I Let Claude Code Write 10 Features Without Reading Any Diffs. Here's What Broke.

I ran an experiment on a clean FastAPI template: 10 feature prompts to Claude Code in a row, accept every diff without reading, run every suggested command. No code review, no test runs in between. 33 minutes later: Test coverage: 90% → 0% Lines added: +607 across 15 files The code literally cannot import Here's the full breakdown, because I think most "AI coding killed my codebase" posts are vibes. This one is numbers. The setup I started with tiangolo/full-stack-fastapi-template.