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{"type":"item.completed","item":{"id":"item_2","type":"agent_message","text":"```python\nimport numpy as np\nslots=[486,487,488,489,491,492]+list(range(496,510))\nw3=load(\"L3.W\");b3=load(\"L3.b\");w4=load(\"L4.W\")\nfor s in slots:\n    w3[:,s]=0\n    w4[s,:486]=0\n\ndef distribute(slot,color,center):\n    r,c=divmod(center,9)\n    pts=[center]+[rr*9+cc for rr,cc in\n        ((r-1,c),(r+1,c),(r,c-1),(r,c+1))\n        if 0<=rr<9 and 0<=cc<9]\n    for v in pts:w4[slot,(2 if color==0 else 3)*81+v]-=1\n\n# Edge chains are especially important: two distant liberties there can\n# otherwise look like a capture and provoke a repeating throw-in.\nn=0\nfor r,c in ((0,2),(0,6),(2,0),(6,0),(2,8),(6,8),(8,2),(8,6)):\n    dr,dc=(0,1) if r in (0,8) else (1,0)\n    center=r*9+c\n    ends=[(r-dr)*9+c-dc,(r+dr)*9+c+dc]\n    for color,start in ((0,2),(1,4)):\n        s=slots[n];n+=1;b3[s]=-2\n        for v in [center]+ends:w3[color*81+v,s]+=1\n        for v in ends:\n            vr,vc=divmod(v,9)\n            cls=1-((vr+vc)%2)\n            w3[(start+cls)*81+v,s]-=1\n        distribute(s,color,center)\n\n# Preserve the exact central cross certificates.\nfor liberties in ((30,50),(32,48)):\n    for color in (0,1):\n        s=slots[n];n+=1;b3[s]=-4\n        for v in (40,31,39,41,49):w3[color*81+v,s]+=1\n        for v in liberties:\n            w3[v,s]-=1;w3[81+v,s]-=1\n        distribute(s,color,40)\n\nsave(\"L3.W\",w3);save(\"L3.b\",b3);save(\"L4.W\",w4)\nprint(\"Replaced interior spare certificates with exact edge-chain safety tests.\")\n```\n"}}
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