{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "46d30ea668db48be91a9c7ce0a3f2512a70cb2ea023f92a5b894e48973ae9ddb",
  "signature": "afCftwQpe8MGTLInMncm2Eqzo13r2Q3RGp+SUi5j+urt6LvCKSCoaJlGBmXBBHMeM/2L+htZpiBawC0UxBimBg==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-23T23:33:35.919Z",
  "slug": "data-visualization",
  "version": "1.0.0",
  "filename": "data-visualization-agent-plugin.zip",
  "bytes": 3550,
  "content_digest": "2fdde87fac4d35057e98ba4fa3b21cdb50d81ad89219ed8df76eaa71bcb9cc1d",
  "content_signature": "7LDhoqBdqnEDgwh/acFlPxc4fXrMFQlZfPMY2GLAo1MdDOmAWJDdNxT5Etnb7XE3WlAiKvrExH+bRV4eA6ukCQ==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "681abfec8658b09dc9761bcbe80d3016b16dce8278708498ddb16bb70dece191"
    },
    {
      "path": "skills/data-visualization/SKILL.md",
      "sha256": "c0f35baf3b3a1391355e1cd0fd272371657f56676f5b14cce15110e121e2b427"
    }
  ],
  "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]"
  }
}