A Feature I Never Planned Emerged From Persona Interviews — Here's Exactly How

The Feature That Wasn't in the Design Doc When I started building BJJ Techniques — a BJJ (Brazilian Jiu-Jitsu) technique learning app for iOS — I had a clear vision: a searchable database of techniques, organized by position and category, with step-by-step instructions and YouTube videos. The "Technique Tree" — a visual map showing how techniques connect and flow into each other — was not in that design doc. Not even close. It emerged entirely from persona interviews. Here's exactly how that happened, including the specific research I used to make those interviews actually work. About the App BJJ Techniques is an iOS app for learning Brazilian Jiu-Jitsu techniques systematically (available on the App Store). Key features: Technique Library — Search techniques by category: submissions, sweeps, guard passes, and more Technique Detail Pages — Overview, step-by-step breakdowns, YouTube videos, and related techniques in one place Technique Tree — Visualize how techniques connect from any st