What problem does it solve? Security issues slip through code review because reviewers skim instead of systematically tracing untrusted data to dangerous operations. This Skill enforces a six-phase, advisory-only security review that detects vulnerabilities with evidence (file:line, dataflow trace, CWE/OWASP mapping) and never edits the code under review. ## Core Features & Use Cases - Systematic 11-Class Review: Works through injection, XSS, access control, authentication/sessions, cryptography, secrets, dependencies/supply-chain, configuration/IaC, API security/SSRF, logging/privacy, and LLM/GenAI risks, anchored to OWASP Top 10 2025, CWE Top 25 2025, ASVS 5.0, and the OWASP API and LLM Top 10. - Tooling Plus Manual Verification: Runs available SAST, secrets, and dependency scanners (never installing anything), plus bundled scripts for deterministic secrets scanning and dependency extraction for online advisory lookup. - Mandatory Online Research: Resolves doubt about unfamiliar APIs, version-specific behavior, and dependency CVE status through authoritative sources (OSV, NVD, GitHub Advisory) instead of guessing. - Use Case: Before merging a pull request touching authentication and payment flows, run this Skill to map the attack surface, trace user input to SQL queries and shell calls, check dependency versions against OSV advisories, and receive a severity-grouped findings report with a fix-before-merge verdict. ## Quick Start Ask the AI to perform a security review of the changed files in this pull request, focusing on the authentication and payment flows.