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{"type":"item.completed","item":{"id":"item_0","type":"error","message":"Code Mode is unavailable because code-mode host is disabled. Code mode will fail closed; enable `features.code_mode_host` and install `codex-code-mode-host`."}}
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{"type":"item.completed","item":{"id":"item_1","type":"agent_message","text":"```python\nimport numpy as np\nfrom scipy.linalg import svdvals\nfrom threadpoolctl import threadpool_limits\n\nnp.set_printoptions(precision=4, suppress=True)\nwith threadpool_limits(limits=4):\n    print(\"WEIGHTS\")\n    for name in sorted(W):\n        a = W[name]\n        print(name, a.shape, \"mean\", float(a.mean()), \"std\", float(a.std()),\n              \"norm\", float(np.linalg.norm(a)), \"min/max\", float(a.min()), float(a.max()))\n    print(\"\\nHEAD SPECTRA: QK = Q.T @ K / 8; OV = O @ V\")\n    for l in range(4):\n        for j in range(6):\n            s = slice(64*j, 64*(j+1))\n            q, k, v, o = (W[f\"W_q.{l}\"][s], W[f\"W_k.{l}\"][s],\n                           W[f\"W_v.{l}\"][s], W[f\"W_o.{l}\"][:,s])\n            a, b = q.T @ k / 8, o @ v\n            sa, sb = svdvals(a), svdvals(b)\n            print(f\"L{l}H{j}\",\n                  \"Q/K/V/O norms\", np.round([np.linalg.norm(z) for z in (q,k,v,o)], 3),\n                  \"QK top\", np.round(sa[:8], 3),\n                  \"QK stable rank\", round(float((sa@sa)/(sa[0]**2)), 2),\n                  \"QK symmetric fraction\", round(float(np.linalg.norm(a+a.T)/(2*np.linalg.norm(a))), 3),\n                  \"OV top\", np.round(sb[:6], 3),\n                  \"OV trace/nuclear\", round(float(np.trace(b)/sb.sum()), 3))\n```\n"}}
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