Which Copilot this is
This guide is for Copilot with a personal Microsoft, Apple or Google account, at copilot.com or in the Copilot app. Signed in with a work or school account? That is Microsoft 365 Copilot. The coding tool is GitHub Copilot. Apps with their own place for skills: Claude, ChatGPT and Gemini.
Not tried yet
Trilly hasn't tried a skill in this app. Pasting a skill's text at the start of a chat is something any chat app can be given, but we haven't checked how Copilot treats a long pasted text.