Append a verbatim entry to a personal, per-repo, gitignored devlog (DEVLOG.md), and seed talking-point nudges from recent git/PR activity and unresolved threads in the previous entry. Use when the user says "create devlog", "devlog", "add a devlog", "dev log entry", "log this", "/create-devlog", or wants to record what they are working on / rant about progress. The user usually dictates via speech-to-text, so the log is recorded WORD-FOR-WORD with only obvious typo and speech-to-text fixes, never summarized, reworded, or analyzed.