Gan Style Harness

This implements the adversarial generator-evaluator pattern from Anthropic's 2026 harness paper. Three agents work in sequence: a Planner expands your one-line prompt into a full product spec, a Generator builds it, and an Evaluator uses Playwright to test the live app and score it against design quality, originality, craft, and functionality. The Generator reads feedback and iterates until hitting a 7.0 weighted score or max iterations. Best for when you want production-quality output and can spend $50-200 on a full-stack app. Skip it for quick fixes or tight budgets. The key insight is that agents are terrible at evaluating their own work but you can engineer a separate evaluator to be ruthlessly strict.

Install to Claude Code

npx -y skills add affaan-m/ecc --skill gan-style-harness --agent claude-code