The prior commit only captured the file deletion (git add aborted on the
already-removed pathspec). This adds the actual content: the reworked §9
guardrail (justified ccci overlays OK; abra can't env start_period; always test
upgrade-to-latest, from-version custom tests skippable) and the new policy doc.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
