buildrun leaves mesh-sdk for the builder's own Go module (ADR 0593 §1); the checker, assigner, indexer and watchman require it by a replace to the sibling directory. Issue 1930's bound was already on mesh-sdk's main and moves with it. The builder copies the imports a build module answers to the done key and the log's end entry, where the indexer keeps them (§2; D7). Claude-Session: https://claude.ai/code/session_01NcbgfJ9Gum47zkFKWRaovL