CLI starts faster by rendering the UI immediately while authentication resolves in the background
Shell completions (bash, zsh, fish) are automatically installed on first run and updated after copilot update
Tab-completing slash commands that accept arguments now adds a trailing space automatically
Package extraction no longer crashes on Windows when antivirus or filesystem locks cause transient EPERM errors
Remote session connection errors show your logged-in account and tailored remediation steps
Markdown formatting renders in ask user prompt questions
Add experimental MCP Tasks support: MCP tools with taskSupport: "required" run as non-blocking background agents trackable via list_agents and read_agent (available when experimental mode is enabled, e.g. via /experimental on or the --experimental flag)
Extensions now load in prompt mode (-p). User extensions load by default; project extensions alnd management tools require GITHUB_COPILOT_PROMPT_MODE_EXTENSIONS=true.
Assistant responses no longer contain spurious system notification XML tags
Large output guidance correctly references the configured grep tool name
Adding a plugin marketplace using a git SSH URL (e.g. git@github.com:owner/repo) now works correctly
Slash command picker searches command descriptions and underlines matched characters
Memory tool confirmation prompt now shows the scope (repository or user) when requesting permission to store a memory
SQL todo timeline entries display more accurately for INSERT OR IGNORE/REPLACE and blocked status updates
Streaming text and shimmer animations stay smooth on slow or busy hosts
Add --attachment flag in non-interactive (-p/--prompt) mode to attach files (images or native documents) to the initial prompt
@-mention completion works for ./ paths, no longer adds trailing space on directories, and shows project files before workspace roots
Improve stability on Windows by working around a V8 crash in Node 24.x
Session files containing Unicode line separator characters load correctly
Reasoning effort picker hint text displays "Esc to cancel" with correct spacing
Improve reliability of file edits by better recovering from fuzzy or misaligned edit blocks