Update the user's brag document — Julia Evans' running record of what they did and why it mattered. The user forgets what they built; the repo remembers, so read it.

Run from the repo whose work it records: the repo is the evidence. The brag document sits in the directory you were invoked from. When it isn't there, ask the user for its directory; if that directory holds none, start one there.

Resolve the tracker and the user's identity per references/issue-tracker.md.

Find the work

Read what the brag document already records, then take whichever branch you were invoked with:

No argument — walk the user's history in this repo (their commits, merged change requests, closed issues, reviews) and keep everything the brag document has not recorded yet. Group it into projects and show the list; the user confirms what to record.
Work named in the argument — record only that work. Find it in the repo.

For each piece of work, read its commits and diff, the issue behind it, its change request, and its issue workspace (PLAN.md, CONTEXT.md) when one exists per references/issue-workspace.md. Then ask the user only for what the repo cannot show — why it mattered, who it served, and the impact they saw, numeric or not (an audit passed, a user retained).

Record it

Write into the brag document, exactly as good as it is. Follow its existing shape; start a new one with the sections below. File each piece of work under the section it belongs to, and update entries in place — fold work into its project's existing entry, fill in impact marked pending.