Create app.py

app.py

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+import gradio as gr, numpy as np, wfgy_sdk as w
+from wfgy_sdk.evaluator import compare_logits
+
+def run(prompt):
+    logits = np.random.randn(32000)            # demo: fake logits
+    G = np.random.randn(256); G /= np.linalg.norm(G)
+    I = G + np.random.normal(scale=0.05, size=256)
+    out = w.get_engine().run(input_vec=I, ground_vec=G, logits=logits)
+    m = compare_logits(logits, out)
+    return f"variance ↓ {(1-m['std_ratio'])*100:.0f}%   |   KL {m['kl_divergence']:.2f}"
+
+demo = gr.Interface(
+    fn=run,
+    inputs=gr.Textbox(label="Prompt"),
+    outputs=gr.Textbox(label="WFGY stats"),
+    title="WFGY Quick Tester",
+    description="Type anything, see variance & KL instantly."
+)
+demo.launch()