Evidence row 25828

What was observed

{
  "endpoints": [
    [
      "web",
      "https://www.archelps.com/"
    ]
  ],
  "name": "Arc Free Skills",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-10-17T06:51:59.272054Z",
        "status": "active",
        "statusChangedAt": "2026-10-17T06:51:59.272054Z",
        "updatedAt": "2026-10-17T06:51:59.272054Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "100 systems and hardware engineering skills for requirements, interfaces, budgets and verification.",
      "name": "io.github.ArcHelps/arc-free-skills",
      "packages": [
        {
          "environmentVariables": [
            {
              "description": "Absolute path to an existing dedicated folder for inputs and new outputs; do not use your home directory.",
              "format": "filepath",
              "isRequired": true,
              "name": "ARC_FREE_SKILLS_WORKSPACE"
            }
          ],
          "identifier": "arc-free-skills",
          "packageArguments": [
            {
              "type": "positional",
              "value": "arc-free-skills"
            },
            {
              "type": "positional",
              "value": "serve"
            }
          ],
          "registryBaseUrl": "https://pypi.org",
          "registryType": "pypi",
          "runtimeArguments": [
            {
              "type": "positional",
              "value": "--no-config"
            },
            {
              "name": "--from",
              "type": "named",
              "value": "arc-free-skills==1.0.0"
            }
          ],
          "runtimeHint": "uvx",
          "transport": {
            "type": "stdio"
          },
          "version": "1.0.0"
        }
      ],
      "repository": {
        "source": "github",
        "url": "https://github.com/ArcHelps/systems-engineering-skills"
      },
      "title": "Arc Free Skills",
      "version": "1.0.0",
      "websiteUrl": "https://www.archelps.com/"
    }
  },
  "source": "mcp_registry",
  "summary": "100 systems and hardware engineering skills for requirements, interfaces, budgets and verification."
}

What the leaf hashes

{"body":"df81c05c865a8bfdf34ec74be24d21bcf29866ae293d27caa0e285a7cff90aca","id":25828,"kind":"listing","method":"baseline/1","observed_us":1793025355169585,"prev":null,"subject":"mcp_registry:io.github.ArcHelps/arc-free-skills","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0xf139fd1fd0d49a967ca6d40595e31cbf22868285a6988de00fb88afdfaf0f609
2. 0xa2c3788352b4afa039b49e067e3f515ff2b69b49e66d834f2c081213f6cc02ac
3. 0x0672340e5cb9f5c640b55c99a694045c653a6df446da7e87d369948f17d8afc4
4. 0x5f61fa16e83bca011d83ed2d1d8693edd5682286f6f6155edd1edeedc1513c72
5. 0x174cace3230b8d60aac76c5e671124d213ff2753c4a567b6ac538230a548a987
6. 0xd2c27200a71918b275ec7c2af4ed0000545bbf0b4e7f324d3992e1ac081991ee
7. 0x4259baf29954d0304378a887a59adef3068f1681ebf9e54ea32e3e96cd99ef95
8. 0xc99b22339bffe686998fc6f683086e4ecc034cb7435074e703a99393c21aea8f
9. 0xc3596fbad3e4207c4410d395b8a81b3dc359044751f1caefc61e494d58d39d1a
10. 0x7d04371228279440387b9131e1ecd711e15d7ec89ef830b07659d5cf6474b401
11. 0x514d76e971925e71327eba8800da6dbdf3c60a7c174890b0694dc64fd775ac72
12. 0x4d2e94451b5ffc570a23dee9d1525bc305f1009994ffe23d8e2e7d45c60f6209
13. 0xa26f0437cba4d7d64f1cf98bf4f490e1ebb6f66a5e2331537b7ba8b3061084e0
14. 0xd769d41500075835c3b2f9184d223699fb983fd05c29fbcb44d964abc7ee380d
15. 0x68d296b1e00b4899fb83c3fba36fffaefa311eac2903067dbebfe776a12b4a9a
16. 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
17. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae