diff --git a/bases/polylith/cli/core.py b/bases/polylith/cli/core.py
index d97d825d..1fb5c4d3 100644
--- a/bases/polylith/cli/core.py
+++ b/bases/polylith/cli/core.py
@@ -1,6 +1,6 @@
 from pathlib import Path
 
-from polylith import commands, info, repo, workspace
+from polylith import commands, configuration, info, repo
 from polylith.cli import create, options
 from typer import Exit, Option, Typer
 from typing_extensions import Annotated
@@ -30,7 +30,7 @@ def check_command(
 ):
     """Validates the Polylith workspace."""
     root = repo.get_workspace_root(Path.cwd())
-    ns = workspace.parser.get_namespace_from_config(root)
+    ns = configuration.get_namespace_from_config(root)
 
     all_projects_data = info.get_projects_data(root, ns)
     only_projects_data = [p for p in all_projects_data if info.is_project(p)]
@@ -68,7 +68,7 @@ def libs_command(
 ):
     """Show third-party libraries used in the workspace."""
     root = repo.get_workspace_root(Path.cwd())
-    ns = workspace.parser.get_namespace_from_config(root)
+    ns = configuration.get_namespace_from_config(root)
 
     projects_data = info.get_projects_data(root, ns)
 
@@ -94,7 +94,7 @@ def sync_command(
 ):
     """Update pyproject.toml with missing bricks."""
     root = repo.get_workspace_root(Path.cwd())
-    ns = workspace.parser.get_namespace_from_config(root)
+    ns = configuration.get_namespace_from_config(root)
 
     projects_data = info.get_projects_data(root, ns)
 
diff --git a/bases/polylith/pdm_workspace_hooks/core.py b/bases/polylith/pdm_workspace_hooks/core.py
index d58cf3cc..e9df6c79 100644
--- a/bases/polylith/pdm_workspace_hooks/core.py
+++ b/bases/polylith/pdm_workspace_hooks/core.py
@@ -1,4 +1,6 @@
-import os
+from pathlib import Path
+
+from polylith.pdm.hooks.workspace import build_initialize
 
 
 def pdm_build_initialize(context):
@@ -8,8 +10,9 @@ def pdm_build_initialize(context):
     """
 
     context.ensure_build_dir()
-    filepath = os.path.join(context.build_dir, "polylith_workspace.pth")
 
-    with open(filepath, "w") as f:
-        f.write(f"{context.config.root}/bases\n")
-        f.write(f"{context.config.root}/components\n")
+    data = context.config.data
+    build_dir = Path(context.build_dir)
+    root = Path(context.config.root)
+
+    build_initialize(data, build_dir, root)
diff --git a/components/polylith/bricks/brick.py b/components/polylith/bricks/brick.py
index 597fdbe4..f3da7dce 100644
--- a/components/polylith/bricks/brick.py
+++ b/components/polylith/bricks/brick.py
@@ -1,10 +1,10 @@
 from pathlib import Path
 
+from polylith import configuration
 from polylith.dirs import create_dir
 from polylith.files import create_file
 from polylith.interface import create_interface
 from polylith.readme import create_brick_readme
-from polylith.workspace import parser
 
 
 def create_brick(root: Path, options: dict) -> None:
@@ -13,8 +13,8 @@ def create_brick(root: Path, options: dict) -> None:
         k: v for k, v in options.items() if k in {"brick", "namespace", "package"}
     }
 
-    brick_structure = parser.get_brick_structure_from_config(root)
-    resources_structure = parser.get_resources_structure_from_config(root)
+    brick_structure = configuration.get_brick_structure_from_config(root)
+    resources_structure = configuration.get_resources_structure_from_config(root)
 
     brick_path = brick_structure.format(**path_kwargs)
     resources_path = resources_structure.format(**path_kwargs)
@@ -23,5 +23,5 @@ def create_brick(root: Path, options: dict) -> None:
     create_file(d, f"{modulename}.py")
     create_interface(d, options)
 
-    if parser.is_readme_generation_enabled(root):
+    if configuration.is_readme_generation_enabled(root):
         create_brick_readme(root / resources_path, options)
diff --git a/components/polylith/bricks/component.py b/components/polylith/bricks/component.py
index deed2078..128602f2 100644
--- a/components/polylith/bricks/component.py
+++ b/components/polylith/bricks/component.py
@@ -1,7 +1,7 @@
 from pathlib import Path
 from typing import List
 
