Custom Copilot Agents: Building Domain-Expert AI Teammates with Skills, MCP Tools, and Custom Knowledge (opens in new tab)

Most Teams Are Still Using 5% of Copilot Most developers still treat GitHub Copilot like a very good autocomplete engine. That's useful, but it's not the real unlock. The interesting shift happens when Copilot stops acting like a generic assistant and starts acting like a domain-expert teammate. Instead of re-explaining your deployment rules, your content pipeline, or your release checklist every session, you package that expertise once. Then Copilot shows up already knowing the job. That's t...