buscalls.ChunkBytes (512 KiB), mesh/objects.put-chunk and get-chunk with the store named in each chunk, the digest and size
of a get checked, the capability word put-sessions required, and a bundle's refusal of a value over 8 MiB gone.
Builds: design 47 G §518, §345, §490, §620, A-21
Claude-Session: https://claude.ai/code/session_01JG73KEq4zoDfM9WtYpcQgZ
stdio.BusState asks the runtime one buscalls method on the bundle's own bus state; package busstate makes the object
store's put, get, list, delete and fill by the store's local name (A3's request 1, distribution's incoming). Its test
takes the place of one merged into its neighbour, so mesh-sdk's unit count does not grow.
Claude-Session: https://claude.ai/code/session_01JG73KJNrH5EgFXMKKYSrig
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