appearing on hover.

^{Written for commit 080a84d. Summary will update on new commits.}

Summary by CodeRabbit

• Bug Fixes
  • Fixed an issue where the sidebar workspace close button would intermittently fail to appear on hover.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
cmux	Ready	Preview, Comment	May 5, 2026 0:11am
cmux-staging	Building	Preview, Comment	May 5, 2026 0:11am

[coderabbitai]

Caution

Review failed

Pull request was closed or merged during review

📝 Walkthrough

Walkthrough

This PR releases version 0.64.1 of the Ghostty/Cmux project. It adds a changelog entry documenting a fix for a sidebar workspace close button UI intermittency issue and bumps the project version across all Xcode build configurations from 0.64.0 to 0.64.1.

Changes

Release Version 0.64.1

Layer / File(s)	Summary
Changelog Documentation CHANGELOG.md	New release section 0.64.1 - 2026-05-05 added with a fixed item describing the sidebar workspace close button hover visibility fix.
Project Version Metadata GhosttyTabs.xcodeproj/project.pbxproj	CURRENT_PROJECT_VERSION bumped from 80 to 81 and MARKETING_VERSION bumped from 0.64.0 to 0.64.1 across all build configurations (GhosttyTabs Debug/Release, cmuxUITests Debug, CmuxDockTilePlugin Debug/Release, cmuxTests Debug/Release).

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• manaflow-ai/cmux#1430: Both modify CHANGELOG.md and bump MARKETING_VERSION/CURRENT_PROJECT_VERSION in the same Xcode project file.
• manaflow-ai/cmux#2624: Both update CHANGELOG.md with a new release entry and synchronize version bumps across identical build configurations.
• manaflow-ai/cmux#2310: Both perform identical release workflows—updating the changelog and version metadata in the Xcode project.

Poem

🐰 A tiny hop from point-six-oh,
Now point-six-one prepares to glow,
The close button's dance now smooth and bright,
Versions aligned, everything right! ✨

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Caution

Pre-merge checks failed

Please resolve all errors before merging. Addressing warnings is optional.

• Ignore

❌ Failed checks (1 error)

Check name	Status	Explanation	Resolution
Cmux Swift Logging	❌ Error	TerminalController.swift has 5 print() calls and KeyboardShortcutSettingsFileStore.swift has 10+ NSLog() calls in app/runtime code, violating swift-logging.md rules requiring unified logging system.	Replace print() and NSLog() with Logger instances using pattern: nonisolated private let logger = Logger(subsystem: Logging.subsystem, category: "ComponentName")

✅ Passed checks (12 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'Release v0.64.1' directly and clearly identifies the main change: a version bump to 0.64.1 for a patch release.
Description check	✅ Passed	The description includes a Summary section explaining the patch release purpose and the fixed issue with references. However, Testing and Demo Video sections are absent or incomplete, and the checklist is not filled out.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Cmux Swift Actor Isolation	✅ Passed	This PR is a version bump release with no Swift code changes. All modifications are additions of configuration and resource files. No production Swift code was introduced or modified.
Cmux Swift Blocking Runtime	✅ Passed	PR introduces only version metadata changes (CHANGELOG.md, project.pbxproj). No Swift code changes. The underlying fix uses non-blocking state machines and callbacks, not blocking primitives.
Cmux Swift Concurrency	✅ Passed	PR contains only non-code changes: CHANGELOG.md and Xcode project version metadata. No Swift source files are modified, so no concurrency patterns are introduced or expanded.
Cmux Swift @Concurrent	✅ Passed	PR contains no Swift source code changes - only CHANGELOG.md and project.pbxproj version updates. The @concurrent annotation check does not apply to configuration and documentation-only changes.
Cmux Swift File And Package Boundaries	✅ Passed	PR contains no Swift code changes—only CHANGELOG.md and Xcode project configuration updates. The custom check for Swift file/package boundaries is not applicable to non-code files.
Cmux Swiftui State Layout	✅ Passed	PR contains no Swift/SwiftUI code changes (only version bumps and changelog updates). The check for SwiftUI state layout violations is not applicable.
Cmux Architecture Rethink	✅ Passed	Sidebar hover fix via required AppKit NSMenu observers. Separates pointer from context lifecycle. No timing repairs.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch release/v0.64.1

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[greptile-apps]

Greptile Summary

This is a patch release (v0.64.1) that bumps the version identifiers in the Xcode project and updates the changelog. No production Swift source files were modified.

• CHANGELOG.md: New entry for v0.64.1 references the sidebar close button hover fix from PR Fix sidebar workspace close hover state #3546, with correct date and contributor credit.
• GhosttyTabs.xcodeproj/project.pbxproj: MARKETING_VERSION → 0.64.1 and CURRENT_PROJECT_VERSION → 81, applied consistently across all 7 build configurations (main app Debug/Release, UI tests, unit tests, dock tile plugin Debug/Release).

Confidence Score: 5/5

Safe to merge — the change is a mechanical version bump with no logic modifications.

Only two files change: the changelog and the Xcode project version strings. All 7 build configurations are updated consistently; there are no Swift source edits and no behavioral changes.

No files require special attention.

Important Files Changed

Filename	Overview
CHANGELOG.md	Adds v0.64.1 changelog entry documenting the sidebar workspace close button hover fix with correct date and contributor attribution.
GhosttyTabs.xcodeproj/project.pbxproj	Bumps MARKETING_VERSION from 0.64.0 to 0.64.1 and CURRENT_PROJECT_VERSION from 80 to 81 consistently across all 7 build configurations (Debug/Release for main app, UI tests, unit tests, and dock tile plugin).

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[PR #3549 – Release v0.64.1] --> B[CHANGELOG.md\nAdd v0.64.1 entry]
    A --> C[project.pbxproj\nVersion bump]
    C --> D[MARKETING_VERSION\n0.64.0 → 0.64.1]
    C --> E[CURRENT_PROJECT_VERSION\n80 → 81]
    E --> F[Main app Debug/Release]
    E --> G[UI Tests Debug/Release]
    E --> H[Unit Tests Debug/Release]
    E --> I[Dock Tile Plugin Debug/Release]

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_{Reviews (1): Last reviewed commit: "Bump version to 0.64.1" | Re-trigger Greptile}