From 1027c213f90cac474446996e4af3d92d047ba096 Mon Sep 17 00:00:00 2001
From: Gyeongjae Choi <gyeongjae@cloudflare.com>
Date: Wed, 30 Sep 2026 11:49:48 +0900
Subject: [PATCH] fix(runtime-sdk): fix top-level entropy calls in fastapi >=
 0.142.0

---
 .../src/_workers_sdk_entropy_import_context.py           | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/packages/runtime-sdk/src/_workers_sdk_entropy_import_context.py b/packages/runtime-sdk/src/_workers_sdk_entropy_import_context.py
index 8b87d750..353e2d48 100644
--- a/packages/runtime-sdk/src/_workers_sdk_entropy_import_context.py
+++ b/packages/runtime-sdk/src/_workers_sdk_entropy_import_context.py
@@ -229,6 +229,15 @@ def opentelemetry_baggage_context(module):
         yield
 
 
+@register_exec_patch("fastapi.telemetry")
+@contextmanager
+def fastapi_telemetry_context(module):
+    # fastapi 0.142.0 added opentelemetry support
+    # which creates a UUID-backed key.
+    with allow_bad_entropy_calls_for_version("fastapi", 1, (0, 142, 0)):
+        yield
+
+
 @register_exec_patch("litestar.openapi.controller")
 @register_exec_patch("litestar.constants")
 @contextmanager