Coding-Hard-Json-Patch

The model receives the prompt (and optional system message). The run uses scorer javascript_function_tests with the JSON configuration below. Pass/fail and partial credit are determined entirely by that scorer against the model output; no human grading.

Return JSON only with a string field named code. The code must be dependency-free JavaScript, define the requested function in the top level or module.exports, and include no markdown, imports, require, timers, network, filesystem, eval, or placeholders.

Implement function applyJsonPatch(doc, operations). Apply a small JSON Patch subset without mutating the original document. Support operations with op add, replace, and remove, using slash-separated paths for object properties and array indexes. Return the patched document.

Your JSON must look like {"code":"function applyJsonPatch(...) { ... }"}.

{
  "function_name": "applyJsonPatch",
  "timeout_ms": 220,
  "test_pass_threshold": 1,
  "partial_credit_threshold": 0.5,
  "tests": "[hidden executable tests]"
}