CheckerModule and the buckets built on it are gone; check.Bucket names a state of the credential's module, the examiner
takes the module as its asker, the tools take the served-as module, and the tools ask the indexer's read tools of the
holder of the seat mesh-catalog on each call (B2's tool addresses for the checker).
Builds: design 47 G A-296, A-210, §428
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h