feat/47-G-join11
master
Builds: design 47 G, lead answer A-338, ADR 0233 Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h
No version is published for it (builder_versions answers none), so §583 gives 0.1. Builds: design 47 G A-335, §583 Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h