{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "00927b6b5469056dee964b8bed5686c913f8998b10d030a77f0e0df6311a19b3",
  "signature": "RNvFt0920hoOlGP/eFrXujQrT8jMz92lloRQWehsT4ppWmgISADNRiigjRey+liaBHS3IXSoktIC0HSpXkBhCw==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T00:43:16.063Z",
  "slug": "proposal-author",
  "version": "0.1.0",
  "filename": "proposal-author-agent-plugin.zip",
  "bytes": 3436,
  "content_digest": "555f9f2be5ba0f0579569fbbaf062f3a4f85973def2e32cd15d5267271b5cd46",
  "content_signature": "DC9zw7jdsnvALEN8O1IKefWH2h6DOChv53pYAUpiBCltv75Y8ilAkcmtNgokz4eh3Z9fdC5nSFvl8tWJyRBGAA==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "58a0701be1ed37141dcf414b7a0da75a6cf66d31e6f751ac2bbc85ab5ea8eb04"
    },
    {
      "path": "skills/proposal-author/SKILL.md",
      "sha256": "2046641b13b3e14fab50d37075830aa7f586cfbb168fee27a18b7f0c054a8f10"
    }
  ],
  "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]"
  }
}