G's grants already carry a state's max-mib onto its bucket (Bucket.MaxBytes, §469); main's second copy of that cap in BucketStreamConfig and Composed is dropped for G's, and main's tests (the declared cap row, the held bucket raised) are kept. The checker keeps G's version 0.1 (§368) with main's compositions max-mib 256. Builds: design 47 G §469, §368; A-277 (since mesh-delivery #206 the grants part carries max-mib) Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h