From 96248f940c1a69a878dc0bbdeb06ba12ae832e47 Mon Sep 17 00:00:00 2001
From: TheJulianJES <TheJulianJES@users.noreply.github.com>
Date: Fri, 27 Feb 2026 08:52:37 +0100
Subject: [PATCH] Disable device availability checker during diagnostics
 regeneration

---
 tools/regenerate_diagnostics.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/regenerate_diagnostics.py b/tools/regenerate_diagnostics.py
index cc49816ea..413aae4bc 100644
--- a/tools/regenerate_diagnostics.py
+++ b/tools/regenerate_diagnostics.py
@@ -38,6 +38,12 @@ async def main(files: list[str] | None = None) -> None:
         paths = [pathlib.Path(f) for f in files]
 
     async with create_zha_gateway() as zha_gateway:
+        # Regeneration should be deterministic: disable background tasks that can
+        # asynchronously mutate device availability while fixtures are being written.
+        zha_gateway.global_updater.stop()
+        zha_gateway._device_availability_checker.stop()  # noqa: SLF001
+        zha_gateway.config.allow_polling = False
+
         for device_json in paths:
             _LOGGER.info("Migrating %s", device_json)
             zigpy_device = await zigpy_device_from_json(