behavioral harness
AssessTechniques
A structured control layer that constrains and evaluates an agent’s behavior during execution.
Why it's here
Placed in Assess: 1 article(s) of evidence from 1 source(s), led by research-stage coverage, with 1 in the last 30 days. Confidence 24%. Low accumulated evidence, so it defaults conservatively pending more signal.
Evidence (1)
- 6Martin Fowler·10/13/2026researchBehavioral Harness Improves Reliability for Cost-Optimized Coding Agents
Naresh Jain compared two coding agents building the same API service, with and without a behavioral harness. The harness did not change the frontier model’s perfect results, but it raised a cost-optimized model from 3/10 successful runs to 10/10 while still costing 33% less per run than the frontier model.