{
  "analysis": "xxd is not available, but I can use Python to examine the binary file. The frames.tza file is about 2.3MB. I need to parse its header to understand the dimensions, number of frames, and byte budget.",
  "plan": "Use Python to read and parse the header of the .tza file to understand its structure (width, height, n_frames, max_bytes).",
  "commands": [
    {
      "keystrokes": "python3 -c \"\nimport struct\nwith open('/app/frames.tza', 'rb') as f:\n    magic = f.read(4)\n    w, h = struct.unpack('<HH', f.read(4))\n    n_frames, max_bytes = struct.unpack('<II', f.read(8))\n    print(f'Magic: {magic}')\n    print(f'Width: {w}, Height: {h}')\n    print(f'Frames: {n_frames}')\n    print(f'Max bytes: {max_bytes}')\n    print(f'Bytes per frame: {w*h}')\n    print(f'Raw total: {n_frames * w * h}')\n\"\n",
      "duration": 0.5
    }
  ]
}