A proposal sets a module's watched branch and build (a re-place keeps them), the changes digest an ask binds to
carries both, and a placement's build is a held put of that build, released when the placement drops it while a
person's put stays. Taken over from 6bc6fe53 and b8e50fff.
Builds: design 47 G §14, §78, §114, §360, §361
Tests: TestAssignments (place change branch, build, digest rows), aPlacementsBuildIsPut. Test 77 (§79) covered by the put row.
Claude-Session: https://claude.ai/code/session_01JG73KEq4zoDfM9WtYpcQgZ