LongHorizon-Harness keeps AI agents from drifting on long tasks
LongHorizon-Harness introduces a Manage-Execute-Audit loop to prevent agent compounding errors on marathon tasks. Fresh executors handle single subtasks in clean contexts while an independent auditor verifies actual environment changes before logging progress. Swapping in the harness boosted Qwen 3.7-Plus pass rates on WeaveBench from 51.8% to 80.7%.