{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "236c139d90f1d2cb8b2644b473d6f968d68e2d2d72476046a3dee894f8c88154",
  "signature": "3EoAmptC210njP/9qMXLAjKRSjyn+JAbfXr4N/Yr/QE6lYOZX9sV+YbL15Bi+5W1Q3xb2ISJt04qI4lJ70hGAA==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T00:46:59.337Z",
  "slug": "flashcard-generator",
  "version": "0.1.0",
  "filename": "flashcard-generator-agent-plugin.zip",
  "bytes": 3504,
  "content_digest": "3a9885339d658f8d657cb23a4e451e2a0cd5740425c7fe10f97c2493817e5699",
  "content_signature": "jfAV1CYiveZSKm9ro5IfYhTV8UhA5/FvH35lYBshyrIjDDLULFdZUvkMmEr4qbB6QSY3DLaS64jEtmaQNdJ5DA==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "a1935ab45cd3170dda0dcb68604ad617ab8ead2d1e6f049ce6a2f3e6224b44fe"
    },
    {
      "path": "skills/flashcard-generator/SKILL.md",
      "sha256": "7e9737de5d68f7073276ade1fd95e576f200608e4f6535d6e7611425ddbd8857"
    }
  ],
  "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]"
  }
}