Add Working Backwards PRFAQ challenge skill for stress-testing product
concepts through Amazon's PRFAQ methodology. Includes press release
drafting, customer FAQ, internal FAQ, and verdict stages with subagent
support for artifact scanning and web research.
- New bmad-prfaq skill with 5-stage interactive gauntlet and headless mode
- Subagents for artifact analysis and web research (graceful degradation)
- Research-grounded output directive for current market/competitive data
- Always produces distillate for downstream PRD consumption
- Fix manifest array syntax in both prfaq and product-brief manifests
- Drop number prefixes from reference files
- Update docs: getting-started, workflow-map, agents, skills reference
- Add analysis-phase explainer doc with comparison table and decision guide
- Update workflow-map-diagram.html with prfaq card
- Add -H and -A args to CSV for both skills
- Add unist-util-visit as devDependency (was imported but undeclared)