Post #232296 2.29K Sep 15, 2026, 18:41 UTC How AI tool calling works (40 lines of vanilla JavaScript)Article, Comments buttercup.sh lesson 2: tool calling - free AI Agent training from buttercup.sh Lesson 2 of the free buttercup.sh agent course: the twenty-line loop that turns a chat model into an agent, working JavaScript and Python, what each turn costs in tokens, and an exercise you run in the browser. 🤮 19 🌭 2