Copilot CLI v1.0.3: Extensions & MCP Config

TL;DR

• Extensions now available as experimental feature — write custom tools and hooks for Copilot
• MCP server config now reads from .devcontainer/devcontainer.json
• New /restart command hot-reloads CLI while preserving session state
• Multiple UX fixes: login hangs on Ubuntu, terminal reset on crash, screen reader accessibility

New

• Extensions (experimental) — Ask Copilot to write custom tools and hooks for itself using the @github/copilot-sdk
• MCP server config from devcontainer.json — Read configuration directly from .devcontainer/devcontainer.json instead of separate setup
• /restart command — Hot restart the CLI while preserving your session state
• --binary-version flag — Query the CLI binary version without launching the full interface
• Windows Terminal support — /terminal-setup command now works with Windows Terminal
• Background task timeline — Task notifications display in timeline with expandable detail
• extraKnownMarketplaces setting — Replace marketplaces via repository configuration
• Alternate screen buffer for staff — Enabled by default for staff users
• 'quit' command — Exit the CLI with 'quit' in addition to 'exit'

Fixed

• Login flow no longer hangs on Ubuntu when system keyring is unresponsive
• Terminal properly resets when CLI crashes unexpectedly
• Batched query handling improved in the SQL tool
• MCP servers with non-conforming outputSchema are now accessible
• /plugin update now works for GitHub-installed plugins and marketplace-defined plugins
• /reset-allowed-tools fully undoes /allow-all and re-triggers the autopilot permission dialog
• /add-dir directories persist across session changes like /clear and /resume
• Placeholder text color displays correctly when wrapping in narrow terminals
• Retry status messages display to show progress during server error recovery
• Loading spinner now shows in diff mode while fetching changes
• Table borders disabled in screen reader mode to prevent announcing decorative characters
• Unknown field warnings suppressed in skill and command frontmatter
• Safe sed commands trusted to run without confirmation

Breaking Changes

• merge_strategy config renamed to mergeStrategy for consistency — update your configuration files
• env command no longer treated as safe to allow without approval

Update with: gh copilot update

Source: Copilot CLI