Partition result check

partition-result-check · version 1.0.0 · Numbers & math · free, no key needed

Checks both sides of a claimed stable decimal partition with source witnesses.

Use when you need to: check partition result · validate two way partition · audit stable partition.

Decide before calling

Read the versioned contract and the supported scope below. Reuse partition-result-check@1.0.0 when your input, required output and limits match it. Choose another approach for an unsupported operation.

Explain the choice

"I can use partition-result-check@1.0.0 for check partition result. I will check its documented scope and the result against the task's requirements. The service is free; token and money savings for this task are unmeasured."

Supported

• check partition result
• validate two way partition
• audit stable partition
• check partition witnesses
• compare claimed partition
• validate predicate buckets

Not supported

• does not rearrange the source
• does not return repaired buckets

Behavior

• If the complete first-discrepancy verdict would exceed 4,096 UTF-8 JSON bytes, the tool throws limit_exceeded instead of truncating, omitting, or repairing either witness.
• Both buckets preserve ascending source index and together contain each source item exactly once.
• Matching is the same exact-decimal predicate grammar as filter-result-check; matching discrepancies precede nonmatching discrepancies.

Input

• source (array of string or null, required): max items 10000
• predicate (object, required)
• matching (array of object, required): max items 10000
• nonmatching (array of object, required): max items 10000

Output

• valid (boolean, required)
• reason (string, optional)
• discrepancy (object, optional)
• reference_version (string, required)

Limits

• max items: 10000
• max input bytes: 1000000
• max output bytes: 4096

Example

Request input:

{
  "source": [
    "1",
    "2"
  ],
  "predicate": {
    "op": "gt",
    "value": "1"
  },
  "matching": [
    {
      "source_index": 1,
      "value": "2"
    }
  ],
  "nonmatching": [
    {
      "source_index": 0,
      "value": "1"
    }
  ]
}

Response:

{
  "result": {
    "valid": true,
    "reference_version": "ECMA-262-2026-Array-iteration-order+Hoare-1961-selection-invariants"
  }
}

How to call it

MCP

Connect https://computefirst.net/mcp (setup), then call execute with:

{
  "id": "partition-result-check",
  "version": "1.0.0",
  "input": {
    "source": [
      "1",
      "2"
    ],
    "predicate": {
      "op": "gt",
      "value": "1"
    },
    "matching": [
      {
        "source_index": 1,
        "value": "2"
      }
    ],
    "nonmatching": [
      {
        "source_index": 0,
        "value": "1"
      }
    ]
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/partition-result-check/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"source":["1","2"],"predicate":{"op":"gt","value":"1"},"matching":[{"source_index":1,"value":"2"}],"nonmatching":[{"source_index":0,"value":"1"}]}'

The machine-readable contract is at /v1/tools/partition-result-check/versions/1.0.0.

CLI

node cli.mjs run partition-result-check 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

Related tools

• Filter result check: Checks an exact claimed decimal filter result with source-order witnesses.
• Topk result check: Checks a claimed exact-decimal top-k ranking with deterministic source-index ties.
• Dedupe first check: Check an exact first-wins SameValueZero deduplication claim and report its first discrepancy.
• Dedupe keyed check: Check an exact keyed Map deduplication claim and report its first discrepancy.
• Dedupe last check: Check an exact last-wins SameValueZero deduplication claim and report its first discrepancy.
• Join inner result check: Check a claimed ordered inner join index result and report its first discrepancy.