diegosouzapw/OmniRoute · error · Error

Kimi Connect frame used unsupported flags: ${flags}

Error message

Kimi Connect frame used unsupported flags: ${flags}

What it means

Error "Kimi Connect frame used unsupported flags: ${flags}" thrown in diegosouzapw/OmniRoute.

Source

Thrown at open-sse/executors/kimi-web.ts:121

 *   - `consumed: N` + the parsed frame otherwise
 */
export function decodeConnectFrame(
  buf: Uint8Array,
  byteOffset: number
): { consumed: number; frame: ConnectFrame | null } {
  if (byteOffset + 5 > buf.length) return { consumed: 0, frame: null };
  const flags = buf[byteOffset];
  const len =
    (buf[byteOffset + 1] << 24) |
    (buf[byteOffset + 2] << 16) |
    (buf[byteOffset + 3] << 8) |
    buf[byteOffset + 4];
  // Sign-extend the high bit back to negative when len was read as signed.
  const msgLen = len < 0 ? len + 0x100000000 : len;
  if (msgLen > MAX_FRAME_LEN) return { consumed: -1, frame: null };
  if (byteOffset + 5 + msgLen > buf.length) return { consumed: 0, frame: null };
  if ((flags & ~0x03) !== 0) {
    throw new Error(`Kimi Connect frame used unsupported flags: ${flags}`);
  }
  if ((flags & 0x01) !== 0) {
    throw new Error("Kimi Connect compressed frames are not supported");
  }

  const payload = buf.subarray(byteOffset + 5, byteOffset + 5 + msgLen);
  let message: Record<string, unknown> | null = null;
  if (msgLen > 0) {
    try {
      message = JSON.parse(new TextDecoder().decode(payload));
    } catch (error) {
      throw new Error(
        `Kimi Connect frame contained invalid JSON: ${error instanceof Error ? error.message : "parse failed"}`
      );
    }
  }
  return { consumed: 5 + msgLen, frame: { flags, message } };
}

View on GitHub (pinned to a179ffed5b)

When it happens

Trigger: Thrown at open-sse/executors/kimi-web.ts:121 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of diegosouzapw/OmniRoute@a179ffed5b (2026-08-25). Data as JSON: /api/errors/a6670d61c30f5080. Report an issue: GitHub.