What Building a Geopolitical Simulation Taught Me About Claude Code

The most valuable features weren't the ones that wrote code for me. I was 45 minutes into a Sprint 2 session when the test runner caught something I'd completely missed. I'd just saved a React component file — nothing dramatic, a minor prop change — and two seconds later, a notification appeared in my terminal: FAIL tests/components/game/EscalationLadder.test.tsx ✗ renders correct rung label for rung 4 Expected: "Conventional Strike" Received: "Conventional strike" The PostToolUse hook had fired