Documentation Updater

Update this project's documentation to accurately reflect the current state of the code. Delegates discovery to a scanner subagent and updates to a writer subagent, with user approval in between.

Argument Parsing

Parse $ARGUMENTS for an optional focus area:

• If $ARGUMENTS is empty, scan all documentation in the project.
• If $ARGUMENTS contains a focus area (e.g. "README", "api docs", "CLAUDE.md", "installation steps", "architecture"), scope the scan to that area. Pass the focus to the scanner subagent so it narrows its search.

Store the focus (or lack thereof) for use in the briefings below.