The look arms a key of the state bounds with its own time to live; the bus's marker of its end raises call-unanswered about the build key while it is still building and no look holds it, naming builder_build_again; the key's next written end deletes the bound and clears the finding. A bound that cannot be written raises at once. No timer. Claude-Session: https://claude.ai/code/session_01JG73KEq4zoDfM9WtYpcQgZ