chore: langchain 1.0 compat

libs/langgraph/pyproject.toml

@@ -1,3 +1,3 @@
 [build-system]
 requires = ["hatchling"]
 build-backend = "hatchling.build"
@@ -37,6 +37,7 @@
     "jupyter",
     "pytest-xdist[psutil]",
     "pytest-repeat",
+    "langchain-core",
     "langgraph-prebuilt",
     "langgraph-checkpoint",
     "langgraph-checkpoint-sqlite",
@@ -56,6 +57,7 @@
 default-groups = ['dev']
 
 [tool.uv.sources]
+langchain-core = { git = "https://github.com/langchain-ai/langchain/", branch = "cc/1.0/standard_content_parse_tc", subdirectory = "libs/core"}
 langgraph-prebuilt = { path = "../prebuilt", editable = true }
 langgraph-checkpoint = { path = "../checkpoint", editable = true }
 langgraph-checkpoint-sqlite = { path = "../checkpoint-sqlite", editable = true }

libs/langgraph/tests/test_pregel.py

@@ -6597,7 +6597,7 @@ def test_tags_stream_mode_messages() -> None:
         )
     ) == [
         (
-            _AnyIdAIMessageChunk(content="foo"),
+            _AnyIdAIMessageChunk(content="foo", chunk_position="last"),
             {
                 "langgraph_step": 1,
                 "langgraph_node": "call_model",

libs/langgraph/tests/test_pregel_async.py

@@ -7547,7 +7547,7 @@ async def call_model(state, config):
         )
     ] == [
         (
-            _AnyIdAIMessageChunk(content="foo"),
+            _AnyIdAIMessageChunk(content="foo", chunk_position="last"),
             {
                 "langgraph_step": 1,
                 "langgraph_node": "call_model",

libs/prebuilt/pyproject.toml

@@ -28,6 +28,7 @@ dev = [
     "pytest-mock",
     "pytest-watcher",
     "mypy",
+    "langchain-core",
     "langgraph",
     "langgraph-checkpoint",
     "langgraph-checkpoint-sqlite",
@@ -39,6 +40,7 @@ dev = [
 default-groups = ['dev']
 
 [tool.uv.sources]
+langchain-core = { git = "https://github.com/langchain-ai/langchain/", branch = "cc/1.0/standard_content_parse_tc", subdirectory = "libs/core"}
 langgraph = { path = "../langgraph", editable = true }
 langgraph-checkpoint = { path = "../checkpoint", editable = true }
 langgraph-checkpoint-sqlite = { path = "../checkpoint-sqlite", editable = true }