Drops the additive-union semantics that resurrected deliberate deletions
across the fleet (see feedback_memory_sync_destructive_ok.md and the
2026-06-01 consolidation that came back the next morning).
New behavior:
* file in REPO, not in PROFILE -> copy REPO -> PROFILE (unchanged)
* file in PROFILE, not in REPO -> DELETE from PROFILE (was: copy back)
* file in BOTH, identical -> no-op
* file in BOTH, differ -> overwrite PROFILE (was: log conflict)
Safety: aborts if the repo has <5 .md files (guards against a broken
repo wiping the profile store).
Test plan verified on GURU-BEAST-ROG:
* dry-run + apply matched (2 copies + 10 overwrites + 0 deletes)
* idempotent re-run = 79 identical, 0 ops
* self-check memory category PASS
* git status .claude/memory/ clean (script touched profile only)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Mike Swanson
ae51988557