{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "d3d99bd82910756f283e475d4b6837c363a91537122f3eaf70731bc6ee7deb34",
  "signature": "1oEp6xW3B/PhpfSfoZQial8NCSPXxEuDK8ri88CP9UQBsyLlPMT4QVHyODDKpf6buHS/haObvi4X++lzFcZ/Cg==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T00:48:57.869Z",
  "slug": "guardrail-structural-engineering-safety",
  "version": "0.1.0",
  "filename": "guardrail-structural-engineering-safety-agent-plugin.zip",
  "bytes": 3727,
  "content_digest": "d3d491e354477273267709b5a15e9b355dad5bd158030a044569be3e3cd69513",
  "content_signature": "QueW1lP6XGzSWYUZKhWcPq5H/e+iKU4vqYVjfeBacH2V0phU4ySST8+AMjSifszN2zUBr6idQxnsevgVY2erBw==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "36ab72b7e9bdb66b7dbaeffe28040189ac76ae490d6ed089c0da3c19a0893436"
    },
    {
      "path": "skills/guardrail-structural-engineering-safety/SKILL.md",
      "sha256": "011e9a721f389fb4b4246a98d1222ab52e8a2140247cf2855abf0820ce9af4fa"
    }
  ],
  "verify": {
    "public_key_url": "https://superagentskill.com/api/public/signing-key.pem",
    "instructions": "sha256 the downloaded .zip, compare with `sha256`, then verify the base64 `signature` as an Ed25519 signature over the ascii sha256 hex string using the public key. An extracted or repacked copy can still be verified via `content_digest` / `content_signature`. Helper: node scripts/verify-package-signature.mjs <file.zip> <signature.json> [public-key.pem]"
  }
}