Taste Becomes Leverage When the Course Ships With a Skill File
The SKILL.md-as-course-artifact pattern maps directly to joelclaw skills and badass_courses packaging: teach taste once, then let agents carry it into actual work.
Emil Kowalski wrote a breakdown of building animations.dev, his animation course. It starts with a January 2024 presale with zero content and, by the article’s count, more than 10,000 enrolled students.
The clever bit isn’t just the presale. It’s packaging as pedagogy: the butter-cube logo from Nev Flynn, animated SVG paths, a student-built hero, a customizable Motion Passport, stickers, keycaps with Maxime Heckel, a custom course platform, interactive demos, autosaved exercises, and more than 50 exercise walkthroughs. The course is teaching motion, so the product itself has to move. No dry wall of text bullshit.
The sharpest move is the SKILL.md. Emil includes an “Animations and AI” module where students can feed course knowledge to coding agents so the agent can review animations, suggest improvements, build motion, and answer motion questions. That’s the whole taste-transfer problem in miniature: AI makes code abundant, so judgment, examples, and constraints become the valuable thing.
Joel’s Slack note adds the funny footnote: Emil worked with Amy Hoy and Alex Hillman, but this post doesn’t mention that lineage. Still, the shape rhymes with Stacking the Bricks and 30x500: presell, constrain the promise, make the product itself proof, and build something people talk about because it actually helps.
Key Ideas
- animations.dev uses the course platform as part of the lesson: interactive demos, custom components, an embedded code editor, autosaved progress, video walkthroughs, and written solutions make animation something students can feel instead of just read about.
- The SKILL.md pattern turns course knowledge into agent-usable operating instructions, which is directly relevant to Pi-style skills and the way joelclaw packages repeatable taste.
- The packaging is not decoration: the butter logo, melting enrollment animation, Motion Passport onboarding, stickers, and keycaps all reinforce that the course cares about motion and interface detail.
- Emil Kowalski frames AI as leverage, not a replacement for taste: models can write code, but people who understand easing, duration, and interaction quality get more dangerous.
- The living-course model matters: free updates, a changelog, a resource Vault, expert interviews, and custom easings keep the course from becoming a frozen screenshot.