{
  "analysis": "Row 1 has mostly 4-5 small changes per frame at specific columns. These are scattered, so each needs cursor positioning. Let me calculate the actual cost more precisely and understand the pattern of larger-change frames.",
  "plan": "Calculate the exact cost for a more targeted strategy: position cursor and write only changed characters, without worrying about runs.",
  "commands": [
    {
      "keystrokes": "python3 -c \"\nimport struct\n\nwith open('/app/frames.tza', 'rb') as f:\n    f.read(4)\n    w, h = struct.unpack('<HH', f.read(4))\n    n_frames, max_bytes = struct.unpack('<II', f.read(8))\n    frames = [f.read(w*h) for _ in range(n_frames)]\n\ndef pos_bytes(r, c):\n    # ESC[r;cH = 3 + len(str(r)) + 1 + len(str(c))\n    return 3 + len(str(r)) + 1 + len(str(c))\n\n# Calculate cost: position + write for each changed cell\ntotal_cost = 0\n\n# Frame 0: write non-space cells\nfor r in range(h):\n    for c in range(w):\n        if frames[0][r*w+c] != 32:\n            total_cost += pos_bytes(r+1, c+1) + 1\ntotal_cost += 1  # delimiter\nprint(f'Frame 0 cost: {total_cost}')\n\n# Subsequent frames\nfor i in range(1, n_frames):\n    frame_cost = 0\n    for r in range(h):\n        for c in range(w):\n            if frames[i-1][r*w+c] != frames[i][r*w+c]:\n                frame_cost += pos_bytes(r+1, c+1) + 1\n    total_cost += frame_cost + 1\n\nprint(f'Total cost: {total_cost}')\nprint(f'Budget: {max_bytes}')\nprint(f'Over/under: {total_cost - max_bytes}')\n\"\n",
      "duration": 3.0
    }
  ]
}