min deps ci and pydantic version fix

.github/workflows/_test.yml

@@ -58,3 +58,13 @@ jobs:
           # grep will exit non-zero if the target message isn't found,
           # and `set -e` above will cause the step to fail.
           echo "$STATUS" | grep 'nothing to commit, working tree clean'
+
+      - name: Install min version of deps
+        shell: bash
+        working-directory: ${{ inputs.working-directory }}
+        run: uv sync --no-default-groups --resolution lowest-direct --no-sources --force-reinstall
+
+      - name: Run tests with min version of deps
+        shell: bash
+        working-directory: ${{ inputs.working-directory }}
+        run: make test

.github/workflows/_test_langgraph.yml

@@ -53,3 +53,13 @@ jobs:
           # grep will exit non-zero if the target message isn't found,
           # and `set -e` above will cause the step to fail.
           echo "$STATUS" | grep 'nothing to commit, working tree clean'
+
+      - name: Install min version of deps
+        shell: bash
+        working-directory: ${{ inputs.working-directory }}
+        run: uv sync --no-default-groups --resolution lowest-direct --no-sources --force-reinstall
+
+      - name: Run tests with min version of deps
+        shell: bash
+        working-directory: ${{ inputs.working-directory }}
+        run: make test

libs/langgraph/pyproject.toml

@@ -17,7 +17,8 @@ dependencies = [
     "langgraph-sdk>=0.1.42,<0.2.0",
     "langgraph-prebuilt>=0.5.0,<0.6.0",
     "xxhash>=3.5.0",
-    "pydantic>=2.7.4",
+    "pydantic>=2.7.4; python_version < '3.13'",
+    "pydantic>=2.0.0; python_version >= '3.13'",
 ]
 
 [project.urls]