-from polylith import workspace
+from polylith import configuration
 from polylith.bricks.brick import create_brick
 from polylith.repo import components_dir
 from polylith.test import create_test
@@ -20,7 +20,7 @@ def is_brick_dir(p: Path) -> bool:
 
 
 def get_component_dirs(root: Path, top_dir, ns) -> list:
-    theme = workspace.parser.get_theme_from_config(root)
+    theme = configuration.get_theme_from_config(root)
     dirs = top_dir if theme == "tdd" else f"{top_dir}/{ns}"
 
     component_dir = root / dirs
diff --git a/components/polylith/commands/create.py b/components/polylith/commands/create.py
index a43973c7..5c0bb401 100644
--- a/components/polylith/commands/create.py
+++ b/components/polylith/commands/create.py
@@ -1,11 +1,12 @@
 from pathlib import Path
 from typing import Union
-from polylith import repo, workspace
+
+from polylith import configuration, repo
 
 
 def create(name: Union[str, None], description: Union[str, None], fn):
     root = repo.get_workspace_root(Path.cwd())
-    namespace = workspace.parser.get_namespace_from_config(root)
+    namespace = configuration.get_namespace_from_config(root)
 
     if not name:
         raise ValueError("Please add a name by using --name")
diff --git a/components/polylith/commands/diff.py b/components/polylith/commands/diff.py
index 766b17b2..478223dd 100644
--- a/components/polylith/commands/diff.py
+++ b/components/polylith/commands/diff.py
@@ -1,11 +1,11 @@
 from pathlib import Path
-
 from typing import Union
-from polylith import diff, info, repo, workspace
+
+from polylith import configuration, diff, info, repo
 
 
 def print_views(root: Path, tag: str, short: bool, only_bricks: bool) -> None:
-    ns = workspace.parser.get_namespace_from_config(root)
+    ns = configuration.get_namespace_from_config(root)
     files = diff.collect.get_files(tag)
     bases = diff.collect.get_changed_bases(files, ns)
     components = diff.collect.get_changed_components(files, ns)
diff --git a/components/polylith/commands/info.py b/components/polylith/commands/info.py
index a41fd931..85baef2e 100644
--- a/components/polylith/commands/info.py
+++ b/components/polylith/commands/info.py
@@ -1,12 +1,12 @@
 from pathlib import Path
 
-from polylith import info, repo, workspace
+from polylith import configuration, info, repo
 
 
 def run(short: bool):
     root = repo.get_workspace_root(Path.cwd())
 
-    ns = workspace.parser.get_namespace_from_config(root)
+    ns = configuration.get_namespace_from_config(root)
     bases = info.get_bases(root, ns)
     components = info.get_components(root, ns)
     projects_data = info.get_bricks_in_projects(root, components, bases, ns)
diff --git a/components/polylith/configuration/__init__.py b/components/polylith/configuration/__init__.py
new file mode 100644
index 00000000..9bbcaa45
--- /dev/null
+++ b/components/polylith/configuration/__init__.py
@@ -0,0 +1,21 @@
+from polylith.configuration.core import (
+    get_brick_structure_from_config,
+    get_namespace_from_config,
+    get_resources_structure_from_config,
+    get_tag_pattern_from_config,
+    get_tests_structure_from_config,
+    get_theme_from_config,
+    is_readme_generation_enabled,
+    is_test_generation_enabled,
+)
+
+__all__ = [
+    "get_brick_structure_from_config",
+    "get_namespace_from_config",
+    "get_resources_structure_from_config",
+    "get_tag_pattern_from_config",
+    "get_tests_structure_from_config",
+    "get_theme_from_config",
+    "is_readme_generation_enabled",
+    "is_test_generation_enabled",
+]
diff --git a/components/polylith/workspace/parser.py b/components/polylith/configuration/core.py
similarity index 100%
rename from components/polylith/workspace/parser.py
rename to components/polylith/configuration/core.py
diff --git a/components/polylith/diff/collect.py b/components/polylith/diff/collect.py
index 2257054a..e3e79de0 100644
--- a/components/polylith/diff/collect.py
+++ b/components/polylith/diff/collect.py
@@ -2,7 +2,7 @@
 from pathlib import Path
 from typing import List, Set, Union
 
-from polylith import repo, workspace
+from polylith import configuration, repo
 
 
 def _parse_folder_parts(folder: str, changed_file: Path) -> str:
@@ -42,7 +42,7 @@ def get_changed_projects(changed_files: List[Path]) -> list:
 
 
 def get_latest_tag(root: Path, key: Union[str, None]) -> Union[str, None]:
-    tag_pattern = workspace.parser.get_tag_pattern_from_config(root, key)
+    tag_pattern = configuration.get_tag_pattern_from_config(root, key)
 
     res = subprocess.run(
         ["git", "tag", "-l", "--sort=-committerdate", f"{tag_pattern}"],
diff --git a/components/polylith/libs/grouping.py b/components/polylith/libs/grouping.py
index f0db7b90..4b563210 100644
--- a/components/polylith/libs/grouping.py
+++ b/components/polylith/libs/grouping.py
@@ -2,7 +2,7 @@
 from pathlib import Path
 from typing import Set
 
-from polylith import workspace
+from polylith import configuration
 from polylith.imports import extract_top_ns, fetch_all_imports
 from polylith.libs.stdlib import standard_libs
 
@@ -42,7 +42,7 @@ def extract_third_party_imports(all_imports: dict, top_ns: str) -> dict:
 
 
 def get_third_party_imports(root: Path, paths: Set[Path]) -> dict:
-    top_ns = workspace.parser.get_namespace_from_config(root)
+    top_ns = configuration.get_namespace_from_config(root)
 
     all_imports = fetch_all_imports(paths)
 
diff --git a/components/polylith/pdm/hooks/workspace.py b/components/polylith/pdm/hooks/workspace.py
new file mode 100644
index 00000000..65e43409
--- /dev/null
+++ b/components/polylith/pdm/hooks/workspace.py
@@ -0,0 +1,38 @@
+from pathlib import Path
+from typing import Set
+
+from polylith import configuration, toml
+
+
+def paths_from_config(ns: str, data: dict) -> Set[str]:
+    packages = toml.get_project_package_includes(ns, data)
+
+    return {p["from"] for p in packages}
+
+
+def parse_paths(root: Path, theme: str, ns: str, data: dict) -> Set[str]:
+    defaults = {"bases", "components"}
+
+    paths = defaults if theme == "loose" else paths_from_config(ns, data)
+
+    return {(root / p).as_posix() for p in paths}
+
+
+def write_pth_file(build_dir: Path, paths: Set[str]) -> None:
+    filepath = build_dir / "polylith_workspace.pth"
+
+    with open(filepath, "w") as f:
+        for p in paths:
+            f.write(f"{p}\n")
+
+
+def build_initialize(config_data: dict, build_dir: Path, root: Path) -> None:
+    theme = configuration.get_theme_from_config(root)
+    ns = configuration.get_namespace_from_config(root)
+
+    paths = parse_paths(root, theme, ns, config_data)
+
+    if not paths:
+        return
+
+    write_pth_file(build_dir, paths)
diff --git a/components/polylith/poetry/commands/check.py b/components/polylith/poetry/commands/check.py
index f503ca27..07886450 100644
--- a/components/polylith/poetry/commands/check.py
+++ b/components/polylith/poetry/commands/check.py
@@ -2,7 +2,7 @@
 
 from cleo.helpers import option
 from poetry.console.commands.command import Command
-from polylith import commands, info, repo, workspace
+from polylith import commands, configuration, info, repo
 from polylith.poetry import internals
 
 command_options = [
@@ -52,7 +52,7 @@ def print_report(self, root: Path, ns: str, project_data: dict) -> bool:
     def handle(self) -> int:
         directory = self.option("directory")
         root = repo.get_workspace_root(Path.cwd())
-        ns = workspace.parser.get_namespace_from_config(root)
+        ns = configuration.get_namespace_from_config(root)
 
         all_projects_data = info.get_projects_data(root, ns)
         only_projects_data = [p for p in all_projects_data if info.is_project(p)]
diff --git a/components/polylith/poetry/commands/libs.py b/components/polylith/poetry/commands/libs.py
index 97ba70e5..b63182f0 100644
--- a/components/polylith/poetry/commands/libs.py
+++ b/components/polylith/poetry/commands/libs.py
@@ -1,7 +1,7 @@
 from pathlib import Path
 
 from poetry.console.commands.command import Command
-from polylith import commands, info, repo, workspace
+from polylith import commands, configuration, info, repo
 from polylith.poetry.commands.check import command_options
 from polylith.poetry.internals import filter_projects_data, find_third_party_libs
 
