Setup & Foundations

This section covers everything you need to get productive — whether you choose Claude Code (general agent), OpenCode (open-source coding agent), or both. From understanding why these tools exist to writing your first project context file and personalizing how your agent works. By the end, you'll have your chosen agent installed, configured, and tuned to your preferences.

Lessons 1-7 take you from zero to a working agent setup with context files (CLAUDE.md or AGENTS.md) and personal customizations.

Using OpenCode instead?

Every lesson in this section also covers OpenCode, the open-source coding agent. Claude Code is a general agent (broad-domain); OpenCode is narrower in scope (code-focused), but the primitives are the same: where Claude Code uses CLAUDE.md for project context, OpenCode uses AGENTS.md, and both follow the same pattern: install, authenticate, run from a project directory, and let the agent read project context. Lessons include side-by-side tabs so you can follow either tool.