{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "963e236f3e4fd2aab0a9d5519e04847f72a533aed07e3123a414d37131545dd8",
  "signature": "eYfjIw7eE670vFEePFgjtesBvxZ7IXXJrWJ5mwcksylk5rBXNiNqBSlBIlmdzdHVTMCjldrknQlVIh/Ta8ObBQ==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T01:07:15.130Z",
  "slug": "pl-pmf-validation",
  "version": "1.0.0",
  "filename": "pl-pmf-validation-agent-plugin.zip",
  "bytes": 4282,
  "content_digest": "127b79d14d0b32de344b5b666fef829228f1fbdaa066213b2d29b19aadaba106",
  "content_signature": "dRXy6NVXiRdeo/P3NbagbSwGc6SRNpBuNNFLQiWpraEwqt8a2esEiWdGcVKM4hOVoBM8GKD7VrxfitW84D4zDA==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "1c82bd2c594b940f0ad4aad8cea02b98964f9bc9e298a42bad9c0b70306896b4"
    },
    {
      "path": "skills/pl-pmf-validation/SKILL.md",
      "sha256": "fe45af9c3723c5b1237de6b39ac82b604bf8c5e4fb769f3883a06680c9899a87"
    },
    {
      "path": "skills/pl-pmf-validation/references/examples.md",
      "sha256": "9726c5def208c03bfa335e734c3c096fb0685ce89fd2097c9d2f4a4e19890e48"
    }
  ],
  "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]"
  }
}