On 3 February 2026 I gave a talk at the Epitech Summit in Mulhouse about using Markdown as a programming language when building with AI. The idea is easy to accept. The question that always comes after it is harder: what do I actually run?

In this article I'll answer that question. The install, the commands in order, and one mistake that will cost you twenty minutes if nobody warns you about it.

A note before we start. I keep this page up to date, so the commands below are the ones that work with Spec Kit 1.2.5, not the ones I showed on the day of the talk. The CLI has changed some names since then, and a guide that doesn't run is not useful to anyone. If you want the reasons behind this approach rather than the commands, I wrote a separate article about it.

What Spec Kit is

Spec Kit is an open source toolkit from GitHub for spec-driven development. It's MIT licensed, and it moves fast: version 1.2.5 was released on 28 October 2026.…