The validation run's answer is read from the step's end through steprun's ReadOutput, whole or from the build seat's output object, and the indexer invokes seat:node-build-go.output for it (A-254); the patch B5g6 left for the join, applied on the merged heads. Builds: design 47 G §712, §713; lead answers A-254, A-268 Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h