diag: validate router output before MoE

single_shot_inference.py

@@ -380,6 +380,9 @@ def forward_attention(x_normed, w, li, cfg, rope_cos, rope_sin,
 # =====================================================================
 def moe_forward(x, li, moe_runner, se_runner, router, token_id):
     topk_w, topk_ids = router(x, token_ids=token_id)
+    # Diag: validate router output before MoE
+    if topk_ids.max().item() >= 384 or topk_ids.min().item() < 0:
+        print(f"  L{li} BAD topk_ids: min={topk_ids.min().item()} max={topk_ids.max().item()}", flush=True)
     routed_out = moe_runner.run(x, topk_w, topk_ids)
     shared_out = se_runner.run(x)
     return routed_out + shared_out