Builds: design 47 G §22, §338 (accepted kinds step, runner alone; run, node-build-go,
callers the runner, the indexer, the assigner and the checker), §326, §414 (state
detected-steps, one key per artifact, apart from today's step keys steps).
Not built: §415's kind names check.step, check.run, delivery.step (the definition
reader refuses a dotted accepted-kind name); stopped on that question.
Claude-Session: https://claude.ai/code/session_01JG73KEq4zoDfM9WtYpcQgZ