{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "26da42991a373616afc0b6ed47b72482a93f7d402fa8ea8d016107067e008a6b",
  "signature": "FuHhK9USMMrCJsFBVBjIAd+8bWOekbSUQ2fuAagOumcUVYo3XLK0/Yk/LYEUEdpLV34kmf9FxkQ0oBeO3JoNAQ==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T00:07:10.193Z",
  "slug": "model-card-author",
  "version": "0.1.0",
  "filename": "model-card-author-agent-plugin.zip",
  "bytes": 3217,
  "content_digest": "24e85625da1e036c66580a99a107620eea7e13f4a47406189f1145a7830d9c27",
  "content_signature": "wHQLbiwuFJU/WQS0SD5a3r+k20D4/23n67D4Q6xPkAbAim02Oo6sZy2J5pibOnwkyyB0UynuJ0z2EtnlrVZjCw==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "d15963c47b2699726db6d354435ea6288672a2dc5331ea1f58d0db95d9202d72"
    },
    {
      "path": "skills/model-card-author/SKILL.md",
      "sha256": "b6138987ae42851ab821fb29349da432561a716e5967703e8533137c2adca5c6"
    }
  ],
  "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]"
  }
}