Function parseGeneratorMetadata

src/windsurf.js:927–967

(buf)

 * usage is not counted again.
 */
export function parseGeneratorMetadata(buf) {
  const fields = parseFields(buf);
  const metaEntries = getAllFields(fields, 1).filter(f => f.wireType === 2);
  if (metaEntries.length === 0) return null;

  let inputTokens = 0, outputTokens = 0, cacheReadTokens = 0, cacheWriteTokens = 0;
  let found = false;

  for (const entry of metaEntries) {
    const gm = parseFields(entry.value);
    const chatModelField = getField(gm, 1, 2); // chat_model
    if (!chatModelField) continue;
    const cm = parseFields(chatModelField.value);
    const usageField = getField(cm, 4, 2); // usage
    if (!usageField) continue;
    const us = parseFields(usageField.value);
    const readUint = (fn) => {
      const f = getField(us, fn, 0);
      return f ? Number(f.value) : 0;
    };
    const inT = readUint(2);
    const outT = readUint(3);
    const cacheW = readUint(4);
    const cacheR = readUint(5);
    if (inT || outT || cacheW || cacheR) {
      inputTokens += inT;
      outputTokens += outT;
      cacheWriteTokens += cacheW;
      cacheReadTokens += cacheR;
      found = true;
    }
  }
  if (!found) return null;
  return {
    inputTokens,
    outputTokens,
    cacheReadTokens,
    cacheWriteTokens,
    entryCount: metaEntries.length,
  };
}

// ─── Cascade response parsers ──────────────────────────────