@@ -33,7 +33,7 @@ def print_report(self, root: Path, ns: str, data: dict) -> bool:
     def handle(self) -> int:
         directory = self.option("directory")
         root = repo.get_workspace_root(Path.cwd())
-        ns = workspace.parser.get_namespace_from_config(root)
+        ns = configuration.get_namespace_from_config(root)
 
         all_projects_data = info.get_projects_data(root, ns)
         projects_data = filter_projects_data(self.poetry, directory, all_projects_data)
diff --git a/components/polylith/poetry/commands/sync.py b/components/polylith/poetry/commands/sync.py
index e2c6c1c7..a44434a7 100644
--- a/components/polylith/poetry/commands/sync.py
+++ b/components/polylith/poetry/commands/sync.py
@@ -1,7 +1,7 @@
 from pathlib import Path
 
 from poetry.console.commands.command import Command
-from polylith import commands, info, repo, workspace
+from polylith import commands, configuration, info, repo
 from polylith.poetry.internals import filter_projects_data
 
 
@@ -12,7 +12,7 @@ class SyncCommand(Command):
     def handle(self) -> int:
         directory = self.option("directory")
         root = repo.get_workspace_root(Path.cwd())
-        ns = workspace.parser.get_namespace_from_config(root)
+        ns = configuration.get_namespace_from_config(root)
 
         all_projects_data = info.get_projects_data(root, ns)
         projects_data = filter_projects_data(self.poetry, directory, all_projects_data)
diff --git a/components/polylith/project/get.py b/components/polylith/project/get.py
index c770089b..8cb4b3b3 100644
--- a/components/polylith/project/get.py
+++ b/components/polylith/project/get.py
@@ -3,7 +3,7 @@
 from typing import List
 
 import tomlkit
-from polylith import repo, toml, workspace
+from polylith import configuration, repo, toml
 
 
 def get_project_name(data) -> str:
@@ -43,7 +43,7 @@ def get_toml_files(root: Path) -> List[dict]:
 
 def get_packages_for_projects(root: Path) -> List[dict]:
     toml_files = get_toml_files(root)
-    namespace = workspace.parser.get_namespace_from_config(root)
+    namespace = configuration.get_namespace_from_config(root)
 
     return [
         {
diff --git a/components/polylith/sync/update.py b/components/polylith/sync/update.py
index 92524b30..a6e5c375 100644
--- a/components/polylith/sync/update.py
+++ b/components/polylith/sync/update.py
@@ -3,7 +3,7 @@
 from typing import List, Union
 
 import tomlkit
-from polylith import project, repo, workspace
+from polylith import configuration, project, repo
 from tomlkit.toml_document import TOMLDocument
 
 
@@ -101,7 +101,7 @@ def generate_updated_project(
 
 
 def to_packages(root: Path, namespace: str, diff: dict) -> List[dict]:
-    theme = workspace.parser.get_theme_from_config(root)
+    theme = configuration.get_theme_from_config(root)
 
     is_project = diff["is_project"]
 
diff --git a/components/polylith/test/tests.py b/components/polylith/test/tests.py
index 475fa46a..ca71b418 100644
--- a/components/polylith/test/tests.py
+++ b/components/polylith/test/tests.py
@@ -2,7 +2,7 @@
 
 from polylith.dirs import create_dir
 from polylith.files import create_file
-from polylith.workspace import parser
+from polylith import configuration
 
 template = """\
 from {namespace}.{package} import {modulename}
@@ -14,7 +14,7 @@ def test_sample():
 
 
 def create_test(root: Path, options: dict) -> None:
-    if not parser.is_test_generation_enabled(root):
+    if not configuration.is_test_generation_enabled(root):
         return
 
     brick = options["brick"]
@@ -22,7 +22,7 @@ def create_test(root: Path, options: dict) -> None:
     package = options["package"]
     modulename = options["modulename"]
 
