Module · Intermediate · 1h 15m
Module 1: Tools and the loop
The mechanics of tool calling and the loop that makes an agent, built by hand once so the frameworks make sense.
- Claude
- ChatGPT
- Any assistant
- agents
- module
Inside this module
- Implement a tool with a schema and a structured failure
- Run a bounded agent loop
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Sign inLessons
- 01Your first tool call
Lesson · 25 min · Define one tool, let the model call it, and return the result — the whole mechanism in forty lines.
- 02The agent loop with a budget
Lesson · 25 min · Turn one tool call into a loop that runs until a final answer or a budget, never forever.
- 03Tools that fail well
Lesson · 25 min · Designing tool results so the agent can be honest about failures instead of inventing around them.
