{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "60a490c4ca7a7010b86afa92439f282345c1d37c0cbe08a8da141f53839f4f62",
  "signature": "zXI4Cox7IjkZbP64H0eul3Je2DAVKqexYbOiconhDkUM1PE1bk7AywLUSuUVYTU+RWc5+2kcOB0avn8kJe0XAQ==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T01:07:37.658Z",
  "slug": "writing-plans",
  "version": "0.1.0",
  "filename": "writing-plans-agent-plugin.zip",
  "bytes": 3206,
  "content_digest": "a0e3c10fac09d5636845b657c342288560b31e7b331d296b9f2a8b6505341bb4",
  "content_signature": "a/wowTCoJecBuTh+xGHeLmCiUo/iUGtqfK6eAz2JebZEGXMLkTsYQ/K42KaT1cUUTu/3ZAOuoCh0xaR4KQCRAA==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "cdcb6596804b7c59060ccf5e9f066408821c2b4c6dbfc78c91ebe4f8165bbbfb"
    },
    {
      "path": "skills/writing-plans/SKILL.md",
      "sha256": "6752340a9add1bd9de1059d3c1110fde8d7bf59dba4edf38516d36f03e3148e0"
    }
  ],
  "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]"
  }
}