react-magma

Prepare, audit, dry-run, and complete React Magma stable releases for the v5 (`dev` to `main`) or v4 (`v4/dev` to `v4/main`) tracks. Use when Codex is asked to compare fixes across v5 and v4, identify backport or forward-port candidates, open or review a release branch, reconcile Changesets prerelease state, predict package versions and changelogs, fix release lockfiles, validate publishing readiness, or synchronize stable branches back into their development branches after release.