{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "66a272c2280c70ac475d5e2539a653b298f3bff0e7bd7504c4f7abbe5306a074",
  "signature": "yyLv8skiXLiWdNca7jj7yDZDynURkPtB1lJhyRh0Z33+xJKrenQB5dA6gPbDNHfxIWkB7F38oDXTq3l7qfY3DQ==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-23T23:28:24.759Z",
  "slug": "market-sizing",
  "version": "0.1.0",
  "filename": "market-sizing-agent-plugin.zip",
  "bytes": 3387,
  "content_digest": "8e4a7cb3496f2fa1ee42f996dd3b2e851d7a61a64e36f24429db5e1c4446d147",
  "content_signature": "TSjFZQl6utRBXewbN1hoKy9KGf9eoVKgXmbiwpQHbEzOp2aZGA4NBq8wRb+yt/ILEdyQVAhDhUJhD6ozUfSzAQ==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "65de312ce083e91a51c0ded78d30b6b07a1495b94de9b5fa084dce0902dd2b2e"
    },
    {
      "path": "skills/market-sizing/SKILL.md",
      "sha256": "0be52d795d97fbf1a455f0861d0ebc7592a28483e3a81102ab7ca3073d1c1fa3"
    }
  ],
  "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]"
  }
}