I have mentioned these skills at a lot of events, but I have never put them all in one place. These are the ones I return to when I work with AI.

Where I find skills

Skills.sh

Skills.sh is where I find skills. You can browse what people are building, and it shows security audits too.

A skill is a set of instructions for an AI agent that can often read files, run commands and call tools on your behalf. Look at the available audits and read the skill itself before you install it. A useful skill can still be wrong for your environment.

Microsoft's agent skills gallery

Microsoft's agent skills gallery is made by the Microsoft CAT team. It is worth a look if you use Copilot Cowork, Copilot Studio or Scout. You can filter by platform and tag, and the gallery takes community contributions too, so you can share work that others might find useful.

Each entry includes its instructions and downloads, so you can see what you are adding before you use it. Still do your own review, but it is a useful starting point for Microsoft-focused work.

Skills I keep using

Grill Me

Matt Pocock has a bunch of great skills. Have a look through his collection. The one I use most is Grill Me. It asks me the right questions while I am refining a project plan, before the agent goes all out. I would rather get that pushback while the approach is cheap to change than after I have built the wrong thing efficiently.

Frontend Design

Frontend Design by Anthropic is another great one. It helps a lot, though it is not a 100% solution. Use it as a starting point and edit it to cover what you need.

For me, that meant adding guidance for HTML and CSS design for Outlook. I use it often with Copilot Cowork, and I do not want it producing CSS that Outlook does not support. That addition makes it much more useful for my work.

Impeccable

Talking about design, Impeccable is one of my favourites. It is a design plugin for apps, websites and more. I used it for this site too.

I find it most useful when something works but still feels like a first version. It helps me turn a functional idea into something I want people to use.

Humanizer

When writing with AI, I get annoyed by obvious AI tells: em dashes, repeated openings and the other patterns people spot from miles away. That is why I use Humanizer. It does a good job of removing them.

My advice on top of that skill is to add your own flavour. Ask AI to look at emails and instant messages you have sent and extract your writing style. Humanizer can remove generic patterns, but your own examples make the writing sound like you.

Make them yours

Read them, check the audits, and change them for the work you actually do. Good instructions give an agent better direction, and your own changes make them useful for you. I hope this helps you find a few that work for you.