⚡ AN AGENTIC HARNESS IS JUST A LOOP! ⚡
It's true! An agentic harness is just a loop with tools.
How does a coding agent work? There are only a few basic elements!
- A system prompt specifies the role of the agent and the tools available to it.
- When the user sends a prompt, the model responds, possibly using tools.
- If the model responds with a tool call, the harness executes it and returns the response to the model — this is a new API request, including the full conversation history.
- When the model response does not include a tool call, the loop pauses until another prompt is sent by the user.
🚧 UNDER CONSTRUCTION 🚧
This corner of the web is always being renovated — new
wisdom about harnesses gets added whenever I learn it. Check back
soon!
Curious what happens inside each of those four steps? Head over to The Loop, Zoomed In for the long version, or look up a term in the Glossary if the jargon's got you stuck.
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