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{"type":"item.completed","item":{"id":"item_1","type":"agent_message","text":"```python\nimport json,shutil\nshutil.copyfile(\"/work/design.py\",\"/work/design_v19.py\")\ns=open(\"/work/design.py\").read()\nneedle='# Further layers broadcast safety across fully connected segments.\\nfor k,color,danger in [(2,1,4),(3,1,3)]:\\n    for j,seg in enumerate(segments):'\nreplacement=r'''\n# Stagger the later block certificates. Together the three enemy\n# stages cover all 64 possible 2x2 blocks, preserving board symmetries.\ndef blocks_with_orbits(orbits):\n    out=[]\n    for r in range(8):\n        for c in range(8):\n            key=tuple(sorted([abs(2*r-7),abs(2*c-7)]))\n            if key in orbits:\n                out.append([(r+dr)*9+c+dc for dr in [0,1] for dc in [0,1]])\n    return out\nthird=blocks_with_orbits({(1,3),(5,7),(1,1),(5,5)})\nfourth=blocks_with_orbits({(1,5),(1,7),(3,5)})\nassert len(third)==len(fourth)==24\nassert len({tuple(x) for x in segments+third+fourth})==64\n\n# Further layers broadcast safety across fully connected blocks.\nfor k,color,danger in [(2,1,4),(3,1,3)]:\n    active_segments=third if k==2 else fourth\n    for j,seg in enumerate(active_segments):'''\nassert needle in s\ns=s.replace(needle,replacement)\ns=s.replace('for jj,other in enumerate(segments):','for jj,other in enumerate(third):')\nopen(\"/work/design.py\",\"w\").write(s)\noverrides=json.load(open(\"/work/params_v9.json\"))\nexec(s)\nprint(\"Staggered safety certificates cover every 2x2 block.\")\n```\n"}}
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