Evidence row 293443

What was observed

{
  "count": 8,
  "tools": [
    {
      "description": "Identify an object from sizes you measured (an outline, a bore, a pin, a flange) when you don't know its name; use find_geometry when you do. Each size is compared, within tolerance_mm, against the object's overall size in any order and against its exact feature sizes (bores, slots, pins, size tables). Ranked: all overall sizes matching first, then the most matching features; up to 25 results, each saying which numbers matched where. No match is not an error: widen tolerance_mm or file request_object.",
      "inputSchema": {
        "properties": {
          "category": {
            "description": "Optional exact category from list_categories to narrow the search.",
            "type": "string"
          },
          "sizes_mm": {
            "description": "One to four sizes in mm, e.g. [40, 80] for a profile, [10.5] for a bore.",
            "items": {
              "type": "number"
            },
            "maxItems": 4,
            "minItems": 1,
            "type": "array"
          },
          "tolerance_mm": {
            "description": "Allowed difference per size, default 0.5. Use about 0.2 for caliper readings of machined parts, 1 for rough measurements.",
            "maximum": 5,
            "minimum": 0,
            "type": "number"
          }
        },
        "required": [
          "sizes_mm"
        ],
        "type": "object"
      },
      "name": "find_by_dimensions"
    },
    {
      "description": "Search the library of exact real-object geometry (fasteners, extrusion, sanitary fittings, electronics boards, phones and devices, motors, mounts, tri-clamp caps, inserts, pistons, linkages and frames) by name or keyword. Use it when you know what the thing is called; use find_by_dimensions when you only have measurements, list_categories to learn filter values. Every query word must appear in the object's name, aliases or tags (case-insensitive; '80-40', '80x40' and '8040' match alike); filters narrow with AND. Returns 20 summaries per page (limit up to 100) with total and next_offset for paging; an empty result means nothing matched every word, so retry with fewer words.",
      "inputSchema": {
        "properties": {
          "category": {
            "description": "Exact category name from list_categories, e.g. 'Hardware'.",
            "type": "string"
          },
          "free_only": {
            "description": "Only objects whose files are free to download.",
            "type": "boolean"
          },
          "group": {
            "description": "Exact group name within a category from list_categories, e.g. 'Fasteners'.",
            "type": "string"
          },
          "kind": {
            "description": "modern/vintage = a product; standard = a part defined by a standard; hardware = a generated part with free files.",
            "enum": [
              "modern",
              "vintage",
              "standard",
              "hardware"
            ],
            "type": "string"
          },
          "les_only": {
            "description": "Only parts used in Long Earth Society builds.",
            "type": "boolean"
          },
          "limit": {
            "description": "Page size, default 20.",
            "maximum": 100,
            "minimum": 1,
            "type": "integer"
          },
          "offset": {
            "description": "Start index; pass next_offset from the previous page.",
            "minimum": 0,
            "type": "integer"
          },
          "query": {
            "description": "Keywords, e.g. 'M3 heat set insert', 'tri clamp ferrule 2in', 'raspberry pi 5'. Omit to list by filters alone.",
            "type": "string"
          },
          "year": {
            "description": "Release year for products: '2023', '2020s' or '2010-2019'; objects without a year are then excluded.",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "find_geometry"
    },
    {
      "description": "Return the contents of one free file so you can read or modify the geometry directly: STEP and DXF as UTF-8 text, STL as base64; units are millimetres. Use it after get_free_files gives you the file name; use get_free_files instead when a download URL is enough. Files over 600 KB are not inlined: you get size_bytes and the URL. An unknown file name returns an error listing the valid names.",
      "inputSchema": {
        "properties": {
          "file": {
            "description": "A file name exactly as get_free_files lists it, e.g. '4080-100'.",
            "type": "string"
          },
          "format": {
            "description": "Default step. DXF exists only for 2D sections such as extrusion profiles.",
            "enum": [
              "step",
              "dxf",
              "stl"
            ],
            "type": "string"
          },
          "object": {
            "description": "Slug as returned by find_geometry or find_by_dimensions, e.g. '4080-aluminum-extrusion'. An exact name or alias also resolves.",
            "type": "string"
          }
        },
        "required": [
          "object",
          "file"
        ],
        "type": "object"
      },
      "name": "get_file_content"
    },
    {
      "description": "Return only the mating features of one object: each hole, pin, pocket, slot or socket that meets another part, its exact size, what it mates with, and its fit class (press, slide, run, socket, clamp, designed). Use it before preparing a part to print or machine, or when get_geometry's full sheet is more than you need. All sizes are exact with no clearance: add your process allowance to press, slide, run and socket features only; designed and clamp features stay as drawn. Objects without mating features return an empty list.",
      "inputSchema": {
        "properties": {
          "object": {
            "description": "Slug as returned by find_geometry or find_by_dimensions, e.g. '4080-aluminum-extrusion'. An exact name or alias also resolves.",
            "type": "string"
          }
        },
        "required": [
          "object"
        ],
        "type": "object"
      },
      "name": "get_fits"
    },
    {
      "description": "List direct STEP and STL (and DXF where present) download URLs for one object's free files, licensed CC BY 4.0 (credit 'Xem Studio'). Use it when you need files rather than dimensions (get_geometry) or file contents (get_file_content). An object with no free files returns an empty list and a note pointing to its public sources; that is not an error.",
      "inputSchema": {
        "properties": {
          "filter": {
            "description": "Keep only files whose name or note contains this text, e.g. 'm3x10' or '2in'.",
            "type": "string"
          },
          "object": {
            "description": "Slug as returned by find_geometry or find_by_dimensions, e.g. '4080-aluminum-extrusion'. An exact name or alias also resolves.",
            "type": "string"
          }
        },
        "required": [
          "object"
        ],
        "type": "object"
      },
      "name": "get_free_files"
    },
    {
      "description": "Read the full dimension sheet of one object: overall size, mounting holes, notes, size tables, mating features, related objects (call get_geometry on their slugs to traverse), FAQ, and every public CAD source with its license. Use it to answer how big something is, where its holes are, or what it fits. It never returns download links: use get_free_files for those, get_fits when you only need the mating features. Unknown objects return an error with a hint to search first. Objects with a planned or finished Xem scan also list paid_offers: price in USD, the page where a person can buy the files, and the x402 URL an agent can pay itself once the scan exists; this tool never charges anything.",
      "inputSchema": {
        "properties": {
          "object": {
            "description": "Slug as returned by find_geometry or find_by_dimensions, e.g. '4080-aluminum-extrusion'. An exact name or alias also resolves.",
            "type": "string"
          }
        },
        "required": [
          "object"
        ],
        "type": "object"
      },
      "name": "get_geometry"
    },
    {
      "description": "List every category and the groups inside it with object counts, plus the catalog version. Use it to get the exact category and group names that find_geometry and find_by_dimensions filter on; it takes no input and returns the whole tree in one call.",
      "inputSchema": {
        "properties": {},
        "type": "object"
      },
      "name": "list_categories"
    },
    {
      "description": "File a request for an object the library lacks so it gets added. Use it only after find_geometry and find_by_dimensions find nothing suitable. Each call stores one new request (calling twice files two) in the owner's private inbox; nothing else changes and nothing is published. Stored: the text, the optional contact and the time, with no IP address. Requests set the order objects are added; there is no reply unless a contact is given. At most 300 requests a day are accepted site-wide.",
      "inputSchema": {
        "properties": {
          "contact": {
            "description": "Optional email or handle for a reply; include only if the person asks to be contacted.",
            "type": "string"
          },
          "text": {
            "description": "Plain description: exact model or part number if known, what it must fit or mate with, which features matter, and any sizes already known. 3 to 4000 characters.",
            "type": "string"
          }
        },
        "required": [
          "text"
        ],
        "type": "object"
      },
      "name": "request_object"
    }
  ]
}

