Evidence row 299319

What was observed

{
  "count": 5,
  "tools": [
    {
      "description": "A company as context for its programs: what it does, HQ, founding, status/listing, valuation and staff (with dates and provenance), its programs with stage and next milestone, technical approach, open problems, people, recent funding, partners, and its latest news.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "company": {
            "description": "Company slug, e.g. 'spacex', 'figure' (from search)",
            "maxLength": 120,
            "minLength": 1,
            "pattern": "^[a-z0-9][a-z0-9-]*$",
            "type": "string"
          }
        },
        "required": [
          "company"
        ],
        "type": "object"
      },
      "name": "get_company"
    },
    {
      "description": "Survey a whole area of technology: the frontier's fields (with a one-line explainer each) and their programs sorted by importance, with stage and next milestone. Without `frontier` it lists every frontier with its slug. Use `field` to narrow to one field (slugs come back in the result).",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "field": {
            "$ref": "#/properties/frontier",
            "description": "Optional field slug within the frontier, e.g. 'geothermal'"
          },
          "frontier": {
            "description": "Frontier slug, e.g. 'energy', 'robotics', 'space', 'ai'. Omit to list all frontiers.",
            "maxLength": 120,
            "minLength": 1,
            "pattern": "^[a-z0-9][a-z0-9-]*$",
            "type": "string"
          },
          "perField": {
            "description": "Programs per field (default 4, max 10; default 15, max 25 when a field is given)",
            "maximum": 25,
            "minimum": 1,
            "type": "integer"
          }
        },
        "type": "object"
      },
      "name": "get_frontier"
    },
    {
      "description": "Everything known about one technology program: goal, development stage, current status, next milestone and slips, milestone history, current obstacles, physics limits, how it works, key specs, upcoming events and its most important dated news with source links. Identify it by `frontier` + `program` slugs (from its URL /<frontier>/<program>, or from `search`), or by `company` + `program`.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "company": {
            "$ref": "#/properties/frontier",
            "description": "Company slug, e.g. 'spacex' (alternative to frontier)"
          },
          "frontier": {
            "description": "Frontier slug, e.g. 'space', 'robotics' (from search results or the page URL)",
            "maxLength": 120,
            "minLength": 1,
            "pattern": "^[a-z0-9][a-z0-9-]*$",
            "type": "string"
          },
          "program": {
            "description": "Program slug, e.g. 'starship', 'figure-03'",
            "maxLength": 120,
            "minLength": 1,
            "pattern": "^[a-z0-9][a-z0-9-]*$",
            "type": "string"
          }
        },
        "required": [
          "program"
        ],
        "type": "object"
      },
      "name": "get_program"
    },
    {
      "description": "Recent dated news (tests, launches, funding, delays, papers) with a short summary, the story page and the original source URL. Optionally filter by frontier, company, or program (program needs company or frontier). `sort: top` ranks by importance instead of recency.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "company": {
            "$ref": "#/properties/frontier",
            "description": "Company slug, e.g. 'spacex'"
          },
          "frontier": {
            "description": "Frontier slug, e.g. 'energy'",
            "maxLength": 120,
            "minLength": 1,
            "pattern": "^[a-z0-9][a-z0-9-]*$",
            "type": "string"
          },
          "limit": {
            "description": "Max items (default 10, max 20)",
            "maximum": 20,
            "minimum": 1,
            "type": "integer"
          },
          "program": {
            "$ref": "#/properties/frontier",
            "description": "Program slug (with company or frontier)"
          },
          "sort": {
            "description": "latest (default) or top (most important first)",
            "enum": [
              "latest",
              "top"
            ],
            "type": "string"
          },
          "window": {
            "description": "Time window (default month)",
            "enum": [
              "day",
              "week",
              "month",
              "quarter",
              "all"
            ],
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "latest_updates"
    },
    {
      "description": "Find technology programs (e.g. Starship, Figure 03, a fusion reactor), companies and frontiers by name or keyword. Use this first when you only have a name or topic; it returns the slugs `get_program` / `get_company` / `get_frontier` take, plus page URLs.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "limit": {
            "description": "Max results per type (default 6)",
            "maximum": 10,
            "minimum": 1,
            "type": "integer"
          },
          "query": {
            "description": "Name or keywords, e.g. 'starship', 'humanoid robot', 'solid-state battery'",
            "maxLength": 100,
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "search"
    }
  ]
}

What the leaf hashes

{"body":"4d7393bc3804bf5eeff2a8f48288f31cbbb4129d6722f268a0eee10350af0036","id":299319,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793052749095852,"prev":null,"subject":"43585fea-a1d2-4fa3-81b2-01510257d36a","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. 0x4bf6d4c8dee9b4c6a7e11c6beb523d3d9939c5a6ac6b6930bd708855c71c4e30
2. 0x2bbc0b143607733b67b33a208fbd7d3bf2c9e3185eda7e24a55e62dc1d0284d4
3. 0x3661d75bf504fc25c5e829e16c0c3eb4d157ae99afb625aab7d6d602792291c8
4. 0x90374c61b0e23a5ec2582f27cdf581fdcdad261b6c06233086187f62d10b901b
5. 0x35e3d872b288fea8c58971c0c4f5e1ae41d435f93735260c5bac7f41c5a8885d
6. 0x0fd568dade10630e21825d65f4c11881e6a12a86efe1c8feb5c17815c00520ea
7. 0xccc4510c3e40500c4f8f37adc2b08f2196838388bc87f18d07faa4148b8a2e9d
8. 0x171e9bf97a80e35aa986f01b3b0131e545e5419d985c8c9697fd7257bf8ed30a
9. 0x43fb894317b82ea814d4ab3f7f36fe19b7af25dc52af20c231f002838f5753f9
10. 0x5e5595f403ae2f6e6bc3afc146009e77398a17f4b51a39a54f14d6f8a2b599cb
11. 0x8e1dce5acc3a34df8e5fee91635037c0b87740a313eb455495b8fa04b41070e7
12. 0x67ae8949b58cb7b0dd4cfa0f9aeeee715e0ae6b87fef0ba46483bbf280004c53
13. 0x1ffd24a0422348bb2305058cc138e276511e1c074bf8139af5b773941f0e5de2
14. 0x88e326a39b26e2c125306c9d3805d14398ace088bba9a2a0aa376b811cfb201a
15. 0x2be1e80e065dd6b2cc75a7142be22225acd144ac975d70bf24b4f01fd76dc497
16. 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae