The output shows the actual content of the first frame, and it has text instead of spaces. Let me check what the first few frames actually contain:

```json
{
  "analysis": "The first frame contains text 'TermZip-ANSI/Tiny-ANSI stream (dual pane)' not spaces. The escape sequences after each character suggest cursor tracking is broken. Let me examine the first frame content directly.",
  "plan": "Check the actual content of the first few frames to understand the data and debug the cursor tracking issue.",
  "commands": [
    {
      "keystrokes": "python3 -c \"\nimport struct\nwith open('/app/frames.tza', 'rb') as f:\n    magic = f.read(4)\n    width, height = struct.unpack('<HH', f.read(4))\n    n_frames, max_bytes = struct.unpack('<II', f.read(8))\n    frame0 = f.read(width * height)\n    frame1 = f.read(width * height)\n    frame2 = f.read(width * height)\n\nprint('Frame 0 (first 200 chars):')\nprint(repr(frame0[:200]))\nprint('\\nFrame 1 (first 200 chars):')\nprint(repr(frame1[:200]))\nprint('\\nDifferences between frame 0 and 1:')\nfor i in range(min(200, len(frame0))):\n    if frame0[i] != frame1[i]:\n        print(f'  Pos {i}: {chr(frame0[i])!r} -> {chr(frame1[i])!r}')\n\"\n",
      "duration": 2.0
    }
  ]
}
```