From ca7042dec279d57139c17cc602e1fb674e4f469c Mon Sep 17 00:00:00 2001
From: john lee <64lamei@gmail.com>
Date: Thu, 21 May 2026 16:42:26 +0800
Subject: [PATCH] chore(windows): add PYTHONIOENCODING and PYTHONUTF8 to
 backend Makefile targets (#3069)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

langgraph-api emits → and ⚠️ characters in version-check log lines.
On Windows with cp1252 as the default stream encoding, each such line
throws a UnicodeEncodeError inside the logging handler, littering
startup output with tracebacks (though the server still boots).

#1550 already fixed this for scripts/check.py via stream.reconfigure().
Apply the same treatment to the backend Makefile dev/gateway/test
targets by setting PYTHONIOENCODING=utf-8 and PYTHONUTF8=1 before each
uv run invocation. Both variables are no-ops on Linux/macOS where UTF-8
is already the default.

Closes #2337

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 backend/Makefile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/backend/Makefile b/backend/Makefile
index 81a055684..a1206547b 100644
--- a/backend/Makefile
+++ b/backend/Makefile
@@ -2,13 +2,13 @@ install:
 	uv sync
 
 dev:
-	PYTHONPATH=. uv run uvicorn app.gateway.app:app --host 0.0.0.0 --port 8001 --reload
+	PYTHONPATH=. PYTHONIOENCODING=utf-8 PYTHONUTF8=1 uv run uvicorn app.gateway.app:app --host 0.0.0.0 --port 8001 --reload
 
 gateway:
-	PYTHONPATH=. uv run uvicorn app.gateway.app:app --host 0.0.0.0 --port 8001
+	PYTHONPATH=. PYTHONIOENCODING=utf-8 PYTHONUTF8=1 uv run uvicorn app.gateway.app:app --host 0.0.0.0 --port 8001
 
 test:
-	PYTHONPATH=. uv run pytest tests/ -v
+	PYTHONPATH=. PYTHONIOENCODING=utf-8 PYTHONUTF8=1 uv run pytest tests/ -v
 
 lint:
 	uvx ruff check .