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01 ·Agents·★ MEMBER·PAPER·11 min read Paper Walkthrough: AutoSaddler — Growing a Harness That Doesn't Break, from Agent Failure Logs A ground-up walkthrough of AutoSaddler, which automatically optimizes the harness around an LLM agent — prompts, tools, and middleware — by repeatedly diagnosing failure traces and generating structured patches. It beat the base harnesses on GAIA2, SWE-Bench Pro, and Terminal-Bench 2.0 by 9.0, 9.6, and 10.0 points.