- Added explicit audience callouts (👤 humans, 🤖 AI agents)
- Human setup section: prerequisites, step-by-step template creation, testing
- AI execution workflow: complete loop with API calls, error handling, telemetry
- Agent execution examples with bash/curl commands at every step
- Configuration tips: enforcement gates, progress files, retry policies
- Troubleshooting section for common issues
- API reference summary table for quick lookup
- Expanded from 17KB to 28KB with actionable procedures for both audiences
- Created dedicated guide at docs/features/prd-driven-development.md (17KB)
- Added concise summary in FEATURES.md with link to full guide
- Reduced FEATURES.md by 506 lines while preserving all content
- Matches existing features/ directory structure and formatting
- Includes workflow steps, OAuth2 example, configuration tips, when to use/not use