-    dirs_structure = parser.get_tests_structure_from_config(root)
+    dirs_structure = configuration.get_tests_structure_from_config(root)
     dirs = dirs_structure.format(brick=brick, namespace=namespace, package=package)
     d = create_dir(root, dirs)
 
diff --git a/components/polylith/workspace/__init__.py b/components/polylith/workspace/__init__.py
index 19aea7eb..f903ad53 100644
--- a/components/polylith/workspace/__init__.py
+++ b/components/polylith/workspace/__init__.py
@@ -1,3 +1,3 @@
-from polylith.workspace import create, parser, paths
+from polylith.workspace import create, paths
 
-__all__ = ["create", "parser", "paths"]
+__all__ = ["create", "paths"]
diff --git a/components/polylith/workspace/paths.py b/components/polylith/workspace/paths.py
index d910748a..a33f62a0 100644
--- a/components/polylith/workspace/paths.py
+++ b/components/polylith/workspace/paths.py
@@ -1,8 +1,7 @@
 from pathlib import Path
 from typing import Set
 
-from polylith import repo
-from polylith.workspace import parser
+from polylith import configuration, repo
 
 
 def get_path(structure: str, brick: str, ns: str, package: str) -> str:
@@ -14,7 +13,7 @@ def get_paths(structure: str, brick: str, ns: str, packages: Set[str]) -> Set[st
 
 
 def collect_paths(root: Path, ns: str, brick: str, packages: Set[str]) -> Set[Path]:
-    structure = parser.get_brick_structure_from_config(root)
+    structure = configuration.get_brick_structure_from_config(root)
 
     paths = get_paths(structure, brick, ns, packages)
 
diff --git a/development/david.py b/development/david.py
index a0821834..fb625d2d 100644
--- a/development/david.py
+++ b/development/david.py
@@ -1,19 +1,31 @@
 from pathlib import Path
 
 from polylith import (
+    alias,
     bricks,
+    check,
+    commands,
+    configuration,
     development,
     diff,
     dirs,
+    distributions,
     files,
+    hatch,
+    imports,
     info,
     interface,
+    libs,
+    parsing,
+    pdm,
     poetry,
-    poetry_plugin,
     project,
     readme,
     repo,
+    reporting,
+    sync,
     test,
+    toml,
     workspace,
 )
 
@@ -23,7 +35,7 @@
 print(repo.projects_dir)
 
 root = Path.cwd()
-ns = workspace.parser.get_namespace_from_config(root)
+ns = configuration.get_namespace_from_config(root)
 
 tag = diff.collect.get_latest_tag(root, "release") or ""
 
diff --git a/projects/pdm_polylith_bricks/pyproject.toml b/projects/pdm_polylith_bricks/pyproject.toml
index f899c0b0..6c81758b 100644
--- a/projects/pdm_polylith_bricks/pyproject.toml
+++ b/projects/pdm_polylith_bricks/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pdm-polylith-bricks"
-version = "0.1.1"
+version = "0.1.2"
 description = "a PDM build hook for Polylith"
 authors = ["David Vujic"]
 homepage = "https://davidvujic.github.io/python-polylith-docs/"
@@ -10,6 +10,7 @@ readme = "README.md"
 
 packages = [
     {include = "polylith/pdm_project_hooks", from = "../../bases"},
+    {include = "polylith/configuration",from = "../../components"},
     {include = "polylith/parsing",from = "../../components"},
     {include = "polylith/pdm",from = "../../components"},
     {include = "polylith/repo",from = "../../components"},
diff --git a/projects/pdm_polylith_workspace/poetry.lock b/projects/pdm_polylith_workspace/poetry.lock
index 52548aa4..d89d0459 100644
--- a/projects/pdm_polylith_workspace/poetry.lock
+++ b/projects/pdm_polylith_workspace/poetry.lock
@@ -1,7 +1,17 @@
 # This file is automatically @generated by Poetry 1.7.1 and should not be changed by hand.
-package = []
+
+[[package]]
+name = "tomlkit"
+version = "0.11.8"
+description = "Style preserving TOML library"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "tomlkit-0.11.8-py3-none-any.whl", hash = "sha256:8c726c4c202bdb148667835f68d68780b9a003a9ec34167b6c673b38eff2a171"},
+    {file = "tomlkit-0.11.8.tar.gz", hash = "sha256:9330fc7faa1db67b541b28e62018c17d20be733177d290a13b24c62d1614e0c3"},
+]
 
