Engineer Copilot Agent

Use this skill to create or improve GitHub Copilot custom agents. Treat triggering, routing, handoffs, and prompt size as separate concerns. Keep the top-level agent contract lean.

Read references/copilot-agent-standard.md for the baseline contract and references/context-minimization-loop.md before editing.

When to use this skill

Use it when the user wants to:

• create a new Copilot custom agent
• improve an existing .agent.md file
• remove stale tool, skill, or agent names
• tighten tool-calling or MCP skill routing
• clarify subagent handoffs and ownership
• trim a bloated agent prompt
• add eval coverage for routing regressions

Do not use this skill for prompt-only or skill-only work unless the target artifact is a Copilot custom agent contract or the user explicitly wants to design one.