chore(anthropic): add version (#35293)

Author: ccurme

.github/workflows/check_core_versions.yml

@@ -9,6 +9,8 @@ on:
     paths:
       - "libs/core/pyproject.toml"
       - "libs/core/langchain_core/version.py"
+      - "libs/partners/anthropic/pyproject.toml"
+      - "libs/partners/anthropic/langchain_anthropic/_version.py"
 
 permissions:
   contents: read
@@ -49,3 +51,17 @@ jobs:
           else
             echo "Langchain v1 versions match: $LANGCHAIN_PYPROJECT_VERSION"
           fi
+
+          # Check langchain-anthropic versions
+          ANTHROPIC_PYPROJECT_VERSION=$(grep -Po '(?<=^version = ")[^"]*' libs/partners/anthropic/pyproject.toml)
+          ANTHROPIC_VERSION_PY_VERSION=$(grep -Po '(?<=^__version__ = ")[^"]*' libs/partners/anthropic/langchain_anthropic/_version.py)
+
+          # Compare langchain-anthropic versions
+          if [ "$ANTHROPIC_PYPROJECT_VERSION" != "$ANTHROPIC_VERSION_PY_VERSION" ]; then
+            echo "langchain-anthropic versions in pyproject.toml and _version.py do not match!"
+            echo "pyproject.toml version: $ANTHROPIC_PYPROJECT_VERSION"
+            echo "_version.py version: $ANTHROPIC_VERSION_PY_VERSION"
+            exit 1
+          else
+            echo "Langchain-anthropic versions match: $ANTHROPIC_PYPROJECT_VERSION"
+          fi

libs/partners/anthropic/Makefile

@@ -51,13 +51,17 @@ format format_diff:
 check_imports: $(shell find langchain_anthropic -name '*.py')
 	uv run --all-groups python ./scripts/check_imports.py $^
 
+check_version:
+	uv run python ./scripts/check_version.py
+
 ######################
 # HELP
 ######################
 
 help:
 	@echo '----'
-	@echo 'check_imports				- check imports'
+	@echo 'check_imports                - check imports'
+	@echo 'check_version                - validate version consistency'
 	@echo 'format                       - run code formatters'
 	@echo 'lint                         - run linters'
 	@echo 'type                         - run type checking'

libs/partners/anthropic/langchain_anthropic/__init__.py

@@ -1,5 +1,6 @@
 """Claude (Anthropic) partner package for LangChain."""
 
+from langchain_anthropic._version import __version__
 from langchain_anthropic.chat_models import (
     ChatAnthropic,
     convert_to_anthropic_tool,
@@ -9,5 +10,6 @@
 __all__ = [
     "AnthropicLLM",
     "ChatAnthropic",
+    "__version__",
     "convert_to_anthropic_tool",
 ]

libs/partners/anthropic/langchain_anthropic/_version.py

@@ -0,0 +1,3 @@
+"""Version information for langchain-anthropic."""
+
+__version__ = "1.3.3"

libs/partners/anthropic/scripts/check_version.py

@@ -0,0 +1,65 @@
+"""Check version consistency between `pyproject.toml` and `_version.py`.
+
+This script validates that the version defined in pyproject.toml matches the
+`__version__` variable in `langchain_anthropic/_version.py`. Intended for use as a
+pre-commit hook to prevent version mismatches.
+"""
+
+import re
+import sys
+from pathlib import Path
+
+
+def get_pyproject_version(pyproject_path: Path) -> str | None:
+    """Extract version from `pyproject.toml`."""
+    content = pyproject_path.read_text(encoding="utf-8")
+    match = re.search(r'^version\s*=\s*"([^"]+)"', content, re.MULTILINE)
+    return match.group(1) if match else None
+
+
+def get_version_py_version(version_path: Path) -> str | None:
+    """Extract `__version__` from `_version.py`."""
+    content = version_path.read_text(encoding="utf-8")
+    match = re.search(r'^__version__\s*=\s*"([^"]+)"', content, re.MULTILINE)
+    return match.group(1) if match else None
+
+
+def main() -> int:
+    """Validate version consistency."""
+    script_dir = Path(__file__).parent
+    package_dir = script_dir.parent
+
+    pyproject_path = package_dir / "pyproject.toml"
+    version_path = package_dir / "langchain_anthropic" / "_version.py"
+
+    if not pyproject_path.exists():
+        print(f"Error: {pyproject_path} not found")  # noqa: T201
+        return 1
+
+    if not version_path.exists():
+        print(f"Error: {version_path} not found")  # noqa: T201
+        return 1
+
+    pyproject_version = get_pyproject_version(pyproject_path)
+    version_py_version = get_version_py_version(version_path)
+
+    if pyproject_version is None:
+        print("Error: Could not find version in pyproject.toml")  # noqa: T201
+        return 1
+
+    if version_py_version is None:
+        print("Error: Could not find __version__ in langchain_anthropic/_version.py")  # noqa: T201
+        return 1
+
+    if pyproject_version != version_py_version:
+        print("Error: Version mismatch detected!")  # noqa: T201
+        print(f"  pyproject.toml: {pyproject_version}")  # noqa: T201
+        print(f"  langchain_anthropic/_version.py: {version_py_version}")  # noqa: T201
+        return 1
+
+    print(f"Version check passed: {pyproject_version}")  # noqa: T201
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())

libs/partners/anthropic/tests/unit_tests/test_imports.py

@@ -1,6 +1,7 @@
 from langchain_anthropic import __all__
 
 EXPECTED_ALL = [
+    "__version__",
     "ChatAnthropic",
     "convert_to_anthropic_tool",
     "AnthropicLLM",