General Availability Launch

GitHub Copilot CLI has graduated from public preview to general availability for all Copilot subscribers. Since launching in September 2025, the team shipped hundreds of improvements based on developer feedback, transforming it from a simple terminal assistant into a full-featured agentic development environment.

Agentic Development Capabilities

Copilot CLI operates as an autonomous coding agent rather than just a chat interface, offering multiple modes for different workflows:

• Plan mode (Shift + Tab): Analyzes requests, asks clarifying questions, and builds structured implementation plans before writing code
• Autopilot mode: Executes complex tasks end-to-end, including file editing, test running, and iteration without requiring approval at each step
• Specialized agents: Automatically delegates to dedicated agents for codebase exploration, build tasks, code review, and planning
• Background delegation: Prefix prompts with & to run tasks in the cloud, freeing your local terminal for other work

Model Flexibility and Extensibility

Developers can choose from latest models including Claude Opus 4.6, Claude Sonnet 4.6, GPT-5.3-Codex, and Gemini 3 Pro. GPT-5 mini and GPT-4.1 are included with Copilot subscriptions at no additional cost. Switch models mid-session with /model and configure reasoning effort as needed.

The platform is highly extensible through:

• Plugins: Install custom or community plugins directly from GitHub repositories
• Agent skills: Markdown-based files that teach Copilot specialized workflows, syncing across CLI, coding agent, and VS Code
• Custom agents: Define specialized agents with custom tools, MCP servers, and instructions
• Hooks: Extend behavior at key lifecycle points with pre- and post-tool-use hooks

Session Management and Developer Tools

• Infinite sessions: Auto-compaction compresses conversation history at 95% context window capacity
• Repository memory: Copilot learns and remembers codebase conventions across sessions
• Review tools: /diff for syntax-highlighted inline diffs, /review for quick change analysis, and Esc-Esc to rewind to previous snapshots

Installation and Experience

Copilot CLI runs on macOS, Linux, and Windows with installation options including npm, Homebrew, WinGet, and standalone executables. Auto-updates are enabled for Homebrew, WinGet, and script installations. The polished terminal experience includes alt-screen mode with full-screen UI, theme picker, shell integration, full keyboard navigation with UNIX keybindings, and accessibility features like screen reader support.