LLM-powered zero-day vulnerability analysis of code changes — a commit, a pull request, a file or a branch — in light, standard or deep mode, with cost budgeting and knowledge-graph linking. Use whenever someone asks to scan for vulnerabilities, check for security issues, mentions 0-day or zero-day, or wants a specific commit, PR, diff or branch reviewed for security. Prefers the `analyze_for_zero_day_vulnerabilities` MCP tool and falls back to the per-language reference packs plus the 8-point check scoped to the diff. For a whole-repo pass use `security-assessment`.
