GAN-Style Harness Skill Inspired by Anthropic's Harness Design for Long-Running Application Development (March 24, 2026) A multi-agent harness that separates generation from evaluation , creating an adversarial feedback loop that drives quality far beyond what a single agent can achieve. Core Insight When asked to evaluate their own work, agents are pathological optimists — they praise mediocre output and talk themselves out of legitimate issues. But engineering a separate evaluator to be ruthlessly strict is far more tractable than teaching a generator to self-critique. This is the same dyna…