Walks through how a tool-calling agent harnessThe scaffolding around a model that turns it into a working agent — the loop, the tools it can call, and the rules for when to stop.Full definition → works and how to fine-tuningTaking a trained model and training it a bit more on your own examples so it gets better at one specific job.Full definition → a 9B model on AI agentAn AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.Full definition → traces so it calls tools reliably in your own harness. Useful as a practical path to running small local agents.
Terms in this piece · Glossary
agent harness — The scaffolding around a model that turns it into a working agent — the loop, the tools it can call, and the rules for when to stop.
tool use — A model's ability to call external functions — run code, search the web, edit files — instead of only generating text.
fine-tuning — Taking a trained model and training it a bit more on your own examples so it gets better at one specific job.
AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.
