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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_v10.py\")\ns=open(\"/work/design_v9.py\").read()\na=s.index('    # Local liberty pressure')\nb=s.index('# Fourth layer',a)\ns=s[:a]+r'''\n    # Long-range safety messages travel only through proven same-colour\n    # bridges: a stone and ALL its neighbours must have that colour.\n    # Every Manhattan-distance-two endpoint is then connected to it.\n    ring2=points(p,DI+JU)\n    for color,ach,ch in [(0,2,4),(1,4,5)]:\n        dest=unit(ch,p)\n        B[2][dest]=-len(adj[p])-1\n        add(2,dest,unit(color,p),1)\n        for q in adj[p]:\n            add(2,dest,unit(color,q),1)\n        for q in ring2:\n            add(2,dest,unit(color,q),1/16)\n            add(2,dest,unit(ach,q),-1/16)\n\n''' + s[b:]\na=s.index('# Fourth layer')\nb=s.index('# Sixth layer',a)\ns=s[:a]+r'''\n# Fourth layer: ordinary propagation plus certified dense bridges.\nfor p in range(81):\n    for ch in (0,1):\n        carry(3,ch,p)\n    for color,dch,tch in [(0,2,4),(1,3,5)]:\n        dest=unit(dch,p)\n        add(3,dest,unit(dch,p),1)\n        add(3,dest,unit(tch,p),-4096)\n        for q in adj[p]:\n            add(3,dest,unit(color,q),-1)\n            add(3,dest,unit(dch,q),1)\n            add(3,dest,unit(tch,q),-4096)\n        dest=unit(tch,p)\n        B[3][dest]=-len(adj[p])-1\n        add(3,dest,unit(color,p),1)\n        for q in adj[p]:\n            add(3,dest,unit(color,q),1)\n        for q in points(p,DI+JU):\n            add(3,dest,unit(color,q),1/16)\n            add(3,dest,unit(dch,q),-1/16)\n            add(3,dest,unit(tch,q),1/16)\n\n# Fifth layer completes long-range propagation and prepares action features.\nfor p in range(81):\n    for ch in (0,1):\n        carry(4,ch,p)\n    for color,dch,tch in [(0,2,4),(1,3,5)]:\n        dest=unit(dch,p)\n        add(4,dest,unit(dch,p),1)\n        add(4,dest,unit(tch,p),-4096)\n        for q in adj[p]:\n            add(4,dest,unit(color,q),-1)\n            add(4,dest,unit(dch,q),1)\n            add(4,dest,unit(tch,q),-4096)\n\n    # Proactive pressure on enemy stones with few local liberties.\n    dest=unit(4,p)\n    B[4][dest]=-len(adj[p])\n    add(4,dest,unit(1,p),3)\n    for q in adj[p]:\n        add(4,dest,unit(0,q),1)\n        add(4,dest,unit(1,q),0.5)\n\n    dest=unit(5,p)\n    B[4][dest]=1\n    for q in adj[p]:\n        add(4,dest,unit(0,q),-1)\n        add(4,dest,unit(2,q),1)\n        add(4,dest,unit(4,q),-4096)\n\n''' + s[b:]\ns=s.replace('    add(5,dest,unit(4,p),1)',\n'''    for q in adj[p]:\n        add(5,dest,unit(4,q),P[\"weak_enemy\"])''')\nopen(\"/work/design.py\",\"w\").write(s)\noverrides=json.load(open(\"/work/params_v9.json\"))\nexec(s)\nprint(\"Added certified two-step safety propagation through dense strings.\")\n```\n"}}
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