{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "392a72a7581097b41d81d6c1eb570e01aeeac649e54755f6b40958aa430658fb",
  "signature": "A1U3zPrlHJ83cpJJbD/EaOX+fvqBS+ygR3pA2auoC7wndSt7X5ysfU+CVTkeT+l5pw+Oq475vKVxq1ja+3MtDA==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T02:02:18.503Z",
  "slug": "pm-product-discovery",
  "version": "0.1.0",
  "filename": "pm-product-discovery-agent-plugin.zip",
  "bytes": 3887,
  "content_digest": "d83758e9e0a01034d1dbdf845fedaf0abf78a1f671a93581deeb9d08d6a3b1e3",
  "content_signature": "4ZwkClSI68AYKVAfkW5UKR0DfixeiNgBeUb7od3qWkNkjR41F06X/ngbkL7n8Fw9vFrTyEmeDah7Ox/GkM3xCQ==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "66d5440b8a7ae67b455c6f55eb9e9e7e3767c483b66b48baa8589b6201530bcf"
    },
    {
      "path": "skills/pm-product-discovery/SKILL.md",
      "sha256": "ca1a5b6abc07302d94c1b5b19c4d7b123615e94083e8b5cd0a475957d489aa85"
    }
  ],
  "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]"
  }
}