Unverified50% confidenceFactExact time
In the Agent context, a Harness refers to the execution shell that wraps the large model, responsible for prompt assembly, tool-call parsing, loop control, context trimming, and so on, and is decoupled from the model itself.
1
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50%
Confidence
Long-term
Relevance
10/20/2026
First Seen
Sources
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Related Claims
VerifiedAgent Harness refers to the entire engineering system wrapped around a large language model that is responsible for coordinating the model's interactions with the external world.79% similarUnverifiedThe Agent Harness does not replace the reasoning capability of the core model, but instead builds a runtime management shell around the model, responsible for cross-cutting concerns such as tool invocation, state management, and error recovery.79% similarVerifiedThe harness agent architecture has multi-step autonomous planning capabilities and can cyclically execute model inference → code operations → result feedback until a task is complete.79% similarUnverifiedHook middleware provides the ability to insert custom logic at key nodes in the Agent execution flow, allowing hooks to be attached before model invocation, after tool execution, during context assembly, and at other points, enabling functions such as logging, permission validation, content filtering, and performance monitoring.78% similarUnverifiedThe essence of an Agent is wrapping a one-time large model call inside a continuously running while loop.78% similar
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