fix: pair psycopg releases and serialize test setup

Co-authored-by: open-swe[bot] <open-swe@users.noreply.github.com>

libs/langgraph/Makefile

@@ -44,13 +44,26 @@ stop-services:
 	docker compose -f tests/compose-postgres.yml -f tests/compose-redis.yml down -v
 
 start-dev-server:
-	LOG_LEVEL=warning uv run langgraph dev --config tests/example_app/langgraph.json --no-browser & echo "$$!" > .devserver.pid
-	@echo "Dev server started."
+	uv sync --frozen --group test --no-dev
+	@LOG_LEVEL=warning uv run --no-sync langgraph dev --config tests/example_app/langgraph.json --no-browser --no-reload & \
+	PID=$$!; echo "$$PID" > .devserver.pid; \
+	for ATTEMPT in $$(seq 1 60); do \
+		if ! kill -0 $$PID 2>/dev/null; then break; fi; \
+		if curl --fail --silent --max-time 1 http://localhost:2024/ok >/dev/null; then \
+			echo "Dev server ready."; exit 0; \
+		fi; \
+		sleep 1; \
+	done; \
+	echo "Dev server failed to become ready." >&2; \
+	kill $$PID 2>/dev/null || true; \
+	wait $$PID 2>/dev/null || true; \
+	rm -f .devserver.pid; exit 1
 
 stop-dev-server:
 	@if [ -f .devserver.pid ]; then \
-		kill `cat .devserver.pid` && rm .devserver.pid; \
-		 echo "Dev server stopped."; \
+		kill $$(cat .devserver.pid) 2>/dev/null || true; \
+		rm -f .devserver.pid; \
+		echo "Dev server stopped."; \
 	else \
 		echo "No dev server PID file found."; \
 	fi
@@ -60,13 +73,12 @@ NO_DOCKER ?= $(sh command -v docker >/dev/null 2>&1 && echo "false" || echo "tru
 
 test:
 	if [ "$(NO_DOCKER)" = "false" ]; then \
-		make start-services &&\
-		make start-dev-server &&\
-		uv run pytest $(TEST); \
-		EXIT_CODE=$$?; \
-		make stop-services; \
-		make stop-dev-server; \
-		exit $$EXIT_CODE; \
+		trap '$(MAKE) stop-dev-server; $(MAKE) stop-services' EXIT; \
+		trap 'exit 130' INT; trap 'exit 143' TERM; \
+		$(MAKE) start-services &&\
+		$(MAKE) start-dev-server &&\
+		uv run --no-sync pytest $(TEST); \
+		exit $$?; \
 	else \
 		NO_DOCKER=true uv run pytest $(TEST) ; \
 		EXIT_CODE=$$?; \
@@ -74,13 +86,12 @@ test:
 	fi
 
 test_parallel:
-	make start-services &&\
-	make start-dev-server &&\
-	uv run pytest -n auto --dist worksteal $(TEST) -vv --lf; \
-	EXIT_CODE=$$?; \
-	make stop-services; \
-	make stop-dev-server; \
-	exit $$EXIT_CODE
+	trap '$(MAKE) stop-dev-server; $(MAKE) stop-services' EXIT; \
+	trap 'exit 130' INT; trap 'exit 143' TERM; \
+	$(MAKE) start-services &&\
+	$(MAKE) start-dev-server &&\
+	uv run --no-sync pytest -n auto --dist worksteal $(TEST) -vv --lf; \
+	exit $$?
 
 integration_tests:
 	uv run pytest integration_tests

libs/langgraph/uv.lock

@@ -1842,7 +1842,7 @@ dev = [
     { name = "langgraph-checkpoint", editable = "../checkpoint" },
     { name = "langgraph-checkpoint-postgres", editable = "../checkpoint-postgres" },
     { name = "langgraph-checkpoint-sqlite", editable = "../checkpoint-sqlite" },
-    { name = "psycopg-binary" },
+    { name = "psycopg", extras = ["binary"] },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },
@@ -1862,7 +1862,7 @@ test = [
     { name = "langgraph-checkpoint", editable = "../checkpoint" },
     { name = "langgraph-checkpoint-postgres", editable = "../checkpoint-postgres" },
     { name = "langgraph-checkpoint-sqlite", editable = "../checkpoint-sqlite" },
-    { name = "psycopg-binary" },
+    { name = "psycopg", extras = ["binary"] },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },

libs/prebuilt/pyproject.toml

@@ -46,7 +46,7 @@ test = [
     "langgraph-checkpoint-sqlite",
     "langgraph-checkpoint-postgres",
     "syrupy",
-    "psycopg-binary",
+    "psycopg[binary]",
 ]
 lint = [
     "ruff",

libs/prebuilt/uv.lock

@@ -527,7 +527,7 @@ dev = [
     { name = "langgraph-checkpoint" },
     { name = "langgraph-checkpoint-postgres" },
     { name = "langgraph-checkpoint-sqlite" },
-    { name = "psycopg-binary" },
+    { name = "psycopg", extra = ["binary"] },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },
@@ -547,7 +547,7 @@ test = [
     { name = "langgraph-checkpoint" },
     { name = "langgraph-checkpoint-postgres" },
     { name = "langgraph-checkpoint-sqlite" },
-    { name = "psycopg-binary" },
+    { name = "psycopg", extra = ["binary"] },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },
@@ -569,7 +569,7 @@ dev = [
     { name = "langgraph-checkpoint", editable = "../checkpoint" },
     { name = "langgraph-checkpoint-postgres", editable = "../checkpoint-postgres" },
     { name = "langgraph-checkpoint-sqlite", editable = "../checkpoint-sqlite" },
-    { name = "psycopg-binary" },
+    { name = "psycopg", extras = ["binary"] },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },
@@ -589,7 +589,7 @@ test = [
     { name = "langgraph-checkpoint", editable = "../checkpoint" },
     { name = "langgraph-checkpoint-postgres", editable = "../checkpoint-postgres" },
     { name = "langgraph-checkpoint-sqlite", editable = "../checkpoint-sqlite" },
-    { name = "psycopg-binary" },
+    { name = "psycopg", extras = ["binary"] },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },
@@ -821,15 +821,20 @@ wheels = [
 
 [[package]]
 name = "psycopg"
-version = "3.3.4"
+version = "3.3.6"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "typing-extensions", marker = "python_full_version < '3.13'" },
     { name = "tzdata", marker = "sys_platform == 'win32'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/db/2f/cb91e5502ec9de1de6f1b76cfbf69531932725361168bb06963620c77e2e/psycopg-3.3.4.tar.gz", hash = "sha256:e21207764952cff81b6b8bdacad9a3939f2793367fdac2987b3aac36a651b5bc", size = 165799, upload-time = "2026-05-01T23:31:55.179Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/76/26/3ea4ca5eaea1c0debcdf7ee7c1613fbe721dc27a03c461c0817ffd8a0601/psycopg-3.3.6.tar.gz", hash = "sha256:c081f2250df751a943036e42db6df4571c66cd0aabe8291a7a506512b12007d2", size = 168171, upload-time = "2026-09-18T13:22:55.152Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/5c/e0/7b3dee031daae7743609ce3c746565d4a3ed7c2c186479eb48e34e838c64/psycopg-3.3.4-py3-none-any.whl", hash = "sha256:b6bbc25ccf05c8fad3b061d9db2ef0909a555171b84b07f29458a447253d679a", size = 213001, upload-time = "2026-05-01T23:20:50.816Z" },
+    { url = "https://files.pythonhosted.org/packages/4e/de/748bd7609c71cae5d737f0ba9192f19329f70180ecda8fff3cac02c5abe3/psycopg-3.3.6-py3-none-any.whl", hash = "sha256:a1db9f7148b06a28606767efaca51fa6f9398c5c0a3810519be69d7000bdb631", size = 215490, upload-time = "2026-09-18T13:15:29.374Z" },
+]
+
+[package.optional-dependencies]
+binary = [
+    { name = "psycopg-binary", marker = "implementation_name != 'pypy'" },
 ]
 
 [[package]]