176 Controlled Experiments Quantify How Agent Harness Design Affects Performance

Researchers ran 176 controlled experiments on 500 real GitHub issues and 89 CLI tasks, showing harness design significantly shapes agent performance, with context overflow causing 78.7% of task failures.

2026-09-25 ~ 2026-09-25 · 2 related posts

• Context overflow fails 78.7% of coding agent tasks; memory fixes lift solve rate to 58% — alex_verem · 2026-09-25
• Harness design, not the model, drives coding agent scores: 176-setup study quantifies it — alex_verem · 2026-09-25