chore(release): prepare 0.55.0

[elkaix]

Summary

• Releases the local-model reliability fixes from fix: local-model reliability — compaction hang, Qwen3 reasoning toggle, stuck-loop backstop #188 (compaction-hang cap, Qwen3 enable_thinking toggle, second stuck-loop backstop) as 0.55.0.
• Bumps pyproject.toml/uv.lock to 0.55.0, moves the Unreleased changelog entries into a dated ## 0.55.0 section (root + docs mirror), and adds a no-breaking-changes entry to breaking-changes.md.
• Updates README "What's New" and all version-pinned install/download examples (Windows installer, deb/rpm filenames and URLs) from 0.54.0 to 0.55.0.

Test plan

• scripts/check_version_tag.py confirms pyproject.toml matches 0.55.0
• README contains the What's New in 0.55.0 heading and pythinker-code==0.55.0 upgrade snippet
• CHANGELOG.md contains a ## 0.55.0 (...) heading
• scripts/check_pythinker_dependency_versions.py passes
• pytest tests/test_installation_docs.py tests/test_homebrew_formula.py — 17 passed
• git grep -nF "0.54.0" shows only historical changelog entries remaining
• make check-pythinker-code — ruff/format/pyright/ty all pass
• make test-pythinker-code (tests + tests_e2e) — all pass
• make build-web build-dashboard rebuilt so local UI bundles don't show a stale fallback version

Summary by CodeRabbit

• Bug Fixes

  • Improved reliability when using local models, including better handling of long context summaries, a stronger safeguard against repeated stuck tool calls, and more compatible behavior for certain self-hosted model endpoints.

• Documentation

  • Updated release notes and setup guides for version 0.55.0.
  • Refreshed Windows and Linux install instructions, download links, and package verification details to match the latest release.

[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: 7a0ee2a2-105b-4aac-b026-9736444a3e9a

📥 Commits

Reviewing files that changed from the base of the PR and between 840e9b9 and a1836f9.

⛔ 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

---

📝 Walkthrough

Walkthrough

This PR bumps the project version to 0.55.0 across pyproject.toml, consolidates CHANGELOG.md release notes into a single entry, and updates README.md and packages/linux-installer/README.md installer references, download URLs, and checksum filenames from 0.54.0 to 0.55.0.

Changes

Release 0.55.0 documentation and version bump

Layer / File(s)	Summary
Version bump and changelog entry pyproject.toml, CHANGELOG.md	Project version updated to 0.55.0; changelog entry consolidated into one bullet covering compaction summary cap, Qwen3.x enable_thinking toggle, and stuck-loop backstop.
README What's New section README.md	"What's New" section rewritten to describe 0.55.0 local-model reliability fixes.
Windows installer references README.md	Installer table, description, and manual install commands updated to PythinkerSetup-0.55.0.exe.
Linux installer package references README.md, packages/linux-installer/README.md	.deb/.rpm download URLs, SHA-256 checksum filenames, install commands, and build script/output artifacts updated to 0.55.0.

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

Suggested labels: dependencies

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title follows conventional commits and accurately describes the release prep.
Description check	✅ Passed	The description provides a clear summary and test plan for the 0.55.0 release.
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/0.55.0

---

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

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!