Domain-agnostic planner / generator / evaluator harness for long-running complex tasks. Scaffolds a .harness/ folder per project with typed JSON handoffs, calibrated evaluators, pivot-on-stuck, and continuous JSONL logging.
Three-role harness — planner sets outer lines, generator builds, evaluator operates the artifact and grades against a weighted rubric. Each role runs as a fresh subagent with its own context window.