Descriptions:
David Ondrej delivers a comprehensive 30-minute course on Pi Agent (pi.dev), an open-source AI coding agent he describes as one of the fastest-growing repositories on GitHub. Unlike heavier tools such as Claude Code or OpenAI Codex, Pi Agent is designed around minimalism — its system prompt is roughly 1,000 tokens, about 10–15x leaner than comparable agents — making it highly customizable for developers who want full control over their AI workflows.
The course walks through the full setup process: installing Pi via a one-line curl command, authenticating through providers like OpenRouter, selecting models (including Anthropic’s Claude Opus 4 and Opus 4.8 Fast), and adjusting thinking effort levels via keyboard shortcuts. Ondrej explains the philosophical difference between AI “products” (opinionated, feature-heavy) and AI “harnesses” like Pi, which ship with just four core tools and leave the rest to the user.
A significant portion of the video covers Pi’s “skills” system — reusable, user-defined prompt templates stored locally that Pi reads before executing tasks. Ondrej demonstrates over 50 custom skills he has built, including a research prompt generator that creates optimized prompts for deep-research tools like Perplexity. The course is aimed at developers looking to move beyond off-the-shelf AI coding assistants and build personalized, efficient agent workflows around a lightweight, provider-agnostic core.
📺 Source: David Ondrej · Published June 12, 2026
🏷️ Format: Course Lesson
