Evidence row 3441933

What was observed

{
  "count": 4,
  "tools": [
    {
      "description": "Fetch the full resolved experience record. Format 'md' (~1500 tokens, includes reasoning) or 'py' (~300 tokens, zero-prose executable invariants).",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "format": {
            "default": null,
            "description": "Format: \"md\" (default, ~1500 tokens) or \"py\" (~300 tokens)",
            "type": [
              "string",
              "null"
            ]
          },
          "slug": {
            "description": "Slug of the record",
            "type": "string"
          }
        },
        "required": [
          "slug"
        ],
        "title": "FetchRecordParams",
        "type": "object"
      },
      "name": "corpusfetch_fetch_record"
    },
    {
      "description": "Fetch the compact ~220-token precondition seal for a resolved record. Always call this before fetching the full record. Check the seal; if it fails, the record does not apply to your current state.",
      "inputSchema": {
        "$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": "Look up deterministic operational experience for a Python exception class (e.g., KeyError, TimeoutError). Use this when you encounter an unexpected runtime error and need an empirically verified boundary decision. Returns candidate addresses.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "exception_class": {
            "description": "Python exception class, e.g. KeyError, TimeoutError, ValueError",
            "type": "string"
          }
        },
        "required": [
          "exception_class"
        ],
        "title": "LookupExceptionParams",
        "type": "object"
      },
      "name": "corpusfetch_lookup_exception"
    },
    {
      "description": "Look up operational experience for a specific runtime symptom (e.g., UNICODE_HOMOGLYPH_OR_MOJIBAKE). Use this when facing an ambiguous failure state or an unbounded reasoning loop. Returns candidate addresses.",
      "inputSchema": {
        "$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":"abfc68668d11590beafa77cb694579a8ad550ce4abc9e3ca7a7692a630eab829","id":3441933,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793904713942158,"prev":2191191,"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 2026-11-05 (322504 rows).

1. 0xbe49484a8c335bf82fa89511549fdf08727eaf04fd863a3453d182fce08eab91
2. 0x9547e525a93cc1f1b932c8314d5861c058c5ec6fb494b67ce60cf3f996f7fcc2
3. 0x7a18901bb45144030eb6126045517c9f7a360b54d5c689092777f8dfb3a9484e
4. 0x6ecb7a2900538be4432e3af5de566ddbe96362fd8a5f39e959f85cd832165088
5. 0x5394810a68d918534b45d3f0e037e82f755e89ee953d26bdbfcd1c9f73c84df0
6. 0x6c9f801924c2ab557ac77403eefaa763ee187db65e7e541405ee7a2da8225b52
7. 0x3b6abeee320b1ec852a609d4bfeefbb53f1c09825dd4800434b5d72e87ddfe77
8. 0x6b313dfdb4c72cc72f8c866625c64c6b7280d28c7d3344876de417a6779a7702
9. 0xb55a79d478a843cf9ec7ae7f70ba9ccad9ff329a213b30ece65802608aa0b71a
10. 0x8f5d523014376e267be439dc43ab0c95b3754f4654a5d930b536d69ccd03104c
11. 0x46fef53921268250f4dc95952388266ccc2e01b21e4a10c424299a84f4438233
12. 0x68fa8a360833acd31855f6f46f3c4f0e5a9c24a0b942bd75369b4b5ca085fe02
13. 0x0094125755cf4d53859179bd3542321fe895e3ac40c3c2ffe5b2c3139ea38467
14. 0x876741791494e92b6f75db13043598085795215fa5ba6b39a6d004eb9c7632fa
15. 0xbce07c8bedec3bbed9a22d7f4e8aca180f479ed562779a14791c5e82f052e9c8
16. 0x308711d37f87ac2fb79802c45aba249411861d2d093068d1718f039b506d2a02
17. 0x25f3843b1f8d3ded906cf440101c0137d8f897b0b72f946f0d5bc12c3da6b136
18. 0xfb4e1f4d701ae273fb0cd57757f659e327608e5561a752b2099b436618493c84
19. 0xf72fe7c4860b9addb17aac4a00b8afc2f8085836173f10f31697c3d192df119b

Day root

0x9f0215efb0252701dc86d5600ce95f276cccc716759bf112525ae863f698d128

Chained

0xc54ddff800630c6cd9656f99e7d6a61adce99bf1cea37121600598b0a9a720d2

Published

On Arc Testnet, block 70942081: 0x88f612ad94ca63af4e4e9faab9f34b665b41f03828afac1571ad013cc62bba94