Splits codeSpans, the flag and subcommand walk, the export walker and the
docs-impact entry point into small functions so fallow's audit passes, adds
scripts/cli-command-tree.test.ts (cli.ts's loader block and a citty command
described end to end), and lists docs-impact.yml among the workflows that read
the PR body on an edit.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>