{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "ac69aa097381c906d7f32a59e450888d8cf07faeb0daad291c77e8740cce8049",
  "signature": "8yrC8tAYVQKDHYMQ/dqm8CP88azbBDxvedQj742M+E0ETfSR6gMyIPxwcNmRweZ0gSJBJ5ICI9T95ndmdIxkBA==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T00:29:45.111Z",
  "slug": "a11y-contrast-checker",
  "version": "0.1.0",
  "filename": "a11y-contrast-checker-agent-plugin.zip",
  "bytes": 3503,
  "content_digest": "c1064d2b3199fd59b59318448f45bd421b3471ea06e78223c7678960592e5060",
  "content_signature": "fUd73xt4cEtdruTLxG05PPG2j4++Jo9En2Pbq/ldyKV4naD4/AiKulMT1DwNIngbWD8hOxDEFRI1HAsQ1bxdAA==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "61c22bac309af4fbda36c64ee88251348248e3365174357b8ae2af7653fbcd80"
    },
    {
      "path": "skills/a11y-contrast-checker/SKILL.md",
      "sha256": "8c17291f3db726261c75f2016672aab977b2f1203a6d5a77bb1ab7967280b75d"
    }
  ],
  "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]"
  }
}