The 2026-05-26 migration flipped the keel default force->patch and dropped
match-tag from the inject-keel-annotations patch, but Kyverno's add-only
mutate can't remove an annotation that's no longer listed -- 194 workloads
kept a stale keel.sh/match-tag=true. Under it Keel cross-assigned images in
multi-image pods: the blog's nginx<->nginx-exporter images were swapped and
the site was down 2026-05-26 -> 06-01 (nginx received the exporter's
-nginx.scrape-uri arg and CrashLoopBackOff'd); changedetection was silently
swapped (app lost its /datastore PVC + env, ran ephemeral for days).
- policy now sets keel.sh/match-tag=null (strips on admission, never re-added)
- swept the annotation off all 194 existing workloads (kubectl, no pod restart)
- AGENTS.md: documents the strip; post-mortem added
blog + changedetection un-swapped via kubectl set image (TF-ignored images);
both 2/2 and serving 200. Policy already applied via scripts/tg (Tier-1 PG
state authoritative). [ci skip]
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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