Overview
- GitHub updated Copilot CLI to support custom agents defined by .agent.md files that live in a repository and specify an agent’s role, tools, scope, and guardrails.
- Those agent profiles use Markdown with YAML front matter so teams can version, review, and share the exact behavior they want the CLI agent to follow.
- Copilot CLI agents can run scripts, call APIs, and interact with repositories so developers can invoke the same end-to-end tasks from the terminal instead of retyping commands or re-explaining context.
- Documented use cases include security audit agents that run checks and generate pull request–ready checklists and accessibility agents that apply WCAG rules and produce concrete guidance.
- The change moves terminal AI from one-off prompts to agent-as-code, which should cut repetitive work, improve consistency across teams, and create new points for governance and review in development workflows.