GitHub/copilot-CLI: GitHub Copilot CLI – Copilot coding agent (github.com)

GitHub announced Copilot CLI, a terminal-native extension of the Copilot coding agent that brings AI-powered code authoring, debugging, and repository-aware assistance directly into your shell. The CLI runs an agent that understands local code and GitHub context, lets you access repos, issues, and pull requests with natural-language commands, and can plan and execute multi-step edits (with mandatory preview/approval before making changes). It’s pitched as a synchronous, low-friction way to build, refactor, and troubleshoot without switching to a separate UI. Technically, Copilot CLI ships as an npm package (@github/copilot) and requires Node.js v22+, npm v10+, and an active Copilot subscription; supported platforms are Linux and macOS (Windows experimental). By default it uses Claude Sonnet 4 but can run GPT-5 via COPILOT_MODEL=gpt-5. The agent is extendable via GitHub’s MCP server (and supports custom MCP servers for enterprise/custom deployments). Each prompt consumes a premium request from your monthly quota, and org admins can disable CLI access centrally. The release is an early preview—frequent updates are expected—and GitHub is soliciting feedback and bug reports as they iterate.