{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "74225a654d1f7426f4c7d5be216019fd4786df4e8e912eca8e6df2b3ab6aeec5",
  "signature": "1xjrZbI/MZxLDxHEP0JGhNHnKxdZiitkPWnJnrOORNfCVn6RWj36Mhb9J4uy+iFIwfXZDVoYIhM+pFh+qwhJBQ==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T01:07:37.890Z",
  "slug": "pm-product-analytics",
  "version": "0.1.0",
  "filename": "pm-product-analytics-agent-plugin.zip",
  "bytes": 3920,
  "content_digest": "d23f57f2773b5d31d2dda5760d0ca4bf70f0fa6b385ed04a4e3f832291dd2295",
  "content_signature": "2K2bULlt1mzkPmA3scmbfPN8VD29c73WRTgLZqBR67h4N5NionYhKFQtwd3JTDV9yDt6qOHxJAA8bDiHrVwjDA==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "807d64056e3dc64f324ac280c384a47157b1cdb5b58e814935591c103ba5941f"
    },
    {
      "path": "skills/pm-product-analytics/SKILL.md",
      "sha256": "1964b1545f18622e0a92df7f8a0a7370375b47e0cf34dc274b5597f2f760288e"
    }
  ],
  "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]"
  }
}