{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "0b503eb7a360e414f72cc90185c1124e0ac638935abc22b2c4995134707e790b",
  "signature": "ymbiQzftPFHCdMrsCi1QwML9jOIYvnKZ8tfvoabsB5EdY6lTCcH4g/5owNp4yjyBavX07gcuLDuzZnwOA4lRCg==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T00:08:09.620Z",
  "slug": "backend-architecture",
  "version": "0.1.0",
  "filename": "backend-architecture-agent-plugin.zip",
  "bytes": 3430,
  "content_digest": "5b62c7c52b42525209cec784aa523599ff5ab05e8afe84f9c7cd49d59833e453",
  "content_signature": "dnovHxhV3Djs9dgp0tSup81qfZw20ba90NSgnfWhgltGelQNuP8j8yd6YpSAmhvvdIF2QsmyBPzUrrmtS33BAw==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "3b8888a2f65b6cedcea4dd7ae4be137a2243f83fa467fe8ef2e0977042606a14"
    },
    {
      "path": "skills/backend-architecture/SKILL.md",
      "sha256": "5a8b470527a9fc6efbd4bd499f40b95a7a6e6e3d45841ca33dd0dd5cd99e9e6a"
    }
  ],
  "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]"
  }
}