Coding-Medium-Flatten-Deep

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 flattenDeep(arr). Recursively flatten a nested array of any depth into a single-level array, preserving element order.

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

{
  "function_name": "flattenDeep",
  "timeout_ms": 100,
  "test_pass_threshold": 1,
  "partial_credit_threshold": 0.5,
  "tests": "[hidden executable tests]"
}