chore(release): prepare 0.39.0

[elkaix]

Summary

• Bump version to 0.39.0 in pyproject.toml and uv.lock
• Cut 0.39.0 (2026-06-09) CHANGELOG block from Unreleased (8 bullets), reset Unreleased to empty
• Add 0.39.0 no-breaking-changes entry to breaking-changes.md
• Sync all 8 bullets into docs/en/release-notes/changelog.md (4 were missing from the docs mirror)
• Bump all release-asset filenames and download URLs from 0.38.0 → 0.39.0 in README, getting-started, and linux-installer docs

Highlights: Catppuccin TUI theme, Homebrew updater fix, friendlier 429 messages + ChatGPT account switching, agent phase-0 tools (Recall, MCP resources, project mcp.json, cost roll-up), agent MCP server management, read-only profile hardening, and security dependency remediations (asyncssh 2.23.0, starlette 1.2.1, vitest ^3.2.6).

Test plan

• check_version_tag.py passes (verified locally)
• check_pythinker_dependency_versions.py passes (verified locally)
• tests/test_installation_docs.py + tests/test_homebrew_formula.py pass (17 passed locally)
• README What's New in 0.39.0 heading and upgrade snippet present
• CHANGELOG ## 0.39.0 block present, Unreleased empty
• CI required checks green before merge

Summary by CodeRabbit

• Documentation

  • Updated release notes and changelog to document version 0.39.0 features and improvements.
  • Updated installation guides and quick-start instructions with 0.39.0 artifact references.
  • Added 0.39.0 entry to breaking changes documentation confirming backward compatibility.

• Chores

  • Bumped project version to 0.39.0.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: d8437f08-530c-4a3e-923b-4a9ce1517766

📥 Commits

Reviewing files that changed from the base of the PR and between 8de62a8 and 9bc236c.

⛔ Files ignored due to path filters (1)

• uv.lock is excluded by !**/*.lock

📒 Files selected for processing (7)

• CHANGELOG.md
• README.md
• docs/en/guides/getting-started.md
• docs/en/release-notes/breaking-changes.md
• docs/en/release-notes/changelog.md
• packages/linux-installer/README.md
• pyproject.toml

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📝 Walkthrough

Walkthrough

Project version bumped from 0.38.0 to 0.39.0. Release notes and changelogs moved Unreleased entries into a dated 0.39.0 section with enhanced feature descriptions. All public installation guides, artifact links, and version references across README, getting-started, and linux-installer documentation updated to point to 0.39.0 installers and checksums.

Changes

Version 0.39.0 Release Documentation

Layer / File(s)	Summary
Version declaration and release notes pyproject.toml, CHANGELOG.md, docs/en/release-notes/changelog.md, docs/en/release-notes/breaking-changes.md	Version bumped to 0.39.0 in project metadata. Unreleased changelog entries promoted to dated 0.39.0 (2026-06-09) release section with expanded feature/fix details (TUI theme, Homebrew updater, login/429 handling, agent phase-0, asyncio warnings, profile guard hardening, MCP server workflow, dependency remediation). Breaking-changes doc confirms no compatibility issues with 0.38.0.
Installation guides and artifact references README.md, docs/en/guides/getting-started.md, packages/linux-installer/README.md	README "What's New" updated to 0.39.0 features and upgrade instructions. Windows native installer filenames changed to PythinkerSetup-0.39.0.exe across Recommended install, manual download, and per-machine install instructions. Linux Debian/Ubuntu and Fedora/RHEL/openSUSE .deb/.rpm download URLs, filenames, and .sha256 verification commands updated to 0.39.0. Getting-started guide Windows manual download link bumped to 0.39.0. Linux-installer build documentation and artifact naming examples updated to reference 0.39.0 build output and tarball.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• Pythoughts-labs/pythinker-code#74: Release-prep version bump with identical pattern across pyproject.toml, CHANGELOG.md, README.md, and installer documentation.
• Pythoughts-labs/pythinker-code#63: Release-automation update promoting Unreleased section into dated release entry with version propagation into all docs and installer references.
• Pythoughts-labs/pythinker-code#76: Release chore bumping version across pyproject.toml, changelogs, README, guides, and linux-installer docs with artifact link updates.

Suggested labels

documentation

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	PR title follows conventional commits format (chore(release): prepare 0.39.0) and accurately describes the release preparation work.
Description check	✅ Passed	PR description includes summary, test plan, and highlights; however, it lacks the 'Related Issue' section and doesn't explicitly confirm completion of all checklist items.
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.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch release/0.39.0

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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