v0.1.0 Release Checklist

• Define initial semantic version as v0.1.0.
• Add changelog entry.
• Add release notes.
• Add cross-platform validation workflow.
• Confirm validation workflow passes on Linux, macOS, and Windows.
• Make tagged-source bootstrap reproducible so a script executed from a tagged checkout installs that same script rather than refreshing from main.
• Merge the release preparation changes to main.
• Create tag v0.1.0 from the verified release commit.
• Publish the GitHub Release using the version-controlled v0.1.0 release notes now retained at docs/releases/history/v0.1.0.md.