Let me analyze the cursor movements more carefully. After frame 0 with 901 changes, the cursor position matters:

```json
{
  "analysis": "Frame 0 has 901 changes, then frames 1-3 have only 4 changes each at specific positions. The cursor position after frame 0 affects subsequent movements. I need to optimize the navigation costs.",
  "plan": "Analyze the exact cursor position after frame 0 and optimize the navigation costs. Also check if there are patterns in change positions that can be exploited.",
  "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    frames = [f.read(width * height) for _ in range(n_frames)]\n\n# Find runs in frame 0\nprev = b' ' * (width * height)\nframe = frames[0]\nruns = []\ni = 0\nwhile i < width * height:\n    if prev[i] != frame[i]:\n        start = i\n        while i < width * height and prev[i] != frame[i]:\n            i += 1\n        runs.append((start, i - start))\n    else:\n        i += 1\n\nprint(f'Frame 0: {len(runs)} runs')\nprint('First 20 runs:')\nfor j, (start, length) in enumerate(runs[:20]):\n    row, col = start // width, start % width\n    print(f'  Run {j}: row={row}, col={col}, len={length}')\n\n# Calculate cursor position after frame 0\ntotal_chars = sum(length for _, length in runs)\nprint(f'\\nTotal chars in frame 0: {total_chars}')\nend_row = (total_chars - 1) // width\nend_col = (total_chars - 1) % width\nprint(f'Cursor ends at: row={end_row}, col={end_col}')\n\"\n",
      "duration": 2.0
    }
  ]
}
```