diff --git a/docforge/__init__.py b/docforge/__init__.py
index fcd0c8b..c99bf33 100644
--- a/docforge/__init__.py
+++ b/docforge/__init__.py
@@ -1,9 +1,54 @@
 """
-doc-forge — renderer-agnostic Python documentation compiler.
+# doc-forge
 
-At this stage, doc-forge publicly exposes only the Introspection Layer.
-All the rendering, exporting, and serving APIs are intentionally private
-until their contracts are finalized.
+`doc-forge` is a renderer-agnostic Python documentation compiler designed for
+speed, flexibility, and beautiful output. It decouples the introspection of
+your code from the rendering process, allowing you to generate documentation
+for various platforms (starting with MkDocs) from a single internal model.
+
+## Installation
+
+Install using `pip` with the optional `mkdocs` dependencies for a complete setup:
+
+```bash
+pip install doc-forge
+```
+
+## Quick Start
+
+1.  **Generate Markdown Sources**:
+    Introspect your package and create ready-to-use Markdown files:
+    ```bash
+    doc-forge generate --module my_package --docs-dir docs
+    ```
+
+2.  **Define Navigation**:
+    Create a `docforge.nav.yml` to organize your documentation:
+    ```yaml
+    home: my_package/index.md
+    groups:
+      Core API:
+        - my_package/core/*.md
+      Utilities:
+        - my_package/utils.md
+    ```
+
+3.  **Generate MkDocs Configuration**:
+    ```bash
+    doc-forge mkdocs --site-name "My Awesome Docs"
+    ```
+
+4.  **Preview**:
+    ```bash
+    doc-forge serve
+    ```
+
+## Project Structure
+
+- `docforge.loader`: Introspects source code using static analysis (`griffe`).
+- `docforge.model`: The internal representation of your project, modules, and objects.
+- `docforge.renderers`: Converters that turn the model into physical files.
+- `docforge.nav`: Managers for logical-to-physical path mapping and navigation.
 """
 
 from .loader import GriffeLoader, discover_module_paths
diff --git a/docforge/cli/__init__.py b/docforge/cli/__init__.py
index aef0a0c..7ced811 100644
--- a/docforge/cli/__init__.py
+++ b/docforge/cli/__init__.py
@@ -1,3 +1,18 @@
+"""
+# CLI Layer
+
+The `docforge.cli` package provides the command-line interface for interacting
+with doc-forge.
+
+## Available Commands
+
+- **tree**: Visualize the introspected project structure.
+- **generate**: Create Markdown source files from Python code.
+- **mkdocs**: Generate the primary `mkdocs.yml` configuration.
+- **build**: Build the final documentation site.
+- **serve**: Launch a local development server with live-reloading.
+"""
+
 from .main import main
 
 __all__ = [
diff --git a/docforge/cli/main.py b/docforge/cli/main.py
index d72363d..b20b6c6 100644
--- a/docforge/cli/main.py
+++ b/docforge/cli/main.py
@@ -1,3 +1,8 @@
+"""
+Main entry point for the doc-forge CLI. This module defines the core command
+group and the 'tree', 'generate', 'build', and 'serve' commands.
+"""
+
 from pathlib import Path
 from typing import Sequence, Optional
 
@@ -10,7 +15,10 @@ from docforge.cli.mkdocs import mkdocs_cmd
 
 @click.group()
 def cli() -> None:
-    """doc-forge command-line interface."""
+    """
+    doc-forge CLI: A tool for introspecting Python projects and generating
+    documentation.
+    """
     pass
 
 
@@ -35,7 +43,13 @@ def tree(
     modules: Sequence[str],
     project_name: Optional[str],
 ) -> None:
-    """Show introspection tree."""
+    """
+    Visualize the project structure including modules and their members.
+
+    Args:
+        modules: List of module paths to introspect.
+        project_name: Optional project name override.
+    """
     loader = GriffeLoader()
     project = loader.load_project(list(modules), project_name)
 
@@ -49,6 +63,9 @@ def tree(
 
 
 def _print_object(obj, indent: str) -> None:
+    """
+    Recursive helper to print doc objects.
+    """
     click.echo(f"{indent}├── {obj.name}")
     for member in obj.get_all_members():
         _print_object(member, indent + "│   ")
@@ -78,7 +95,14 @@ def generate(
     project_name: Optional[str],
     docs_dir: Path,
 ) -> None:
-    """Generate documentation source files using MkDocs renderer."""
+    """
+    Generate Markdown source files for the specified module.
+
+    Args:
+        module: The primary module path to document.
+        project_name: Optional project name override.
+        docs_dir: Directory where documentation sources will be written.
+    """
     loader = GriffeLoader()
     discovered_paths = discover_module_paths(
         module,
@@ -105,7 +129,12 @@ def generate(
     default=Path("mkdocs.yml"),
 )
 def build(mkdocs_yml: Path) -> None:
-    """Build documentation using MkDocs."""
+    """
+    Build the documentation site using MkDocs.
+
+    Args:
+        mkdocs_yml: Path to the mkdocs.yml configuration file.
+    """
     if not mkdocs_yml.exists():
         raise click.ClickException(f"mkdocs.yml not found: {mkdocs_yml}")
 
@@ -128,7 +157,12 @@ def build(mkdocs_yml: Path) -> None:
     default=Path("mkdocs.yml"),
 )
 def serve(mkdocs_yml: Path) -> None:
-    """Serve documentation using MkDocs."""
+    """
+    Serve the documentation site with live-reload using MkDocs.
+
+    Args:
+        mkdocs_yml: Path to the mkdocs.yml configuration file.
+    """
     if not mkdocs_yml.exists():
         raise click.ClickException(f"mkdocs.yml not found: {mkdocs_yml}")
 
@@ -147,6 +181,9 @@ def serve(mkdocs_yml: Path) -> None:
 # ---------------------------------------------------------------------
 
 def main() -> None:
+    """
+    CLI Entry point.
+    """
     cli()
 
 
diff --git a/docforge/cli/mkdocs.py b/docforge/cli/mkdocs.py
index 88529c1..df9210f 100644
--- a/docforge/cli/mkdocs.py
+++ b/docforge/cli/mkdocs.py
@@ -1,3 +1,8 @@
+"""
+This module contains the 'mkdocs' CLI command, which orchestrates the generation
+of the main mkdocs.yml configuration file.
+"""
+
 from pathlib import Path
 from importlib import resources
 
@@ -10,6 +15,16 @@ from docforge.nav import MkDocsNavEmitter
 
 
 def _load_template(template: Path | None) -> dict:
+    """
+    Load a YAML template for mkdocs.yml. If no template is provided,
+    loads the built-in sample template.
+
+    Args:
+        template: Path to the template file, or None.
+
+    Returns:
+        The loaded template data as a dictionary.
+    """
     if template is not None:
         if not template.exists():
             raise click.FileError(str(template), hint="Template not found")
@@ -59,7 +74,17 @@ def mkdocs_cmd(
     out: Path,
     site_name: str,
 ) -> None:
-    """Generate mkdocs.yml from nav spec and template."""
+    """
+    Generate an mkdocs.yml configuration file by combining a template with
+    the navigation structure resolved from a docforge.nav.yml file.
+
+    Args:
+        docs_dir: Path to the directory containing documentation Markdown files.
+        nav_file: Path to the docforge.nav.yml specification.
+        template: Optional path to an mkdocs.yml template.
+        out: Path where the final mkdocs.yml will be written.
+        site_name: The name of the documentation site.
+    """
 
     if not nav_file.exists():
         raise click.FileError(str(nav_file), hint="Nav spec not found")
diff --git a/docforge/loader/__init__.py b/docforge/loader/__init__.py
index 10ac315..6512b4f 100644
--- a/docforge/loader/__init__.py
+++ b/docforge/loader/__init__.py
@@ -1,3 +1,19 @@
+"""
+# Loader Layer
+
+The `docforge.loader` package is responsible for discovering Python source files
+and extracting their documentation using static analysis.
+
+## Core Features
+
+- **Discovery**: Automatically find all modules and packages in a project
+  directory.
+- **Introspection**: Uses `griffe` to parse docstrings, signatures, and
+  hierarchical relationships without executing the code.
+- **Filtering**: Automatically excludes private members (prefixed with `_`) to
+  ensure clean public documentation.
+"""
+
 from .griffe_loader import GriffeLoader, discover_module_paths
 
 __all__ = [
diff --git a/docforge/loader/griffe_loader.py b/docforge/loader/griffe_loader.py
index 9873458..bbf2b18 100644
--- a/docforge/loader/griffe_loader.py
+++ b/docforge/loader/griffe_loader.py
@@ -1,3 +1,8 @@
+"""
+This module provides the GriffeLoader, which uses the 'griffe' library to
+introspect Python source code and populate the doc-forge Project model.
+"""
+
 import logging
 from pathlib import Path
 from typing import List, Optional
@@ -23,9 +28,16 @@ def discover_module_paths(
     Discover all Python modules under a package via filesystem traversal.
 
     Rules:
-    - Directory with __init__.py => package
-    - .py file => module
-    - Paths converted to dotted module paths
+    - Directory with __init__.py is treated as a package.
+    - Any .py file is treated as a module.
+    - All paths are converted to dotted module paths.
+
+    Args:
+        module_name: The name of the package to discover.
+        project_root: The root directory of the project. Defaults to current working directory.
+
+    Returns:
+        A sorted list of dotted module paths.
     """
 
     if project_root is None:
@@ -51,9 +63,14 @@ def discover_module_paths(
 
 
 class GriffeLoader:
-    """Loads Python modules using Griffe introspection."""
+    """
+    Loads Python modules and extracts documentation using the Griffe introspection engine.
+    """
 
     def __init__(self) -> None:
+        """
+        Initialize the GriffeLoader.
+        """
         self._loader = _GriffeLoader(
             modules_collection=ModulesCollection(),
             lines_collection=LinesCollection(),
@@ -65,6 +82,17 @@ class GriffeLoader:
         project_name: Optional[str] = None,
         skip_import_errors: bool = None,
     ) -> Project:
+        """
+        Load multiple modules and combine them into a single Project model.
+
+        Args:
+            module_paths: A list of dotted paths to the modules to load.
+            project_name: Optional name for the project. Defaults to the first module name.
+            skip_import_errors: If True, modules that fail to import will be skipped.
+
+        Returns:
+            A Project instance containing the loaded modules.
+        """
         if not module_paths:
             raise ValueError("At least one module path must be provided")
 
@@ -87,6 +115,15 @@ class GriffeLoader:
         return project
 
     def load_module(self, path: str) -> Module:
+        """
+        Load a single module and convert its introspection data into the docforge model.
+
+        Args:
+            path: The dotted path of the module to load.
+
+        Returns:
+            A Module instance.
+        """
         self._loader.load(path)
         griffe_module = self._loader.modules_collection[path]
 
diff --git a/docforge/model/__init__.py b/docforge/model/__init__.py
index aa81bf9..19b9ee8 100644
--- a/docforge/model/__init__.py
+++ b/docforge/model/__init__.py
@@ -1,8 +1,17 @@
 """
-Core documentation model for doc-forge.
+# Model Layer
 
-These classes form the renderer-agnostic, introspection-derived
-representation of Python documentation.
+The `docforge.model` package provides the core data structures used to represent
+Python source code in a documentation-focused hierarchy.
+
+## Key Components
+
+- **Project**: The root container for all documented modules.
+- **Module**: Represents a Python module or package, containing members.
+- **DocObject**: A recursive structure for classes, functions, and attributes.
+
+These classes are designed to be renderer-agnostic, allowing the same internal
+representation to be transformed into various output formats (currently MkDocs).
 """
 
 from .project import Project
diff --git a/docforge/model/module.py b/docforge/model/module.py
index c7908f5..e741a55 100644
--- a/docforge/model/module.py
+++ b/docforge/model/module.py
@@ -1,25 +1,66 @@
+"""
+This module defines the Module class, which represents a Python module or package
+in the doc-forge documentation model. It acts as a container for top-level
+documented objects.
+"""
+
 from typing import Dict, Iterable, Optional
 
 from docforge.model.object import DocObject
 
 
 class Module:
-    """Represents a documented Python module."""
+    """
+    Represents a documented Python module or package.
+
+    Attributes:
+        path: Dotted import path of the module.
+        docstring: Module-level docstring content.
+        members: Dictionary mapping object names to their DocObject representations.
+    """
 
     def __init__(
         self,
         path: str,
         docstring: Optional[str] = None,
     ) -> None:
+        """
+        Initialize a new Module.
+
+        Args:
+            path: The dotted path of the module.
+            docstring: The module's docstring, if any.
+        """
         self.path = path
         self.docstring = docstring
         self.members: Dict[str, DocObject] = {}
 
     def add_object(self, obj: DocObject) -> None:
+        """
+        Add a documented object to the module.
+
+        Args:
+            obj: The object to add.
+        """
         self.members[obj.name] = obj
 
     def get_object(self, name: str) -> DocObject:
+        """
+        Retrieve a member object by name.
+
+        Args:
+            name: The name of the object.
+
+        Returns:
+            The requested DocObject.
+        """
         return self.members[name]
 
     def get_all_objects(self) -> Iterable[DocObject]:
+        """
+        Get all top-level objects in the module.
+
+        Returns:
+            An iterable of DocObject instances.
+        """
         return self.members.values()
diff --git a/docforge/model/object.py b/docforge/model/object.py
index 8edb79c..e1b625d 100644
--- a/docforge/model/object.py
+++ b/docforge/model/object.py
@@ -1,8 +1,24 @@
+"""
+This module defines the DocObject class, the fundamental recursive unit of the
+doc-forge documentation model. A DocObject represents a single Python entity
+(class, function, method, or attribute) and its nested members.
+"""
+
 from typing import Dict, Iterable, Optional
 
 
 class DocObject:
-    """Represents a documented Python object."""
+    """
+    Represents a documented Python object (class, function, method, etc.).
+
+    Attributes:
+        name: Local name of the object.
+        kind: Type of object (e.g., 'class', 'function', 'attribute').
+        path: Full dotted import path to the object.
+        signature: Callable signature, if applicable.
+        docstring: Raw docstring content extracted from the source.
+        members: Dictionary mapping member names to their DocObject representations.
+    """
 
     def __init__(
         self,
@@ -12,6 +28,16 @@ class DocObject:
         signature: Optional[str] = None,
         docstring: Optional[str] = None,
     ) -> None:
+        """
+        Initialize a new DocObject.
+
+        Args:
+            name: The local name of the object.
+            kind: The kind of object (e.g., 'class', 'function').
+            path: The full dotted path to the object.
+            signature: The object's signature (for callable objects).
+            docstring: The object's docstring, if any.
+        """
         self.name = name
         self.kind = kind
         self.path = path
@@ -20,10 +46,31 @@ class DocObject:
         self.members: Dict[str, 'DocObject'] = {}
 
     def add_member(self, obj: 'DocObject') -> None:
+        """
+        Add a child member to this object (e.g., a method to a class).
+
+        Args:
+            obj: The child DocObject to add.
+        """
         self.members[obj.name] = obj
 
     def get_member(self, name: str) -> 'DocObject':
+        """
+        Retrieve a child member by name.
+
+        Args:
+            name: The name of the member.
+
+        Returns:
+            The requested DocObject.
+        """
         return self.members[name]
 
     def get_all_members(self) -> Iterable['DocObject']:
+        """
+        Get all members of this object.
+
+        Returns:
+            An iterable of child DocObject instances.
+        """
         return self.members.values()
diff --git a/docforge/model/project.py b/docforge/model/project.py
index 46fdeeb..c444958 100644
--- a/docforge/model/project.py
+++ b/docforge/model/project.py
@@ -1,23 +1,67 @@
+"""
+This module defines the Project class, the top-level container for a documented
+project. It aggregates multiple Module instances into a single named entity.
+"""
+
 from typing import Dict, Iterable
 
 from docforge.model.module import Module
 
 
 class Project:
-    """Represents a documentation project."""
+    """
+    Represents a documentation project, serving as a container for modules.
+
+    Attributes:
+        name: Name of the project.
+        modules: Dictionary mapping module paths to Module instances.
+    """
 
     def __init__(self, name: str) -> None:
+        """
+        Initialize a new Project.
+
+        Args:
+            name: The name of the project.
+        """
         self.name = name
         self.modules: Dict[str, Module] = {}
 
     def add_module(self, module: Module) -> None:
+        """
+        Add a module to the project.
+
+        Args:
+            module: The module to add.
+        """
         self.modules[module.path] = module
 
     def get_module(self, path: str) -> Module:
+        """
+        Retrieve a module by its dotted path.
+
+        Args:
+            path: The dotted path of the module (e.g., 'pkg.mod').
+
+        Returns:
+            The requested Module.
+        """
         return self.modules[path]
 
     def get_all_modules(self) -> Iterable[Module]:
+        """
+        Get all modules in the project.
+
+        Returns:
+            An iterable of Module objects.
+        """
         return self.modules.values()
 
     def get_module_list(self) -> list[str]:
+        """
+        Get the list of all module dotted paths.
+
+        Returns:
+            A list of module paths.
+        """
         return list(self.modules.keys())
diff --git a/docforge/nav/__init__.py b/docforge/nav/__init__.py
index 2db95eb..7a2aa94 100644
--- a/docforge/nav/__init__.py
+++ b/docforge/nav/__init__.py
@@ -1,3 +1,19 @@
+"""
+# Navigation Layer
+
+The `docforge.nav` package manages the mapping between the logical documentation
+structure and the physical files on disk.
+
+## Workflow
+
+1.  **Spec Definition**: Users define navigation intent in `docforge.nav.yml`.
+2.  **Resolution**: `resolve_nav` matches patterns in the spec to generated `.md` files.
+3.  **Emission**: `MkDocsNavEmitter` produces the final YAML structure for `mkdocs.yml`.
+
+This abstraction allows doc-forge to support complex grouping and ordering
+independently of the source code's physical layout.
+"""
+
 from .spec import NavSpec, load_nav_spec
 from .resolver import ResolvedNav, resolve_nav
 from .mkdocs import MkDocsNavEmitter
diff --git a/docforge/nav/mkdocs.py b/docforge/nav/mkdocs.py
index c1d516c..d304cf8 100644
--- a/docforge/nav/mkdocs.py
+++ b/docforge/nav/mkdocs.py
@@ -1,3 +1,9 @@
+"""
+This module provides the MkDocsNavEmitter, which converts a ResolvedNav instance
+into the specific YAML-ready list structure expected by the MkDocs 'nav'
+configuration.
+"""
+
 from pathlib import Path
 from typing import List, Dict, Any
 
@@ -5,9 +11,21 @@ from docforge.nav.resolver import ResolvedNav
 
 
 class MkDocsNavEmitter:
-    """Emit MkDocs-compatible nav structures."""
+    """
+    Emitter responsible for transforming a ResolvedNav into an MkDocs-compatible
+    navigation structure.
+    """
 
     def emit(self, nav: ResolvedNav) -> List[Dict[str, Any]]:
+        """
+        Generate a list of navigation entries for mkdocs.yml.
+
+        Args:
+            nav: The resolved navigation data.
+
+        Returns:
+            A list of dictionary mappings representing the MkDocs navigation.
+        """
         result: List[Dict[str, Any]] = []
 
         # Home entry (semantic path)
@@ -27,7 +45,16 @@ class MkDocsNavEmitter:
 
     def _to_relative(self, path: Path, docs_root: Path | None) -> str:
         """
-        Convert a filesystem path to a docs-relative path.
+        Convert a filesystem path to a path relative to the documentation root.
+        This handles both absolute and relative filesystem paths, ensuring the
+        output is compatible with MkDocs navigation requirements.
+
+        Args:
+            path: The path to convert.
+            docs_root: The root directory for documentation.
+
+        Returns:
+            A string representing the relative POSIX-style path.
         """
         if docs_root and path.is_absolute():
             try:
diff --git a/docforge/nav/resolver.py b/docforge/nav/resolver.py
index f62ee46..3333ab6 100644
--- a/docforge/nav/resolver.py
+++ b/docforge/nav/resolver.py
@@ -1,3 +1,9 @@
+"""
+This module contains the logic for resolving a NavSpec against the physical
+filesystem. It expands globs and validates that all referenced documents
+actually exist on disk.
+"""
+
 from pathlib import Path
 from typing import Dict, Iterable, List
 
@@ -7,17 +13,40 @@ from docforge.nav.spec import NavSpec
 
 
 class ResolvedNav:
+    """
+    Represents a navigation structure where all patterns and paths have been
+    resolved against the actual filesystem contents.
+
+    Attributes:
+        home: Resolved relative path to the home page.
+        groups: Mapping of group titles to lists of absolute or relative Path objects.
+    """
+
     def __init__(
         self,
         home: str | None,
         groups: Dict[str, List[Path]],
         docs_root: Path | None = None,
     ) -> None:
+        """
+        Initialize a ResolvedNav instance.
+
+        Args:
+            home: The relative path to the project home page.
+            groups: A mapping of group names to their resolved filesystem paths.
+            docs_root: The root documentation directory.
+        """
         self.home = home
         self.groups = groups
         self._docs_root = docs_root
 
     def all_files(self) -> Iterable[Path]:
+        """
+        Get an iterable of all resolved files in the navigation structure.
+
+        Returns:
+            An iterable of Path objects.
+        """
         if self.home:
             if self._docs_root is None:
                 raise RuntimeError("docs_root is required to resolve home path")
@@ -31,6 +60,20 @@ def resolve_nav(
     spec: NavSpec,
     docs_root: Path,
 ) -> ResolvedNav:
+    """
+    Create a ResolvedNav by processing a NavSpec against the filesystem.
+    This expands globs and validates the existence of referenced files.
+
+    Args:
+        spec: The navigation specification to resolve.
+        docs_root: The root directory for documentation files.
+
+    Returns:
+        A ResolvedNav instance.
+
+    Raises:
+        FileNotFoundError: If a pattern doesn't match any files or the docs_root doesn't exist.
+    """
     if not docs_root.exists():
         raise FileNotFoundError(docs_root)
 
diff --git a/docforge/nav/spec.py b/docforge/nav/spec.py
index 226aeae..c7cc784 100644
--- a/docforge/nav/spec.py
+++ b/docforge/nav/spec.py
@@ -1,3 +1,9 @@
+"""
+This module defines the NavSpec class, which represents the user's intent for
+documentation navigation as defined in a YAML specification (usually
+docforge.nav.yml).
+"""
+
 from pathlib import Path
 from typing import Dict, List, Optional
 
@@ -5,18 +11,44 @@ import yaml
 
 
 class NavSpec:
-    """Parsed representation of docforge.nav.yml."""
+    """
+    Parsed representation of the docforge navigation specification file.
+
+    Attributes:
+        home: Path to the home document (e.g., 'index.md').
+        groups: Mapping of group titles to lists of path patterns/globs.
+    """
 
     def __init__(
         self,
         home: Optional[str],
         groups: Dict[str, List[str]],
     ) -> None:
+        """
+        Initialize a NavSpec.
+
+        Args:
+            home: The path to the home document.
+            groups: A mapping of group names to lists of path patterns (globs).
+        """
         self.home = home
         self.groups = groups
 
     @classmethod
     def load(cls, path: Path) -> "NavSpec":
+        """
+        Load a NavSpec from a YAML file.
+
+        Args:
+            path: The filesystem path to the YAML file.
+
+        Returns:
+            A NavSpec instance.
+
+        Raises:
+            FileNotFoundError: If the path does not exist.
+            ValueError: If the file content is not a valid NavSpec mapping.
+        """
         if not path.exists():
             raise FileNotFoundError(path)
 
@@ -45,6 +77,12 @@ class NavSpec:
         return cls(home=home, groups=groups)
 
     def all_patterns(self) -> List[str]:
+        """
+        Get all path patterns referenced in the specification.
+
+        Returns:
+            A list of all patterns (home plus all groups).
+        """
         patterns: List[str] = []
         if self.home:
             patterns.append(self.home)
@@ -54,6 +92,15 @@ class NavSpec:
 
 
 def load_nav_spec(path: Path) -> NavSpec:
+    """
+    Utility function to load a NavSpec from a file.
+
+    Args:
+        path: Path to the navigation specification file.
+
+    Returns:
+        A loaded NavSpec instance.
+    """
     if not path.exists():
         raise FileNotFoundError(path)
 
diff --git a/docforge/renderers/__init__.py b/docforge/renderers/__init__.py
index 732f508..fb9792a 100644
--- a/docforge/renderers/__init__.py
+++ b/docforge/renderers/__init__.py
@@ -1,3 +1,22 @@
+"""
+# Renderers Layer
+
+The `docforge.renderers` package handles the transformation of the internal
+documentation model into physical files formatted for specific documentation
+engines.
+
+## Current Implementations
+
+- **MkDocsRenderer**: Generates Markdown files utilizing the `mkdocstrings`
+  syntax. It automatically handles package/module hierarchy and generates
+  `index.md` files for packages.
+
+## Extending
+
+To add a new renderer, implement the `DocRenderer` protocol defined in
+`docforge.renderers.base`.
+"""
+
 from .mkdocs import MkDocsRenderer
 
 __all__ = [
diff --git a/docforge/renderers/base.py b/docforge/renderers/base.py
index d3e7d30..b630a0c 100644
--- a/docforge/renderers/base.py
+++ b/docforge/renderers/base.py
@@ -1,11 +1,46 @@
+"""
+This module defines the base interfaces and configuration containers for
+doc-forge renderers. All renderer implementations should adhere to the
+DocRenderer protocol.
+"""
+
 from pathlib import Path
+from typing import Protocol
 
 from docforge.model import Project
 
 
 class RendererConfig:
-    """Renderer configuration container."""
+    """
+    Configuration container for documentation renderers.
+
+    Args:
+        out_dir: The directory where documentation files should be written.
+        project: The introspected project model to be rendered.
+    """
 
     def __init__(self, out_dir: Path, project: Project) -> None:
         self.out_dir = out_dir
         self.project = project
+
+
+class DocRenderer(Protocol):
+    """
+    Protocol defining the interface for documentation renderers.
+    """
+
+    name: str
+
+    def generate_sources(
+        self,
+        project: Project,
+        out_dir: Path,
+    ) -> None:
+        """
+        Generate renderer-specific source files for the given project.
+
+        Args:
+            project: The project model containing modules and objects.
+            out_dir: Target directory for the generated files.
+        """
+        ...
diff --git a/docforge/renderers/mkdocs.py b/docforge/renderers/mkdocs.py
index 1c51c75..9d9f5e3 100644
--- a/docforge/renderers/mkdocs.py
+++ b/docforge/renderers/mkdocs.py
@@ -1,14 +1,30 @@
+"""
+This module implements the MkDocsRenderer, which generates Markdown source files
+compatible with the MkDocs 'material' theme and 'mkdocstrings' extension.
+"""
+
 from pathlib import Path
 
 from docforge.model import Project
 
 
 class MkDocsRenderer:
-    """MkDocs source generator using mkdocstrings."""
+    """
+    Renderer that generates Markdown source files formatted for the MkDocs
+    'mkdocstrings' plugin.
+    """
 
     name = "mkdocs"
 
     def generate_sources(self, project: Project, out_dir: Path) -> None:
+        """
+        Produce a set of Markdown files in the output directory based on the
+        provided Project model.
+
+        Args:
+            project: The project model to render.
+            out_dir: Target directory for documentation files.
+        """
         modules = list(project.get_all_modules())
         paths = {m.path for m in modules}
 
@@ -25,6 +41,15 @@ class MkDocsRenderer:
     # Internal helpers
     # -------------------------
     def _write_module(self, module, packages: set[str], out_dir: Path) -> None:
+        """
+        Write a single module's documentation file. Packages are written as
+        'index.md' inside their respective directories.
+
+        Args:
+            module: The module to write.
+            packages: A set of module paths that are identified as packages.
+            out_dir: The base output directory.
+        """
         parts = module.path.split(".")
 
         if module.path in packages:
@@ -50,6 +75,16 @@ class MkDocsRenderer:
         md_path.write_text(content, encoding="utf-8")
 
     def _render_markdown(self, title: str, module_path: str) -> str:
+        """
+        Generate the Markdown content for a module file.
+
+        Args:
+            title: The display title for the page.
+            module_path: The dotted path of the module to document.
+
+        Returns:
+            A string containing the Markdown source.
+        """
         return (
             f"# {title}\n\n"
             f"::: {module_path}\n"