Carbon automates repository versioning, changelog orchestration, and README badge synchronization across Crystal projects.

Highlights:

• Commit-Based Version Sync: Single source of truth aligning shard.yml, version.cr, and Git tags with monotonic commit counts (carbon bump, carbon sync).
• YAML Changelog Compiler: Structured changelog.yml compiled to GitHub-hyperlinked CHANGELOG.md with semantic category bucketing.
• README Badge Engine: Auto-discovers CI workflows, licenses, Crystal constraints, and releases to render dynamic Markdown badges (<!-- carbon:badges -->) via badges.yml.
• Non-Destructive Git Hooks: Safely chains into pre-commit and post-merge hooks using isolated markers without overwriting existing lint scripts.
• Repository Doctor: Audits shard health, detects version divergence, and auto-repairs metadata (carbon doctor --fix).