What the leaf hashes

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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. 0x18781fb647ffb258a6c2d43923af6ca44c988494118c81891a6a7cec5b40887d
2. 0x01620d621f6aa4d7ed7279bd5395b20bb9f8e2d43f8cd9bc4ba6947145c4b110
3. 0x974cb25ec47d1ca4a8e498e7c9a33491b8e0c8377345a6c7cf0fa2eb798bf0f1
4. 0xfc5665eda37918df2a4d0d2eba81375610bea58a0965aa7f932c245354a36dbc
5. 0xf12eaba1fdf59c78f4cac04c5264bbe72ad1d0d74e9528a7daf51ab263f2c6ad
6. 0x413aae05da37475bbadd383eddd421f716f68893cf4ec74b3595f7a2c6102d05
7. 0x7da96798ce39f8e2620390837ccad0b13cb3e78e7b8a0b993d6ee5585e7e904e
8. 0x0119283e2cec12aaa4069ce28d337194c55b4bdc1faa814e97f8c75e4ea126c5
9. 0x30ed476c712afaf21f7cd3d819a24a690f5af97c643d7c65915b456206f5148e
10. 0x4b181a898f514ff9cb15440f5fc1c2a2f938b6e95da8f6b6ddad9ea761c0d44a
11. 0x04d98d8716f171bd2264c6c49606521f410107287c5094c713f72cdf2fe1e1ed
12. 0x15eab8feed5b3f08165d63b9f1aed508c0624966a05349e051f86f0c188707b5
13. 0x32f46c5f73ecbfd4f770f7f760a79bee2afed4b3e7572fa882b3e7dce8df4356
14. 0x770e4376196188c7fc9ec40f8e218dc0d1cb92bba5fe0425a0edce27ca9a997f
15. 0x60582ab4b41e72eb70eb0bce07fbf0fb4d2b62a8bad5be50f5d16d511adc746c
16. 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae