Found an Agent created skill that applies uncle bobs Developer amazingang released 'old-coder', a markdown skill that makes coding agents prove their work by running code through a gauntlet of checks and producing a test plan (SPEC) before coding and an evidence report (EVIDENCE) after, so humans review documents instead of code. The skill, inspired by Robert C. Martin's strategy of not reading agent-written code, works with Claude Code, Codex CLI, Cursor, and Aider, and includes checks like mutation testing, property-based tests, and supply chain scanning, with effort scaling by risk. An old coder's strategy for the agent era: don't read the code — make it run the gauntlet. A skill that makes coding agents prove their work . Instead of you reading every line the agent writes, the agent must push its code through a gauntlet of checks — and hand you a test plan before coding and an evidence report after. You review those two documents, not the code. It's plain markdown, so it works with any coding agent that follows instructions: Claude Code, Codex CLI, Cursor, Aider, or your own agent loop. npx skills add https://github.com/amazingang/old-coder Or manually: Claude Code — copy the skill into a skills folder, then invoke /old-coder or let it trigger on "prove it works"-style requests: cp -r skills/old-coder ~/.claude/skills/ or