ThinHarness

Minimal open-source Python harness for building focused AI agents.

Webfreeglobal

ThinHarness is a minimal, open-source Python harness that provides the tedious agent-loop primitives (scoped tools, retries, structured output, MCP support) needed to build a focused AI agent in under 8,000 lines of code, without the sprawl of a full framework. It targets developers who want purpose-built agents without rebuilding primitives from scratch or adopting a heavy framework.

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