Learn by making

Tutorials

A sequence to follow, a workspace to practice in, and checks that tell you what you actually learned.

Looking for standalone articles? Visit Writing.

A notebook task moves through a local harness, a custom workspace, and a checked result.

A hands-on tutorial · 19 lessons

DeepSeek Harness, one task at a time

For developers already working with Codex, Claude Code, or similar agents. Study the execution loop, tool and policy boundaries, context pressure, recovery, and orchestration through reviewable repository work.

180 min reading, plus practice at your own pace.

Start learning View the syllabus