GitHub Copilot CLI Files

2026-05-18

• postToolUse hook additionalContext is now injected as a system message for the model instead of being silently discarded
• Mouse clicks in the prompt correctly position cursor when input contains wide characters (CJK, emoji)
• Add /chronicle search subcommand to search all session content by keyword or topic
• /user switch reuses the fetched user list and shows a loading spinner on first open
• MCP servers using static OAuth clients correctly persist registration for token refreshes
• Add support for running the CLI on Alpine Linux (musl libc)
• Add /exit print option to print the session to the terminal before exiting
• Add /rubber-duck command to get an independent critique of the agent's current work
• Add /session id subcommand to display the current session ID and copy it to the clipboard
• Add auth.redirectPort config option for MCP servers to pin the OAuth callback to a fixed port
• Add /memory on|off|show slash command to enable, disable, or view memory status (persistent)
• Add copilot plugin update --all to update all installed plugins at once
• Add /rubber-duck command to invoke the rubber duck agent for an independent critique (experimental)
• Input prompt collapses to a single line when empty and grows naturally as you type
• File diffs are correctly reported to ACP clients for all edit tool types
• Repo hooks in .github/hooks/ now load in prompt mode (-p) when the folder is already trusted
• Fix extra line in timeline entries
• Box drawing and block characters render correctly on Windows terminals not using UTF-8 code page
• MCP server configurations with no args field are now accepted and treated as an empty args list
• Document attachment paths are included in context so the agent can reference pasted file paths, including Windows Copy as path inputs
• MCP stdio servers now display type as 'stdio' instead of 'local' for consistency
• Progress bar indicator now displays correctly in tmux sessions
• Experimental slash commands are now annotated with "(experimental)" in the help dialog and command picker
• Auto-update downloads the smaller platform-specific package instead of the universal one when available
• Auto-link GitHub issue and PR references (owner/repo#number) in assistant responses
• Prompt mode (-p) automatically loads workspace MCP sources when the current folder is already trusted
• Experimental: /mcp search command to search and install MCP servers from registry
• Experimental: Tool search with deferred loading for MCP and external tools
• Add "None" reasoning effort option to disable model reasoning in the reasoning effort picker
• Add COPILOT_PLUGIN_DIR_ONLY environment variable to disable automatic plugin discovery, enabling deterministic plugin sets when using --plugin-dir
• Copying text from the scroll view joins soft-wrapped lines without extra newlines or indentation
• Cursor positioning in input fields works correctly with wide characters (CJK, emoji)
• Hooks (preToolUse, postToolUse, subagentStart, subagentStop) now fire correctly for sub-agent tool calls
• Plugins loaded via --plugin-dir now correctly register their agents as available task(agent_type=...) subagents in prompt mode
• Memory storage correctly limits available scopes when no repository context is present
• --plugin-dir and --additional-mcp-config now work in --server / --headless mode
• Content-filtered model responses now display an explanation instead of a blank assistant turn
• PromptFrame UI now renders inside tmux when the outer terminal is ghostty, WezTerm, or kitty (detected via tmux list-clients).
• MCP OAuth token lookups are correctly scoped to the active session
• Memory permission prompts now name who can see a stored memory: user scope or the specific owner/repo for repository scope. Timeline entries also show the scope ((for user) / (shared with repository collaborators)).
• Reduce PowerShell syntax errors on Windows by avoiding && chaining instructions when using legacy PowerShell 5.x