{"id":"dedupe-last-check","version":"1.0.0","description":"Check an exact last-wins SameValueZero deduplication claim and report its first discrepancy.","supported_operations":["check last deduplication claim","validate last duplicate removal","audit last unique result","find first last dedupe error","verify ordered last deduplication","compare claimed last unique list"],"unsupported_operations":["compute and return a replacement claim","deduplicate objects or arrays as scalar values","apply Unicode or numeric coercion"],"semantics":["It verifies retained last occurrences in their original source-index order.","Values are JSON scalars: null, booleans, strings, and safe integers except negative zero; types remain distinct.","A false claim is never repaired; the lowest claim index that differs is returned.","Empty arrays are allowed. Strings are compared exactly without normalization."],"limits":{"max_items":10000,"max_string_bytes":4096,"max_input_bytes":1000000},"pricing":{"status":"unpriced","charge_usd":null},"input_schema":{"type":"object","additionalProperties":false,"required":["source","claim"],"properties":{"source":{"type":"array","maxItems":10000,"items":{"oneOf":[{"type":"null"},{"type":"boolean"},{"type":"integer","minimum":-9007199254740991,"maximum":9007199254740991},{"type":"string","maxLength":4096}]}},"claim":{"type":"array","maxItems":10000,"items":{"oneOf":[{"type":"null"},{"type":"boolean"},{"type":"integer","minimum":-9007199254740991,"maximum":9007199254740991},{"type":"string","maxLength":4096}]}}}},"output_schema":{"type":"object","additionalProperties":false,"required":["valid","reference_version"],"properties":{"valid":{"type":"boolean"},"reason":{"enum":["value_mismatch","length_mismatch"]},"discrepancy":{"type":"object","additionalProperties":false,"required":["path","index","expected","actual"],"properties":{"path":{"type":"string"},"index":{"type":"integer","minimum":0,"maximum":10000},"expected":{},"actual":{}}},"reference_version":{"const":"ECMA-262-2026-SameValueZero-Map"}}},"examples":[{"input":{"source":["a","b","a"],"claim":["b","a"]},"output":{"valid":true,"reference_version":"ECMA-262-2026-SameValueZero-Map"}},{"input":{"source":[1,2,1],"claim":[1,2]},"output":{"valid":false,"reason":"value_mismatch","discrepancy":{"path":"/claim/0","index":0,"expected":2,"actual":1},"reference_version":"ECMA-262-2026-SameValueZero-Map"}}],"execute_url":"/v1/tools/dedupe-last-check/versions/1.0.0/execute"}