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "c595a0588c25d58f3e3834ad7169126836d262b925fe6ca9b5d540dcf301d254"
+content-hash = "0d1c25c8e15e0ca2a5cc97fce19b1c931a1fc9aad76a3a3df58d02504fee156f"
diff --git a/projects/pdm_polylith_workspace/pyproject.toml b/projects/pdm_polylith_workspace/pyproject.toml
index 53c0d783..024670b1 100644
--- a/projects/pdm_polylith_workspace/pyproject.toml
+++ b/projects/pdm_polylith_workspace/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pdm-polylith-workspace"
-version = "0.1.0"
+version = "0.1.1"
 description = "a PDM build hook for a Polylith workspace"
 homepage = "https://davidvujic.github.io/python-polylith-docs/"
 repository = "https://github.com/davidvujic/python-polylith"
@@ -8,10 +8,18 @@ authors = ["David Vujic"]
 license = "MIT"
 readme = "README.md"
 
-packages = [{include = "polylith/pdm_workspace_hooks", from = "../../bases"}]
+packages = [
+    {include = "polylith/pdm_workspace_hooks", from = "../../bases"},
+    {include = "polylith/configuration",from = "../../components"},
+    {include = "polylith/parsing",from = "../../components"},
+    {include = "polylith/pdm",from = "../../components"},
+    {include = "polylith/repo",from = "../../components"},
+    {include = "polylith/toml",from = "../../components"},
+]
 
 [tool.poetry.dependencies]
 python = "^3.9"
+tomlkit = "^0.11.5"
 
