diff --git a/.github/workflows/pypi-publish.yml b/.github/workflows/pypi-publish.yml
new file mode 100644
index 0000000..76cad04
--- /dev/null
+++ b/.github/workflows/pypi-publish.yml
@@ -0,0 +1,24 @@
+name: Python package
+on:
+  push:
+    tags:
+      - "v*.*.*"
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v3
+        name: Ensure Python Runtime
+        with:
+          python-version: '3.x'
+          architecture: 'x64'
+      - name: Ensure PDM & twine
+        run: |
+          python3 -m pip install pdm twine
+      - name: Build Package
+        run: |
+          pdm build
+      - name: Publish to PyPI
+        run: |
+          twine upload dist/* --non-interactive -u __token__ -p ${{ secrets.PYPI_TOKEN }}
\ No newline at end of file
diff --git a/creart/creator.py b/creart/creator.py
index 7b972c2..05b5011 100644
--- a/creart/creator.py
+++ b/creart/creator.py
@@ -7,26 +7,45 @@
 
 @dataclass
 class CreateTargetInfo:
+    """Information of create target."""
+
     module: str
+    """dotted name of target's module"""
+
     identify: str
+    """target's qualified name"""
 
     # info for cli
     humanized_name: str | None = None
+    """humanized name"""
+
     description: str | None = None
+    """description of target"""
+
     author: list[str] | None = None
+    """list of authors"""
+
 
 
 T = TypeVar("T")
 
 
 class AbstractCreator(metaclass=ABCMeta):
+    """factory of `targets` class attributes
+
+    add `entry points` in your distribution to support auto discovery.
+    """
+
     targets: ClassVar[tuple[CreateTargetInfo, ...]]
+    """Supported targets' creation info, as a tuple."""
 
     @staticmethod
     def available() -> bool:
+        """This function will be called to determine whether the targets could be created."""
         return True
 
     @staticmethod
     @abstractmethod
     def create(create_type: type[T]) -> T:
+        """Actual creation implementation."""
         ...
diff --git a/creart/py.typed b/creart/py.typed
new file mode 100644
index 0000000..e69de29