chore(release): prepare 0.49.0

[elkaix]

Prepares the 0.49.0 release (0.48.0 → 0.49.0).

What's in this release

• Reduction ladder in the default agent prompt. The agent walks an explicit, ordered ladder
  (does this need to exist → standard library → native platform/framework feature → already-installed
  dependency → one line → minimum custom code) before writing code, mirrored into /best-practices;
  validation, error handling, security, and accessibility are never traded away.
• New cleanup-audit skill. A read-only, whole-repo over-engineering audit — the repo-wide
  complement to the diff-scoped pythinker review diff --mode deslopify.
• Fix: duplicate update notices at startup (the hint renders once on the under-input line, no toast).

Mechanical bump (8 files, matching the 0.48.0 release scope)

pyproject.toml, uv.lock (pythinker-code block), CHANGELOG.md, docs/en/release-notes/changelog.md
(regenerated via npm run sync), docs/en/release-notes/breaking-changes.md, README.md,
docs/en/guides/getting-started.md, packages/linux-installer/README.md.

Local gates (all green)

• check_version_tag.py --expected-version 0.49.0 ✓
• README What's New in 0.49.0 + pythinker-code==0.49.0 ✓
• ## 0.49.0 ( heading in CHANGELOG ✓
• check_pythinker_dependency_versions.py (all workspace packages) ✓
• tests/test_installation_docs.py tests/test_homebrew_formula.py → 17 passed ✓
• No stray 0.48.0 outside historical changelog entries / lockfile react-refresh ✓

Tag v0.49.0 will be pushed against the squash-merged commit to trigger the publish workflow.

Summary by CodeRabbit

• New Features
  • Reduction ladder guidance: New code-writing guidance for the agent prompt to help navigate optimization decisions with explicit upgrade paths, balancing deliberate shortcuts with full implementations
  • cleanup-audit skill: Read-only analysis tool that scans your entire codebase to identify over-engineering patterns without applying fixes

[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: cafa88e0-3050-4644-8225-6c41fa548df2

📥 Commits

Reviewing files that changed from the base of the PR and between 39c8f79 and 50d14b5.

⛔ 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

Bumps the project from 0.48.0 to 0.49.0: version field in pyproject.toml, all Windows and Linux installer artifact references in both README.md files, and a new 0.49.0 changelog section with expanded descriptions of the reduction ladder prompt guidance and the new cleanup-audit skill.

Changes

0.49.0 Release Prep

Layer / File(s)	Summary
Version bump and release notes pyproject.toml, CHANGELOG.md, README.md	pyproject.toml version incremented to 0.49.0; CHANGELOG.md gains the 0.49.0 release header with expanded entries for the reduction ladder and cleanup-audit skill; README.md What's New section updated to 0.49.0.
Installer artifact references README.md, packages/linux-installer/README.md	All versioned filenames bumped from 0.48.0 to 0.49.0: Windows .exe install table and snippets, Linux .deb/.rpm download URLs, SHA-256 checksum commands, build.sh invocation, and dist/ output filenames.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• Pythoughts-labs/pythinker-code#147: Same release-prep pattern updating pyproject.toml, README.md, packages/linux-installer/README.md, and CHANGELOG.md with a version bump.
• Pythoughts-labs/pythinker-code#156: Identical set of files updated (version metadata, docs, installer instructions) for a prior release bump.
• Pythoughts-labs/pythinker-code#163: Direct predecessor release chore updating the same version identifiers and bundled README/changelog/installer artifact filenames.

Suggested labels

dependencies

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title follows conventional commits format with type 'chore', scope 'release', and clearly describes the 0.49.0 version preparation.
Description check	✅ Passed	The description includes related context, feature details, mechanical updates, and local validation results, though it lacks the structured template sections like formal issue link and checklist.
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/0.49.0

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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