diff --git a/scripts/diagnostics/android-quiet-turn-render-budget.py b/scripts/diagnostics/android-quiet-turn-render-budget.py
new file mode 100644
index 0000000000..802874ced0
--- /dev/null
+++ b/scripts/diagnostics/android-quiet-turn-render-budget.py
@@ -0,0 +1,53 @@
+"""Failing rendering probe for https://github.com/getpaseo/paseo/issues/4634.
+
+Prepare the packaged Android app through agent-device: foreground a conversation
+with a quiet running turn, close the sidebar, and leave the device untouched.
+Run this probe, then repeat on an idle conversation while that turn continues.
+
+The default 10 FPS ceiling tests the report's expectation of few redraws. It is
+an investigation hypothesis, not an agreed product performance budget. Status
+rings and tool-label shimmer also animate; a failure does not identify which
+animation draws, prove whole-conversation repainting, or measure device heating.
+This device-dependent probe is deliberately outside the regular test suite.
+"""
+
+import argparse
+import json
+import re
+import subprocess
+import time
+
+
+def main():
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--package", default="sh.paseo")
+    parser.add_argument("--seconds", type=float, default=10)
+    parser.add_argument("--max-fps", type=float, default=10)
+    args = parser.parse_args()
+    if args.seconds <= 0 or args.max_fps < 0:
+        parser.error("seconds must be positive and max-fps must be nonnegative")
+
+    command = ["adb", "shell", "dumpsys", "gfxinfo", args.package]
+    subprocess.run(command + ["reset"], check=True, capture_output=True, text=True)
+    started = time.monotonic()
+    time.sleep(args.seconds)
+    output = subprocess.check_output(command, text=True)
+    elapsed = time.monotonic() - started
+    counts = re.findall(r"^Total frames rendered:\s+(\d+)", output, re.MULTILINE)
+    if not counts:
+        raise RuntimeError("No frame counter found; verify the app is running")
+    frames = int(counts[0])
+    fps = frames / elapsed
+    print(
+        json.dumps({"frames": frames, "seconds": elapsed, "fps": fps,
+                    "maximumFps": args.max_fps}),
+        flush=True,
+    )
+    assert fps <= args.max_fps, (
+        f"Quiet-turn redraw hypothesis failed: {fps:.1f} FPS exceeds "
+        f"{args.max_fps:.1f} FPS. This establishes frame frequency, not cause."
+    )
+
+
+if __name__ == "__main__":
+    main()