Feature Matrix

"Every project accumulates features over time, but nobody maintains the map. The README lists what the project does today, git log shows what changed, and GitHub issues show what was planned — but nothing shows the full picture: what was built, when, why, and which issues drove it.

I needed a skill that could walk into any repo, reconstruct the feature timeline from commits and issues, and produce a single living document that maps every deliverable to its RFC and status — then keep it current as new work ships."

— John Efemer, creator of AI Coach

When to Use

• Onboarding onto an existing project and need to understand what has been built
• Creating a feature inventory for stakeholder reporting or roadmap planning
• Auditing what was shipped vs. what was planned
• Generating a living document that maps features to deliverables and stories
• Preparing for a product review, retrospective, or architecture decision record
• After shipping new features — incrementally updating the matrix
• Running /build-feature-matrix or /update-feature-matrix slash commands

Slash Commands