Evidence row 2191191

What was observed

{
  "count": 4,
  "tools": [
    {
      "description": "Fetch the body of a CorpusFetch record. Format 'md' (default, ~1500 tokens) or 'py' (zero-prose stdlib slice, ~300 tokens). Prefer warrant-first: call corpusfetch_fetch_warrant before this.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "format": {
            "default": null,
            "description": "Format: \"md\" (default, ~1500 tokens) or \"py\" (~300 tokens)",
            "type": [
              "string",
              "null"
            ]
          },
          "slug": {
            "description": "Slug of the record",
            "type": "string"
          }
        },
        "required": [
          "slug"
        ],
        "title": "FetchRecordParams",
        "type": "object"
      },
      "name": "corpusfetch_fetch_record"
    },
    {
      "description": "Fetch the ~220-token warrant (precondition seal) for a CorpusFetch record. Fetch this before the .md record. If the seal fails, do not fetch the record.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "slug": {
            "description": "Slug of the record (the URL path segment after /c/ and before .md)",
            "type": "string"
          }
        },
        "required": [
          "slug"
        ],
        "title": "FetchWarrantParams",
        "type": "object"
      },
      "name": "corpusfetch_fetch_warrant"
    },
    {
      "description": "Route a Python exception class to candidate record addresses in the CorpusFetch pillar. Returns warrant_url, py_url, md_url, and fetch_when for each candidate. Fetch the warrant first (~220 tokens); if its seal fails, do not fetch the .md.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "exception_class": {
            "description": "Python exception class, e.g. KeyError, TimeoutError, ValueError",
            "type": "string"
          }
        },
        "required": [
          "exception_class"
        ],
        "title": "LookupExceptionParams",
        "type": "object"
      },
      "name": "corpusfetch_lookup_exception"
    },
    {
      "description": "Route a runtime symptom to candidate record addresses in the CorpusFetch pillar. Returns warrant_url, py_url, md_url, and fetch_when for each candidate. Fetch the warrant first (~220 tokens); if its seal fails, do not fetch the .md.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "symptom": {
            "description": "Runtime symptom key, e.g. UNICODE_HOMOGLYPH_OR_MOJIBAKE, or a DOMAIN_* key",
            "type": "string"
          }
        },
        "required": [
          "symptom"
        ],
        "title": "LookupSymptomParams",
        "type": "object"
      },
      "name": "corpusfetch_lookup_symptom"
    }
  ]
}

What the leaf hashes

{"body":"b4f51c863d77fdd9be9cfd1f0f380410d63e2b1bd7fbe2be54fa851ecae7cc33","id":2191191,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793643994519776,"prev":null,"subject":"6a80923d-3e3f-4bed-aa0d-91119033c586","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-02 (444186 rows).

1. 0x992d1ae4dcd6e99a7bd033fbef408fea0b4af0c61140d7a8e566700d60f0a8ee
2. 0xb7fc4290a4ca4728d705ee5a94e4b59901a9eec58d2eb3a97579bc4739d54d2d
3. 0x731e4a7e805d35f3dd33702162434f20e272bbedf3c3cf1dd11f12ff96479fd2
4. 0x92f560cffb6ccef942be7780c5f59bd2c94f55ebbbbf9fb9e7e7af534137a7e6
5. 0xb96cd81c56f465e9f58071691fde237c2c6da945de26830a9689e9254a90619a
6. 0xdbb18320dba7bbce68f9e3448f6f3dd8ae8a3e2c7d98a23cc6122832c0de7df7
7. 0x0f3105b2e41f53e42c15a0b116be3ad8cffe8e8823629fca8652fb09b7ddf4af
8. 0x0832e88ee613998535c9b221db722f1070584165b59bbc54b4c6afb984a2c846
9. 0xe9aeeecf87565228c450b359699edf47a12afeac7bdf20a3f636c0cab6c4da2d
10. 0x879c3c23ea64c8a421df6ec86ffaa14c595f845cdc2b231f6f3e341a25ad0021
11. 0x158ef7cfdaa60366554edf7596673c783663422b82eba506e8a14b12195814ae
12. 0x60bd288cf68fd865db71df4065677ad3339531f9f1add40d462deb18cd7b0a7f
13. 0x96eeba0e0bb8dfa0ca66d907340b43514f88c7ff36bd9a1299bad5cc5219d2d0
14. 0xc5de092f33d9a5a2d3076d47423feb11b0630cdc080163babf6390bb04568ce5
15. 0x9c91ecb84461aa4cb2a891252746755d862a88fe9bad822700cdb99eaab2edca
16. 0x7731256c7406f95d30aabe3bbcb574b72535b9c28e8eb3db363210761a28a6b9
17. 0x07ad80c0c234ecea379a2f4450dfd0804db049dbc62abe77af6306049ca6b6c2
18. 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
19. 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af