Builds: design 47 G §15, §305 (a reader names a branch's source revision: SourceKey, the value SourceByBranchValue), §431 (the five verbs of release 6 leave the definition, so the list RemovedVerbs and its test go; the settle ask goes with the verb settle). Claude-Session: https://claude.ai/code/session_01JG73KEq4zoDfM9WtYpcQgZ