Follow the evolution of SKILLS,
like subscribing to RSS.
SKILLRSS collects every update to the leading AI agent skills, dissects their structure and design layer by layer, and distills version history into reusable patterns — so you learn to build your own skills faster.
8 shared interpretations published
Reviews animation and motion code against a high craft bar derived from Emil Kowalski's design engineering philosophy. Identifies violations of ten non-negotiable standards covering justification, frequency, easing, duration, origin, interruptibility, GPU-only properties, accessibility, asymmetry, and cohesion.
07-29Generates multiple genuinely different, fully functional UI variants for a described component, with a live picker to compare them side-by-side and promote a winner.
07-29Provides curated, opinionated recommendations for frontend libraries across UI primitives, motion, charts, interaction, state, and styling.
07-29Survey a codebase's animation and motion code as a senior motion advisor, then produce a prioritized audit and self-contained implementation plans for other agents (or cheaper models) to execute.
07-29Published skill interpretations
No more digging through changelogs repo by repo. Every tracked skill is analyzed in a sandbox and dissected layer by layer into a shared interpretation; subscribe to read the full text.
Take a skill apart
A good skill isn't a longer prompt — it's a layered structure. Using Cloudflare's official Durable Objects skill as an example, here's what it is made of.
--- name: durable-objects description: Create and review Cloudflare Durable Objects. Use when building stateful coordination (chat rooms, multiplayer games, booking systems) … --- # Durable Objects ## When to Use - Creating new Durable Object classes for stateful coordination - Implementing RPC methods, alarms, or WebSocket handlers - Reviewing existing DO code ## Reference Documentation - ./references/rules.md - ./references/testing.md - ./references/workers.md
Excerpt from the real repository cloudflare/skills · durable-objects
Trigger definition
SKILL.mdThe metadata at the top decides when this skill gets invoked. The name, a one-line purpose, and — most critically — the trigger conditions all live here.
Teach the model when to use it before teaching it how.
Step-by-step instructions
instructionsThe task is broken into ordered, checkable steps. Each step is an action that can be verified on its own, not a vague paragraph.
Only steps you can verify are steps you can rely on.
Resource files
resources/Specs, templates, and examples live in separate files that the instructions reference only when needed. Updating knowledge never touches the core logic.
Keep what changes apart from what doesn't.
Script tools
scripts/Deterministic operations are delegated to code. The model judges and orchestrates; the repetitive, precision-critical parts no longer depend on it.
If code can guarantee it, don't make the model guess it.
Principles distilled from evolution
These principles aren't just about writing skills. They are really about how to hand a complex job to a model and still get it done well.
Don't miss the next evolution
One email a week: the skill updates worth your attention, plus one reusable anatomy note.
FREE · UNSUBSCRIBE ANYTIME