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kevinveenbirkenbachandClaude Opus 4.8
56f0364414
The per-round swarm purge ran `docker volume prune -f`, which on Docker 23+ removes only anonymous volumes. A named DB volume such as mariadb_data survives `docker stack rm`, so the next round booted the prior round's database, whose root password no longer matched the freshly regenerated credentials, and mariadb failed with "Access denied for root". Use `docker volume prune -a -f` so named unused volumes are wiped too and each round re-initialises from clean state. Swarm-test-harness only; never runs in compose. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>