Bisect switch

app.py

@@ -27,6 +27,10 @@ from pathlib import Path
 APP_DIR = Path(__file__).parent.resolve()
 sys.path.insert(0, str(APP_DIR))
 
+if os.environ.get("BISECT") == "minimal":  # diagnostics: bare spaces+torch+gradio
+    exec(open(APP_DIR / "probe_app.py").read())
+    raise SystemExit(0)
+
 os.environ.setdefault("TORCH_CUDA_ARCH_LIST", "12.0")
 os.environ.setdefault("MAX_JOBS", str(min(32, (os.cpu_count() or 8))))
 os.environ.setdefault("WANDB_MODE", "disabled")

probe_app.py

@@ -0,0 +1,20 @@
+"""Minimal ZeroGPU probe (diagnostics only)."""
+import os
+import spaces
+import torch
+import gradio as gr
+
+_t = torch.zeros(4).to("cuda")
+
+
+@spaces.GPU(duration=20)
+def gpu_probe() -> str:
+    """Report the GPU visible to the ZeroGPU worker."""
+    return f"{torch.cuda.get_device_name()} | {_t.device} | torch {torch.__version__}"
+
+
+with gr.Blocks() as demo:
+    b = gr.Button("probe")
+    o = gr.Textbox()
+    b.click(gpu_probe, outputs=o, api_name="gpu_probe")
+demo.launch()