How to Stop Drowning New Contributors in Your Codebase

Every project hits this wall eventually. Someone new joins, or a non-technical stakeholder wants to understand how the system works, and you spend three hours on a Zoom call drawing boxes and arrows on a whiteboard. Then they ask the same questions next week. I've been on both sides of this. I've been the senior dev mumbling "well, it's complicated" while scrolling through a monorepo, and I've been the new hire staring at a src/ folder with 200 files wondering where anything actually starts. The real problem isn't that codebases are complex. It's that we have zero tooling for making them teachable. Why Traditional Documentation Fails Let's be honest about what usually happens with onboarding docs: Someone writes a CONTRIBUTING.md that's outdated within a month Architecture docs live in Notion and reference files that got renamed in Q2 README files explain how to install, not how to understand Inline comments explain what the code does, not why it's structured that way The root cause is