{
  "analysis": "Still at 267K bytes. Let me calculate the actual minimum cost needed and see what strategy could work. The budget is 69K for 1200 frames = 57.5 bytes/frame.",
  "plan": "Calculate the theoretical minimum cost and figure out what encoding strategy could achieve it.",
  "commands": [
    {
      "keystrokes": "python3 << 'EOF'\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\n# Calculate minimum possible cost\n# Frame 0: 901 non-space chars\n# Each char needs at least 1 byte + positioning\n# Best case: all in runs, minimal positioning\nframe0_non_space = sum(1 for b in frames[0] if b != 32)\nprint(f'Frame 0: {frame0_non_space} non-space chars')\nprint(f'  Minimum cost (just chars): {frame0_non_space} bytes')\nprint(f'  With delimiters: {frame0_non_space + 1} bytes')\n\n# Subsequent frames\ntotal_changes = 0\nfor i in range(1, n_frames):\n    changes = sum(1 for j in range(w*h) if frames[i-1][j] != frames[i][j])\n    total_changes += changes\n\nprint(f'\\nTotal changes in frames 1+: {total_changes}')\nprint(f'  Minimum cost (just chars + delimiters): {total_changes + n_frames - 1} bytes')\n\nprint(f'\\nAbsolute minimum: {frame0_non_space + 1 + total_changes + n_frames - 1} bytes')\nprint(f'Budget: {max_bytes} bytes')\nprint(f'Overhead available: {max_bytes - (frame0_non_space + 1 + total_changes + n_frames - 1)} bytes for positioning')\nprint(f'  Per change: {(max_bytes - (frame0_non_space + 1 + total_changes + n_frames - 1)) / total_changes:.2f} bytes')\nEOF\n",
      "duration": 3.0
    }
  ]
}