 [tool.poetry.plugins."pdm.build.hook"]
 polylith-workspace = "pdm_polylith_workspace.polylith.pdm_workspace_hooks.core"
diff --git a/projects/poetry_polylith_plugin/pyproject.toml b/projects/poetry_polylith_plugin/pyproject.toml
index 84f8aab9..c9715e55 100644
--- a/projects/poetry_polylith_plugin/pyproject.toml
+++ b/projects/poetry_polylith_plugin/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "poetry-polylith-plugin"
-version = "1.15.0"
+version = "1.15.1"
 description = "A Poetry plugin that adds tooling support for the Polylith Architecture"
 authors = ["David Vujic"]
 homepage = "https://davidvujic.github.io/python-polylith-docs/"
@@ -14,6 +14,7 @@ packages = [
     {include = "polylith/bricks",from = "../../components"},
     {include = "polylith/check",from = "../../components"},
     {include = "polylith/commands",from = "../../components"},
+    {include = "polylith/configuration",from = "../../components"},
     {include = "polylith/development",from = "../../components"},
     {include = "polylith/diff",from = "../../components"},
     {include = "polylith/dirs",from = "../../components"},
diff --git a/projects/polylith_cli/pyproject.toml b/projects/polylith_cli/pyproject.toml
index 9f3fadaf..424c0884 100644
--- a/projects/polylith_cli/pyproject.toml
+++ b/projects/polylith_cli/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "polylith-cli"
-version = "1.2.0"
+version = "1.2.1"
 description = "Python tooling support for the Polylith Architecture"
 authors = ['David Vujic']
 homepage = "https://davidvujic.github.io/python-polylith-docs/"
@@ -14,6 +14,7 @@ packages = [
     {include = "polylith/bricks",from = "../../components"},
     {include = "polylith/check",from = "../../components"},
     {include = "polylith/commands",from = "../../components"},
+    {include = "polylith/configuration",from = "../../components"},
     {include = "polylith/development",from = "../../components"},
     {include = "polylith/diff",from = "../../components"},
     {include = "polylith/dirs",from = "../../components"},
diff --git a/pyproject.toml b/pyproject.toml
index 5b420396..0dbe6c73 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,6 +15,7 @@ packages = [
     {include = "polylith/alias",from = "components"},
     {include = "polylith/bricks",from = "components"},
     {include = "polylith/check",from = "components"},
+    {include = "polylith/configuration",from = "components"},
     {include = "polylith/commands",from = "components"},
     {include = "polylith/development",from = "components"},
     {include = "polylith/diff",from = "components"},
diff --git a/test/components/polylith/configuration/__init__.py b/test/components/polylith/configuration/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/test/components/polylith/configuration/test_core.py b/test/components/polylith/configuration/test_core.py
new file mode 100644
index 00000000..3b2643fe
--- /dev/null
+++ b/test/components/polylith/configuration/test_core.py
@@ -0,0 +1,103 @@
+from pathlib import Path
+from typing import Tuple
+
+import pytest
+import tomlkit
+from polylith.configuration import core
+
+config_template = """
+[tool.polylith]
+namespace = "my_namespace"
+
+[tool.polylith.structure]
+theme = "{theme}"
+
+[tool.polylith.tag.patterns]
+stable = "stable-*"
+release = "v[0-9]*"
+
+[tool.polylith.test]
+enabled = true
+"""
+
+
+@pytest.fixture
+def use_fake(monkeypatch):
+    def patch(theme: str):
+        config = config_template.format(theme=theme)
+        name = "_load_workspace_config"
+
+        monkeypatch.setattr(core, name, lambda *args: tomlkit.loads(config))
+
+    return patch
+
+
+@pytest.fixture
+def use_loose(use_fake):
+    use_fake(theme="loose")
+
+
+@pytest.fixture
+def use_tdd(use_fake):
+    use_fake(theme="tdd")
+
+
+fake_path = Path.cwd()
+
+
+def test_get_namespace(use_loose):
+    res = core.get_namespace_from_config(fake_path)
+
+    assert res == "my_namespace"
+
+
+def test_get_tag_pattern(use_loose):
+    stable = core.get_tag_pattern_from_config(fake_path, "stable")
+    release = core.get_tag_pattern_from_config(fake_path, "release")
+
+    assert stable == "stable-*"
+    assert release == "v[0-9]*"
+
+
+def test_is_test_generation_enabled(use_loose):
+    res = core.is_test_generation_enabled(fake_path)
+
+    assert res is True
+
+
+def test_is_readme_generation_enabled(use_loose):
+    res = core.is_readme_generation_enabled(fake_path)
+
+    assert res is False
+
+
+def test_get_theme(use_loose):
+    res = core.get_theme_from_config(fake_path)
+
+    assert res == "loose"
+
+
+def _get_structure(path: Path) -> Tuple[str, str, str]:
+    brick = core.get_brick_structure_from_config(path)
+    test = core.get_tests_structure_from_config(path)
+    resources = core.get_resources_structure_from_config(path)
+
+    return brick, test, resources
+
+
+def test_get_structure_for_loose_theme(use_loose):
+    brick, test, resources = _get_structure(fake_path)
+
+    expected = "{brick}/{namespace}/{package}"
+
+    assert brick == expected
+    assert test == f"test/{expected}"
+    assert resources == expected
+
+
+def test_get_structure_for_tdd_theme(use_tdd):
+    brick, test, resources = _get_structure(fake_path)
+
+    assert brick == "{brick}/{package}/src/{namespace}/{package}"
+    assert test == "{brick}/{package}/test/{namespace}/{package}"
+    assert resources == "{brick}/{package}"
diff --git a/test/components/polylith/pdm/__init__.py b/test/components/polylith/pdm/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/test/components/polylith/pdm/test_workspace_hook.py b/test/components/polylith/pdm/test_workspace_hook.py
new file mode 100644
index 00000000..4669114a
--- /dev/null
+++ b/test/components/polylith/pdm/test_workspace_hook.py
@@ -0,0 +1,31 @@
+from polylith.pdm.hooks.workspace import parse_paths
+from pathlib import Path
+import tomlkit
+
+
+root = "/some/path"
+namespace = "my_namespace"
+
+toml_with_tdd_theme = f"""\
+[tool.polylith.bricks]
+"bases/one/src/{namespace}/one" = "{namespace}/one"
+"components/two/src/{namespace}/two" = "{namespace}/two"
+
+[build-system]
+requires = ["pdm-backend"]
+build-backend = "pdm.backend"
+"""
+
+
+def test_parse_paths_for_loose_theme():
+    res = parse_paths(Path(root), "loose", namespace, {})
+
+    assert res == {f"{root}/bases", f"{root}/components"}
+
+
+def test_parse_paths_for_tdd_theme():
+    data = tomlkit.loads(toml_with_tdd_theme)
+
+    res = parse_paths(Path(root), "tdd", namespace, data)
+
+    assert res == {f"{root}/bases/one/src", f"{root}/components/two/src"}