The watchman keeps the watched branch each open take-in wait names (take-in.pending's branch) and times a head only while its branch has none; once the revision is taken in the head is timed again from its own move. The head on a branch whose branch-unprotected stands (§497's second sentence) is not built: nothing the watchman hears says it (the forge bridge writes that finding, no event). Builds: design 47 G §12, §75, §497 Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h