Thought Artisan

Aug 18, 2026 · Artificial Intelligence

LLM-Harness Coupling: How Model Differences Shape Code Agent Architecture

The article examines whether code agent frameworks (Harness) are tightly coupled to specific LLMs, analyzing differences in training alignment, attention mechanisms, safety guardrails, and chat format protocols that require model-specific adaptations, and explores architectural abstraction strategies using OpenCode as a reference.