{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "289d19c16430e18fb7e497d47f799671a79b47eb0732366591c41721ab8c80e4",
  "signature": "AHizvIsq1T7o8fmDEzywP6aDmkYYtxYr9MfpY57WjAKjwIkQajmjYSKTlqQKlfT2avk4awTTwKSKBXMs7w/eDA==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T00:51:10.563Z",
  "slug": "retail-loyalty-designer",
  "version": "0.1.0",
  "filename": "retail-loyalty-designer-agent-plugin.zip",
  "bytes": 3551,
  "content_digest": "52a8c24f7e6de1eb9955fdff5ac3f1ff6a7ee52d866b1148d4ebc5fd62f50e06",
  "content_signature": "pB6IKafcDMKrHSXrC+0xNCdee+xIsXc5FAIOv0teo+H9XOmuE2Qc33HC/M2KzYGr+d7u8xESi39YdTYftIpTCA==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "2f92b679a56a59819280ffa1c33c3b999386ad9180b752f2c8ab61b52a0afd4c"
    },
    {
      "path": "skills/retail-loyalty-designer/SKILL.md",
      "sha256": "b1d74c95748771f903ad19230da5791f6abac0960c65b44693c56b96122296fa"
    }
  ],
  "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]"
  }
}