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Your first agent loop

Plan, act, observe, repeat. You will write the thirty lines of code every agent is built on, give it tools, and learn to stop a loop that never ends.

  • Intermediate
  • 10 lessons
  • ~90 min
  • text + code
Start lesson 1 →

By the end you'll be able to

  1. Explain the plan → act → observe loop in your own words.
  2. Write a working tool-calling loop in about 30 lines.
  3. Debug a loop that never ends.

Syllabus

M1: What an agent is

  1. 1. Agents are loops — not startedchat8 min · +40 neurons
  2. 2. Describing a tool — not startedchat9 min · +40 neurons
  3. 3. Running a tool — not startedchat9 min · +40 neurons

M2: Building the loop

  1. 4. The loop — not startedchatcode10 min · +60 neurons
  2. 5. Stop reasons — not startedchat8 min · +40 neurons
  3. 6. Many tools at once — not startedchat9 min · +40 neurons
  4. 7. When loops go wrong — not startedchat9 min · +40 neurons

M3: Shipping it

  1. 8. Memory — not startedchat9 min · +40 neurons
  2. 9. Limits and logs — not startedchat9 min · +40 neurons
  3. 10. Checkpoint: a weather agent — not startedchatproject10 min · +80 neurons