feat: automated release workflow with auto-merge

[vreshch]

Summary

• Add release-prepare.yml workflow (manual trigger) that automates version bump, AI-generated changelog, and release PR creation
• Add auto_merge toggle — when enabled, uses gh pr merge --auto --squash to merge after CI passes
• Add release scripts: bump-version.js, generate-changelog.js (Claude API), update-changelog.js

How it works

workflow_dispatch (bump_type + auto_merge)
  → npm run verify
  → bump version in package.json
  → generate changelog via Claude API
  → update CHANGELOG.md
  → create release PR (release/vX.Y.Z → master)
  → if auto_merge: gh pr merge --auto --squash
  → on merge: existing publish.yml detects version change → npm publish

Usage

# Manual review
gh workflow run release-prepare.yml -f bump_type=patch -f auto_merge=false

# Fully automated
gh workflow run release-prepare.yml -f bump_type=patch -f auto_merge=true

Test plan

• Verify scripts run locally: node scripts/bump-version.js patch
• Trigger workflow manually from GitHub Actions UI
• Verify release PR is created with changelog
• Test auto-merge flow

[github-actions]

🎉 PR Validation ✅ PASSED

Commit: ae8fa5cb070c4533969e0c7f5047ec8ee8d8ed27
Branch: feature/release-prepare

Checks:

• ✅ Dependencies installed
• ✅ Type check passed
• ✅ Linting passed
• ✅ Format check passed
• ✅ Tests + coverage passed
• ✅ Build successful

Ready to merge! ✨

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⏰ Generated at: 2026-03-29T09:32:28.214Z