docs/cli/reference.md had drifted from the code in the usethis show section: usethis show license was absent from the subcommand list, --output-file was documented only under sonarqube despite applying to all four show subcommands, and --project-key was undocumented.

Changes

docs/cli/reference.md

• Add usethis show license to the subcommand inventory
• Promote --output-file to the parent usethis show section (shared by all subcommands)
• Document --project-key in the usethis show sonarqube subsection as its only command-specific option

usethis-cli-modify skill (v1.4 → v1.5)

• Add explicit guidance to cross-check every option parameter in modified command signatures against the reference docs — shared options (defined once, reused across commands) are the most common miss
• Reference the new usethis-qa-doc-integrity skill for systematic audits

New usethis-qa-doc-integrity skill (v1.0)

• Procedure for auditing CLI doc coverage: compare _ui/interface/ signatures against docs/cli/reference.md
• Calls out the three gap categories: missing options, missing subcommands, stale entries
• Documents when shared options may be documented at group level vs. per-subcommand