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Own the Loop: A Field Guide to Agent Harnesses
Ownership of the agent 'harness'—the orchestration layer—will become more valuable than the model itself as coding agents become commoditized.
What: Aparna Dhinakaran argues that while vendor-native harnesses (like Claude Code) offer superior performance today, building model-agnostic, portable orchestration loops provides a more durable competitive advantage for developers.
Why it matters: The industry is approaching a bifurcation: tightly integrated, high-performance 'black box' agent platforms versus modular, developer-owned agent architectures that can swap models as costs and capabilities fluctuate.
Decoder
- Harness: The control loop that manages an agent's workflow, including tool execution, model routing, and error handling.
Original article
Own the Loop: A Field Guide to Agent Harnesses
The better a harness fits its model, the less of it is yours. The most capable coding agents today are model-native pairs: a frontier lab matches its best model to its own harness. Claude Code is...
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