chore(release): prepare 0.58.0

[elkaix]

Summary

• Bump version 0.57.0 -> 0.58.0 across pyproject.toml, uv.lock, README.md, docs, and installer references.
• Consume Unreleased into a new 0.58.0 (2026-07-11) CHANGELOG section covering defensive agent-spec loading, clean terminal rendering for thinking/subagent activity, and the agent-core deepening effort (observable request assembly, transactional conversation history, source-aware agent/skill catalogues, deterministic tool/MCP lifecycle fault coverage, and hardened seams from review); mirrored into docs/en/release-notes/changelog.md via npm run sync.
• Add a 0.58.0 entry to docs/en/release-notes/breaking-changes.md (no breaking changes; compatible with 0.57.0 user config, native installs, and session data).

Test plan

• .venv/bin/python scripts/check_version_tag.py --pyproject pyproject.toml --expected-version 0.58.0
• README/CHANGELOG version-string greps
• .venv/bin/python scripts/check_pythinker_dependency_versions.py ... (all workspace pyprojects)
• .venv/bin/python -m pytest tests/test_installation_docs.py tests/test_homebrew_formula.py -q (17 passed)
• git grep -nF "0.57.0" — only historical CHANGELOG entries remain
• make check-pythinker-code (ruff + pyright + ty, all green)
• make test-pythinker-code (tests + tests_e2e, all passing)
• make build-web build-dashboard locally so the dev-installed CLI's bundled UI isn't stale

Summary by CodeRabbit

• Documentation
  • Updated release information to version 0.58.0.
  • Added upgrade guidance using the update command, package installation, or the native installer.
  • Refreshed Windows, Linux, Debian/Ubuntu, Fedora/RHEL, and openSUSE installation instructions.
  • Updated download links, package filenames, checksums, and verification instructions for 0.58.0.
  • Updated local Linux package build instructions and documented artifacts.
• Release
  • Published the 0.58.0 changelog with highlights covering agent behavior, terminal rendering, compatibility, discovery, and conversation handling improvements.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro

Run ID: 4790c03a-3421-4b51-8acd-301f1f8ef89a

📥 Commits

Reviewing files that changed from the base of the PR and between bb9885f and 7d03ce9.

⛔ Files ignored due to path filters (4)

• docs/en/guides/getting-started.md is excluded by !docs/**
• docs/en/release-notes/breaking-changes.md is excluded by !docs/**
• docs/en/release-notes/changelog.md is excluded by !docs/**
• uv.lock is excluded by !**/*.lock

📒 Files selected for processing (4)

• CHANGELOG.md
• README.md
• packages/linux-installer/README.md
• pyproject.toml

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📝 Walkthrough

Walkthrough

The project release version is bumped from 0.57.0 to 0.58.0. Changelog, README, and Linux installer documentation now use the new release number in highlights, installation commands, package filenames, download URLs, and checksum references.

Changes

Release 0.58.0

Layer / File(s)	Summary
Release metadata and changelog pyproject.toml, CHANGELOG.md	The project version and changelog release entry are updated to 0.58.0, including upgrade instructions.
README release references README.md	Release highlights, Windows installers, Linux packages, installation commands, and checksum references are updated to 0.58.0.
Linux installer documentation packages/linux-installer/README.md	Linux package URLs, checksum commands, build commands, and documented artifacts are updated to 0.58.0.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Possibly related PRs

• Pythoughts-labs/pythinker-code#197: Coordinates the same release-version references across project metadata and documentation.
• Pythoughts-labs/pythinker-code#193: Updates the same installation, checksum, changelog, and package version surfaces.
• Pythoughts-labs/pythinker-code#59: Performs a similar release version bump across the same documentation and metadata files.

Suggested labels: dependencies

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	Uses a valid conventional-commit format and clearly matches the release-prep changes.
Description check	✅ Passed	Covers summary, test plan, and checklist well; the explicit related-issue section is still missing.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch release/0.58.0

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_{Comment @coderabbitai help to get the list of available commands.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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