{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "a705b1925fceb7374aa7016b502e334a35f2d3621bd0dcaccd94c271948cad59",
  "signature": "KaMOc2lWUCt6YRZDLzhEgl51x5YrbJw2bmnWOl29fSJ6j0c6IQsYxcioAC9vLr7QnXU+tdiFUkB3F+PXNionBg==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T00:51:20.576Z",
  "slug": "guardrail-mechanical-engineering-safety",
  "version": "0.1.0",
  "filename": "guardrail-mechanical-engineering-safety-agent-plugin.zip",
  "bytes": 3756,
  "content_digest": "a5dc52342673d7508bbc7068f1002b3607cd1793ea5357af6221c8c6848a690e",
  "content_signature": "GOSiyJx2DwuZkVzdQLp0M6JVxMMULO5391Nrf5wMwv81mL+RtEvrlVat7oq/1u/6KghpIIbMyfEdmvsSC48aDQ==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "4b18c48bce7de77d91c6c41a3fbd8393857255e1ac4e437f27682ff960e9defe"
    },
    {
      "path": "skills/guardrail-mechanical-engineering-safety/SKILL.md",
      "sha256": "dd5276fde2fe7b05f3012e0bb98f9d4fb1fa3ebd1116f6f034a75e6b67ae4368"
    }
  ],
  "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]"
  }
}