Copilot CLI v1.0.51-3: Security Review & MCP Auth Fixes

Copilot CLI 1.0.51-3 adds security vulnerability scanning, fixes MCP OAuth session persistence, and improves the experimental mode indicator. New /chronicle cost-tips command helps optimize token usage.

Copilot CLI v1.0.51-3: Security Review & MCP Auth Fixes

TL;DR

  • New /security-review command scans code changes for vulnerabilities
  • MCP OAuth sessions now persist across separate authentication flows
  • Experimental mode indicator moved to persistent header display

New

  • /security-review slash command — Review code changes for security vulnerabilities directly in the CLI
  • preMcpToolCall hook — Hook providers can now control outgoing MCP request metadata
  • /chronicle cost-tips subcommand — Get personalized token usage and cost reduction recommendations

Improved

  • Experimental mode indicator — Now persists in the app header instead of showing as a one-time notification
  • Loading indicator colors — Match the active mode (plan, autopilot, shell) for better visual feedback

Fixed

  • MCP OAuth persistence — Servers using OAuth stay connected when authentication happens in a separate session
  • GFM rendering — Tables and blockquotes inside list items now render correctly without floating top borders

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

Source: Copilot CLI