{
  "analysis": "I can see this is a progress bar animation. The changes are minimal: a counter increments on row 2, a progress bar fills with `##` characters, and a spinner character changes. This is perfect for delta encoding.",
  "plan": "Let me analyze more frames to understand the full pattern of changes, then design an efficient encoding strategy that uses cursor positioning to only update changed cells.",
  "commands": [
    {
      "keystrokes": "python3 -c \"\nimport struct\nwith open('/app/frames.tza', 'rb') as f:\n    f.read(4)  # magic\n    w, h = struct.unpack('<HH', f.read(4))\n    n_frames, max_bytes = struct.unpack('<II', f.read(8))\n    \n    # Read all frames\n    frames = []\n    for i in range(n_frames):\n        frame_data = f.read(w*h)\n        frames.append(frame_data)\n    \n    # Count changes between consecutive frames\n    total_changes = 0\n    for i in range(1, min(20, n_frames)):\n        changes = sum(1 for j in range(w*h) if frames[i][j] != frames[i-1][j])\n        total_changes += changes\n        print(f'Frame {i-1} -> {i}: {changes} changes')\n    print(f'Avg changes (first 20): {total_changes/19:.1f}')\n\"\n",
      "duration": 1.0
    }
  ]
}