The builder says wait-held for a key queued behind a package, the package as its part and on (package:<ref>), on its
stream waits, and wait-ended published once the key is claimed; a toolchain wait never ends by that, and a package wait
never by a toolchain's end. Files: internal/build/waits.go (Package, On, WaitPublished), internal/build/run.go (Hold at
the queued result, End at the claim), cmd/mesh-delivery-builder/waits.go (Part in the body, the End rule).
Builds: design 47 G A-192, §499
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h
jschoubben
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