Validate a PRD against standards. Use when the user says "validate this PRD" or "run PRD validation"
$npx -y skills add fabb/wigai --skill bmad-validate-prdInstalls into the current project.
Run `npx skills use "https://github.com/fabb/wigai" --skill "fabb/wigai/bmad-validate-prd"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/fabb/wigai" that are relevant to the current task. Run `npx skills add "https://github.com/fabb/wigai"` and select the relevant skills, then follow their instructions.