diff --git a/nb_autodoc/__main__.py b/nb_autodoc/__main__.py
index ad678b3..d1e32e6 100644
--- a/nb_autodoc/__main__.py
+++ b/nb_autodoc/__main__.py
@@ -1,22 +1,50 @@
 from typing import Tuple
+from typing_extensions import Literal
 
 import click
 
+from nb_autodoc.builders.markdown import MarkdownBuilder
+from nb_autodoc.config import Config
 from nb_autodoc.log import logger
+from nb_autodoc.manager import ModuleManager
 
 logger.setLevel("INFO")
 
 
 @click.command()
-@click.argument("modules", nargs=-1, required=True)
+@click.argument("module", required=True)
 @click.option(
     "-o",
     "--output-dir",
     default="build",
     type=click.Path(exists=False, file_okay=False, writable=True, executable=True),
+    show_default=True,
 )
-def main(modules: Tuple[str, ...], output_dir: str) -> None:
-    print(modules)
+@click.option("-s", "--skip", multiple=True, help="skip import modules")
+@click.option("-u", "--undoc", multiple=True, help="undocument modules")
+@click.option(
+    "--markdown-linkmode",
+    default="heading_id",
+    type=click.Choice(["heading_id", "vuepress"]),
+    show_default=True,
+)
+def main(
+    module: str,
+    output_dir: str,
+    skip: Tuple[str, ...],
+    undoc: Tuple[str, ...],
+    markdown_linkmode: Literal["heading_id", "vuepress"],
+) -> None:
+    manager = ModuleManager(
+        module,
+        config=Config(
+            output_dir=output_dir,
+            skip_import_modules=set(skip),
+            exclude_documentation_modules=set(undoc),
+        ),
+    )
+    builder = MarkdownBuilder(manager, link_mode=markdown_linkmode)
+    builder.write()
 
 
 if __name__ == "__main__":
diff --git a/nb_autodoc/config.py b/nb_autodoc/config.py
index 8f71e3d..9b1517c 100644
--- a/nb_autodoc/config.py
+++ b/nb_autodoc/config.py
@@ -26,8 +26,11 @@ class Config(TypedDict, total=False):
 
     Carefully add this option on a dependent module because we want to
     analyze python object relationship.
-
     Support `fnmatch` pattern, such as '*', '?', etc.
+
+    Default: `frozenset()`
+
+    CLI Flags: `-s`, `--skip`
     """
 
     ### Builder Config ###
@@ -46,10 +49,19 @@ class Config(TypedDict, total=False):
     """Exclude documentation modules.
 
     Support `fnmatch` pattern, such as '*', '?', etc.
+
+    Default: `frozenset()`
+
+    CLI Flags: `-u`, `--undoc`
     """
 
     output_dir: str
-    """Documentation output directory. Default to 'build'."""
+    """Documentation output directory.
+
+    Default: `'build'`.
+
+    CLI Flags: `-o`, `--output-dir`
+    """
 
     write_encoding: str
     """File encoding to write. Default to 'utf-8'."""