{
  "slug": "zk-skills",
  "name": "zk-skills and circom-auditor",
  "tagline": "Open-source security skills for coding agents, scoring 66 of 70 on zkbugs",
  "maintainer": "zkSecurity",
  "url": "https://github.com/zksecurity/zk-skills",
  "repo": "https://github.com/zksecurity/zk-skills",
  "category": "crypto-zk",
  "targets": [
    "Circom",
    "Claude Code",
    "Codex",
    "Cursor"
  ],
  "approach": "Agent skills (prompts, workflows and checklists) that turn a general coding agent into a Circom auditor",
  "license": "Open source (MIT)",
  "status": "Active (released 2026-08-05)",
  "since": "2026-08-05",
  "summary": "zk-skills is zkSecurity's open-source set of security skills for Claude Code, Codex and Cursor. Its circom-auditor skill scores 66 of 70 known bugs with Claude Opus 4.8 and 64 of 70 with GPT-5.5 on the zkbugs benchmark in direct mode, and 40 of 56 and 14 of 56 on full original codebases, against 30 of 70 and 8 of 56 for the Ecne tool. It is positioned as a pre-audit first pass, with zkao as the continuous deep option.",
  "details": [
    "The skills package the same audit patterns zkao uses into files any team can drop into its agent. The gap between direct-mode and full-codebase scores is the honest number: pointing an agent at a whole repository is much harder than at a known-vulnerable template."
  ],
  "strengths": [
    "Free, open and runnable today with the agent you already use.",
    "Benchmarked publicly in both easy and hard modes.",
    "Maintained by a firm that audits Circom for a living."
  ],
  "limits": [
    "Circom only at release.",
    "Depends on the underlying model and your agent setup; results vary run to run.",
    "No validation layer; you triage everything."
  ],
  "fit": [
    "Run zk-skills on every Circom change before an audit, and expect to spend the saved money on human triage."
  ],
  "references": [
    [
      "zk-skills repository",
      "https://github.com/zksecurity/zk-skills"
    ],
    [
      "circom-auditor announcement (2026-08-05)",
      "https://blog.zksecurity.xyz/posts/circom-auditor/"
    ]
  ],
  "category_name": "Cryptography and ZK specialists",
  "page": "https://agentsast.com/tools/zk-skills/",
  "updated": "2026-09-13"
}