Copilot CLI v1.0.51 Ships /security-review Slash Command: Automated Vulnerability Detection for Code Changes With Remediation Guidance

GitHub·medium signal

GitHub released Copilot CLI v1.0.51 on May 20, 2026, adding /security-review as an experimental command that analyzes code changes for common vulnerabilities including SQL injection, XSS, authentication flaws, and dependency issues. The release also includes /chronicle cost-tips for token cost analysis and a preMcpToolCall hook for controlling MCP request metadata. The security review scans staged changes and generates detailed remediation guidance.