Function callback

app/src/utils/ModelManager.ts:102–137

(token: string)

  const MAX_MARKER = Math.max(LLAMA_THINK_START.length, LLAMA_THINK_END.length);

  const callback = (token: string) => {
    buf += token;

    while (buf.length > 0) {
      if (state === 'scanning' || state === 'answering') {
        const idx = buf.indexOf(LLAMA_THINK_START);
        if (idx !== -1) {
          // Emit everything before the marker as answer text
          const before = buf.slice(0, idx);
          if (before) onToken?.(before);
          buf = buf.slice(idx + LLAMA_THINK_START.length);
          state = 'thinking';
        } else {
          // No marker yet — keep a tail in case the marker is split across tokens
          const safe = buf.length > MAX_MARKER ? buf.slice(0, buf.length - MAX_MARKER) : '';
          if (safe) onToken?.(safe);
          buf = buf.slice(safe.length);
          break;
        }
      } else {
        // state === 'thinking'
        const idx = buf.indexOf(LLAMA_THINK_END);
        if (idx !== -1) {
          const reasoning = buf.slice(0, idx);
          if (reasoning) onReasoningToken?.(reasoning);
          buf = buf.slice(idx + LLAMA_THINK_END.length);
          state = 'answering';
        } else {
          const safe = buf.length > MAX_MARKER ? buf.slice(0, buf.length - MAX_MARKER) : '';
          if (safe) onReasoningToken?.(safe);
          buf = buf.slice(safe.length);
          break;
        }
      }
    }
  };

  callback.flush = () => {
    if (!buf) return;