GitHub Copilot CLI v1.0.40

2026-05-01 - PR branch decoration displays correctly in the footer regardless of model name length - /clear and /new reset the active custom agent selection - Assistant responses stream with smooth...

2026-05-01 - PR branch decoration displays correctly in the footer regardless of model name length - /clear and /new reset the active custom agent selection - Assistant responses stream with smoother text output - copilot plugin list shows the correct version after running copilot plugin update - Add support for clientcredentials OAuth grant type for MCP servers, enabling fully headless authentication without a browser - Subagents correctly evaluate tool search support for their own model instead of inheriting the parent session's settings - Switching sessions with /new or /resume no longer carries over pending messages to the new session - CLI no longer hangs at 100% CPU when sending a large file attachment - Resume session picker no longer shows duplicate entries for the same Mission Control-backed session - Session resume selector displays summaries on a single line, truncated to fit the column width - Print "Exiting…" to stderr immediately on Ctrl+C during prompt mode so shutdown progress is visible - /research uses an orchestrator/subagent model for more thorough and reliable deep research results - Autopilot mode now limits continuation messages to 5 by default (configurable with --max-autopilot-continues) - Automatically clean up old CLI package versions from disk during auto-update - Remote session statusline shows the remote working directory and branch instead of local context - /update no longer re-submits the original -i prompt after restarting - Detect Azure DevOps repositories and auto-disable the GitHub MCP server - Session history, file tracking, and the /chronicle command are now available to all users - Skills are available as slash commands in ACP clients, matching the CLI experience - Resuming a session no longer falsely reports it as in use after a previous CLI process exited unexpectedly - --config-dir now propagates correctly to plugin subcommands; --config-dir is deprecated in favor of COPILOTHOME - Mouse selection works while the /ask response dialog is open, so its content can be highlighted and copied - Improve CLI startup speed by loading custom CA certificates asynchronously - Remote control link shows the full URL in the timeline instead of 'Open in browser' - ACP clients (e.g. Zed) now display the agent's live plan as it works through multi-step tasks - Add toggle for custom statusLine.command visibility in the statusline picker - ACP clients can now list and switch custom agents via the agent config option - MCP OAuth tokens cache correctly when multiple servers share the same URL but use different static OAuth client IDs - MCP tool names with dots or other invalid characters are now sanitized correctly - Ctrl+C and double-Esc remove pending queued messages one at a time instead of all at once - Slash command suggestions rank prefix matches above fuzzy matches - Prompt mode (-p) now gates repo hooks and workspace MCP behind opt-in env vars (GITHUBCOPILOTPROMPTMODEREPOHOOKS and GITHUBCOPILOTPROMPTMODEWORKSPACEMCP) for secure-by-default behavior