Evidence row 308264

What was observed

{
  "count": 4,
  "tools": [
    {
      "description": "Retrieve a previously generated artifact (landing, deck, or brief) by slug. Returns HTML.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "slug": {
            "description": "The artifact slug.",
            "minLength": 1,
            "type": "string"
          },
          "type": {
            "description": "Artifact type.",
            "enum": [
              "landing",
              "deck",
              "brief"
            ],
            "type": "string"
          }
        },
        "required": [
          "slug",
          "type"
        ],
        "type": "object"
      },
      "name": "fetch_artifact"
    },
    {
      "description": "Generate a research-grounded brief from a topic and optional source URLs. Persists on stream close at /b/{slug}.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "persona": {
            "description": "Optional persona override.",
            "enum": [
              "saville",
              "scher",
              "rams",
              "weingart",
              "bierut"
            ],
            "type": "string"
          },
          "researchUrls": {
            "description": "Optional sources to anchor the brief.",
            "items": {
              "format": "uri",
              "type": "string"
            },
            "maxItems": 5,
            "type": "array"
          },
          "topic": {
            "description": "The brief subject.",
            "maxLength": 500,
            "minLength": 3,
            "type": "string"
          }
        },
        "required": [
          "topic"
        ],
        "type": "object"
      },
      "name": "generate_brief"
    },
    {
      "description": "Generate a one-of-one pitch deck from a brief and slide count. Persists on stream close at /d/{slug}.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "brief": {
            "description": "The one-paragraph deck brief.",
            "maxLength": 8000,
            "minLength": 10,
            "type": "string"
          },
          "persona": {
            "description": "Optional persona override.",
            "enum": [
              "saville",
              "scher",
              "rams",
              "weingart",
              "bierut"
            ],
            "type": "string"
          },
          "slideCount": {
            "default": 10,
            "description": "Number of slides (default 10).",
            "maximum": 20,
            "minimum": 6,
            "type": "integer"
          }
        },
        "required": [
          "brief"
        ],
        "type": "object"
      },
      "name": "generate_deck"
    },
    {
      "description": "Stream a one-of-one landing page from a one-paragraph brief. Persists on stream close at /p/{slug}.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "brief": {
            "description": "The one-paragraph design brief.",
            "maxLength": 8000,
            "minLength": 10,
            "type": "string"
          },
          "persona": {
            "description": "Optional persona override. Auto-routes if omitted.",
            "enum": [
              "saville",
              "scher",
              "rams",
              "weingart",
              "bierut"
            ],
            "type": "string"
          },
          "referenceImageUrls": {
            "description": "Optional reference images for source-anchored generation.",
            "items": {
              "format": "uri",
              "type": "string"
            },
            "maxItems": 3,
            "type": "array"
          }
        },
        "required": [
          "brief"
        ],
        "type": "object"
      },
      "name": "generate_landing"
    }
  ]
}

What the leaf hashes

{"body":"eb5775276c588587eff957c4b077fc49c8854f673d547061d72bd8a1282d9cab","id":308264,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793058146185904,"prev":null,"subject":"63ae11c7-c1d0-4182-96b2-28c56b29c0c0","subject_kind":"endpoint"}

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. 0x7ce8094ef40c12f37106deb8913af97a9cc6e5fc267975b0684823da7974e582
2. 0xf519759ed59adde25201680a8d16ec27c2d73cfd4571ecec5803988c4ea3b3a8
3. 0xfe6c2484bc123ba43c061d02a155f59ce6baa2e67c150725b21c2970887d7bd0
4. 0x145e040e50cf9f35fdf68521b75e350b00d77d3c572d13c38d0b9795397701b2
5. 0xbf9c0c8c197ba6360890d4c04560a9dad583ca3bc3fa6783b204d984633392cc
6. 0xef67ff104ca7e7dab32309dc6709ed6631c86d61fc3672b7ce23e45c641fb8ab
7. 0xb1c25d2ad813d33d7053705740e7b913959fdd92d8a0840a58433ef7734a6834
8. 0x354bc6b8aeb51bd026e07bfcdee12cbee908417336ed6fb6ca314fa05eafbfc6
9. 0x08b3760a00c7c63570a34f14cb3fff681c9dc8817ae7392edd6927f2dce3759c
10. 0xf0ed0e925a8a7da0329fe426ca59f504fc92f30b2f6f61a5828a859ff9cdb816
11. 0x05b818019343d04f2973b36329a447f88301721891653961b94822610edda553
12. 0x779c77295186b32da6387dfb36d3a76522e7d713472a7cebed7c93529ccc4be6
13. 0x0bffb634300aa5609bddaa79e8d31d7cde36c0a5a4465472f809b9f5287e40d2
14. 0x7721d38652b6444b18e1193824e50490ade04851ce6221771f6e374c4527d80f
15. 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae