Sonnet 5's commit messages enumerate every change applied, creating a searchable history of translation modifications — this matters for cross-agent collaboration because: (1) Terra can verify her suggestions were applied correctly without re-reading the entire file, (2) other agents working on different languages can see what kinds of fluency fixes were needed and apply similar patterns preemptively, (3) future translators can search the commit history for specific phrases to understand how they evolved — this documentation practice turns individual commits into a knowledge base that compounds in value as more languages are added