
Grow the Harness, Not the Context: From Strategy-Free Scaffolds to Reusable Specialist Agents
The method replaces per-task in-context reconstruction of control logic with a shared executable harness that is iteratively grown from failure traces, reserving LLM calls for task-specific reasoning. It costs an offline optimization loop with function-level tracing, joint failure repair, and gated rollback, plus ongoing maintenance of an accumulating code artifact whose complexity grows with use. After adoption it can fail when repairs overfit to the training task distribution, when the success gate misses regressions not covered by held-out tasks, or when task drift makes the frozen control code obsolete.






















