The bus module's spend record must not be writable by the tool runner. A state declared read-only gets read on
the module's own account and the tool runner carrying it (direct get, a watch's consumer) and no publish on its
$KV subjects; the process whose bus state names it writes it. The judge rule and the manifest field follow
with mesh-sdk's read-only.
Claude-Session: https://claude.ai/code/session_01JG73KJNrH5EgFXMKKYSrig
ADR 0593 §6, §7: the grants part creates composed-<node> per node, grants each engine the writes of its
own bucket and a direct get of the indexer's candidates for compose-candidate, and grants
mesh-host.composed read-only, with the stream listing and creation advisory a per-node read needs, to
the provisioner, the assigner and the view alone; memberships issue it per node.
Claude-Session: https://claude.ai/code/session_01NcbgfJ9Gum47zkFKWRaovL
ADR 0593 §1: buscompose's engine moves from mesh-sdk into mesh-grants/internal/buscompose, its golden
user lists unchanged; the controller's raise and assert code is left behind, and the merged switch
test runs inside the part's whole integration test.
Claude-Session: https://claude.ai/code/session_01NcbgfJ9Gum47zkFKWRaovL
jschoubben