Copilot CLI 1.0.22: MCP Fixes & Agent Limits

TL;DR

• MCP tools now sanitized for all model providers; better image handling
• Sub-agents get depth/concurrency limits to prevent runaway spawning
• Plugin persistence, Anthropic BYOM/BYOK fixes, and session hook improvements

New

• MCP schema sanitization — Non-standard JSON schemas from MCP tools now work across all model providers without compatibility issues.
• Large image handling — MCP and extension tools can now process large images without degradation.
• Inline renderer optimization — New simplified renderer improves rendering performance.
• Skills field for custom agents — Agents can declare a skills field to eagerly load skill content at startup.
• Plugin post-install messages — Plugins can display setup instructions after installation.
• Plugin persistence — Plugins remain enabled across sessions and auto-install on startup based on user config.
• Sub-agent limits — New depth and concurrency limits prevent runaway agent spawning.
• Session conflict warnings — CLI warns when resuming a session already in use by another CLI or application.

Fixed

• Anthropic BYOM/BYOK permissions — Permission checks and hooks now work correctly with Anthropic models via custom configurations.
• Duplicated tool names in sub-agents — Sub-agent activity no longer shows redundant tool names (e.g., "view view the file").
• Slash command picker layout — Command picker now appears above text input for stable positioning.
• Remote session policy messaging — Clear message shown when remote sessions are blocked by organization policy.
• MCP config migration — CLI now reads only .mcp.json; migration hint appears when .vscode/mcp.json is detected without .mcp.json.
• V8 grapheme segmentation bug — CLI no longer crashes on systems affected by V8 engine bug in grapheme segmentation.
• Session hooks timing — sessionStart and sessionEnd hooks now fire once per session in interactive mode instead of once per prompt.
• Plugin agent model respect — Plugin agents now respect the model specified in their frontmatter.

Update via: npm install -g @github/copilot-cli@latest

Source: Copilot CLI