Agent Skills: ring:generating-release-guides

Generating an internal Operations-facing update/migration guide from the git diff between two refs, documenting per-change client impact, deploy ordering, monitoring, and rollback notes in English, pt-br, or both. Use when preparing a version release or recording what changed for the Ops team. Runs read-only by default and previews before writing. Skip with no git repo or a trivial single-file change.