Function stripFieldsDeep

src/tools/finance/api.ts:15–41

(value: unknown, fields: readonly string[])

 * This reduces token usage while preserving the financial metrics needed for analysis.
 */
export function stripFieldsDeep(value: unknown, fields: readonly string[]): unknown {
  const fieldsToStrip = new Set(fields);

  function walk(node: unknown): unknown {
    if (Array.isArray(node)) {
      return node.map(walk);
    }

    if (!node || typeof node !== 'object') {
      return node;
    }

    const record = node as Record<string, unknown>;
    const cleaned: Record<string, unknown> = {};

    for (const [key, child] of Object.entries(record)) {
      if (fieldsToStrip.has(key)) {
        continue;
      }
      cleaned[key] = walk(child);
    }

    return cleaned;
  }

  return walk(value);
}

function getApiKey(): string {
  return process.env.FINANCIAL_DATASETS_API_KEY || '';