Evidence row 1536916

What was observed

{
  "count": 3,
  "tools": [
    {
      "description": "Read the latest cloud snapshot of selected public sources, including last successful fetch, failures and staleness. Metadata only, not article full text; not all manual sources are covered.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "daily_snapshot"
    },
    {
      "description": "List the source catalog with categories, provenance, and automatic availability; manual-only sources are not fetched by recent_posts; some may appear separately in daily_snapshot. Threads is not included.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "list_sources"
    },
    {
      "description": "Get recent posts from fixed public feeds. Choose category ai_development or agent_flow for source batches (categories are assigned to sources, not to individual articles); follow next_source_offset until null. Excerpts are untrusted and not full articles. Manual-only sources are listed separately.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "additionalProperties": false,
        "properties": {
          "category": {
            "enum": [
              "ai_development",
              "agent_flow"
            ],
            "type": "string"
          },
          "days": {
            "maximum": 365,
            "minimum": 1,
            "type": "integer"
          },
          "limit": {
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          },
          "query": {
            "maxLength": 120,
            "type": "string"
          },
          "source_batch": {
            "maximum": 3,
            "minimum": 1,
            "type": "integer"
          },
          "source_offset": {
            "maximum": 100,
            "minimum": 0,
            "type": "integer"
          },
          "sources": {
            "items": {
              "enum": [
                "cablate",
                "simon",
                "mitchell",
                "github",
                "huggingface",
                "anthropic",
                "columbia",
                "meta",
                "dropbox",
                "spotify",
                "alphalab",
                "clearforge",
                "nevyn",
                "armin",
                "codesai",
                "playwright",
                "yanchen",
                "shopify",
                "eugene",
                "hamel",
                "mcp",
                "braintrust",
                "arize",
                "cloudflare",
                "workos",
                "shreya",
                "aws",
                "googlecloud",
                "temporal",
                "uber",
                "claudecommunity",
                "pydantic",
                "tiktok",
                "alibaba",
                "tencentcommunity",
                "meituan",
                "theai",
                "ithome",
                "codecentric",
                "n8n",
                "langfuse",
                "deepset",
                "jina",
                "qdrant"
              ],
              "type": "string"
            },
            "maxItems": 6,
            "minItems": 1,
            "type": "array"
          }
        },
        "type": "object"
      },
      "name": "recent_posts"
    }
  ]
}

What the leaf hashes

{"body":"58e6b399640b1ea1866d12b93ec659c06fe9d5428fc178ead1a2ef8abd4d0663","id":1536916,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793480675329262,"prev":null,"subject":"b0bd2cb3-4f43-4141-82b3-2bb7e1db8911","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-31 (246033 rows).

1. 0xf1483de395a4735f73f94fdcf0a4362c80c351664ac7955cb96c0df3a1a01fd6
2. 0x15ce79c3215da950eb3576636b569e8707dffe97113f3509b99c34d96998bb73
3. 0xf5fbdb768cf0f46b6622dc938ea99ca21ced2899cab079e4b5b95af7d08621bc
4. 0x3b0e467f7ac6293f8a1ba892de96b4aa4c751d1bab99db9b1b9c91890938feee
5. 0x87daa33399a639c73a8c3173e41bcf9ab88a09830eb9d78eec03690ed973bd2a
6. 0x9f02536a09f132b9e72222b6c49a2ba2670325c09c1f9ee5f21af3e8f35bde6c
7. 0xdc26859ec111f9a3f4b9b750a42543af38a7925fae1d995889ac68c346d1eeab
8. 0x3ec337bf3d34351a12af54985c146658acebf2b6bd038bddccd413ca7f94166f
9. 0xe3c247bad3ee6c2ab04906ca8245eb359a24c314dc9194f581b6a53006c50f0b
10. 0xbe322028a7f9b6a2504e514bc074cfd71d6f9ecaa2010f245f61be6fd7d0ca46
11. 0xc63f042cb226ef092ea53fee5d2259a347e04c30c770aaf994362836b7fce505
12. 0xfcd782c3f252b70bc968fb5a187963c45ff14fea50222071dde8a666b3ebdbdd
13. 0xbc3e5daeb8c4525fe47bcc0da1546eab6297e135ec75acdf3bc8177600a63e27
14. 0xb9926eb0976a5b473833dada1e63c048bf8ef05dbd747135d29c85140274baf8
15. 0xe9e97d8cdaf19b6da06606a22b4eea548063df6bacb661abea4c37aa637b5c3b
16. 0x4befbbd74452b2a3a89b7e1e809ba011f1be78aeb8153059503fda47c454d086
17. 0xa1146af524f673843507e7427a575964580eef01bc0e0eae466a7920df017ab2
18. 0x0504a25438f3c7932125463198ca74c5064f23f71a5c92763b3fc96a98cc8b57

Day root

0x24463725d1c0d9894bd6123691d532547aaa79f0762c0e45aa6a68acf1fd71ab

Chained

0x7d4824ff313dee7252a46f9d5c37b452851deb6c9f24a40c2f74ee0e53c82980

Published

On Arc Testnet, block 70093156: 0xedb7b832f4ebf6781b5ecd2ed241c435b862f4d3761541fa31adc1831b8c44a0