diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..1b51213
--- /dev/null
+++ b/.envrc
@@ -0,0 +1,5 @@
+export PYTHONDEVMODE=1
+export VIRTUAL_ENV=.venv
+layout python3
+export DJANGO_SETTINGS_MODULE=dx.settings
+export DJANGO_CONFIGURATION=Local
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..4dd1b78
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,4 @@
+- repo: https://github.com/peterdemin/pip-compile-multi
+  rev: v2.6.2
+  hooks:
+    - id: pip-compile-multi-verify
diff --git a/justfile b/justfile
new file mode 100644
index 0000000..3fe2aed
--- /dev/null
+++ b/justfile
@@ -0,0 +1,24 @@
+default: test
+
+alias tc := test-coverage
+alias l := lint
+alias lf := lint-fix
+alias c := compile-dependencies
+
+test:
+  # pytest options can be found in pyproject.toml
+  # look for [tool.pytest.ini_options]
+  python -m pytest
+
+test-coverage:
+  # here we allow extra arguments to be passed to pytest
+  python -m pytest --cov=src --cov-config=pyproject.toml
+
+lint:
+  ruff check .
+
+lint-fix:
+  ruff check --fix .
+
+compile-dependencies:
+  pip-compile-multi
diff --git a/pyproject.toml b/pyproject.toml
index e87510d..c17d348 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,3 +13,16 @@ build-backend = "hatchling.build"
 
 [tool.pytest.ini_options]
 pythonpath = ["src"]
+testpaths = ["tests"]
+
+[tool.coverage.run]
+branch = true
+data_file = "coverage/.coverage"
+source = ["src"]
+omit = ["*/migrations/*"]
+
+[tool.coverage.html]
+directory = "coverage/htmlcov"
+
+[tool.coverage.report]
+skip_empty = true
diff --git a/requirements/base.in b/requirements/base.in
index 54d157a..797b722 100644
--- a/requirements/base.in
+++ b/requirements/base.in
@@ -1,2 +1,3 @@
+django-configurations
 django>=5.1,<5.2
 pip-lock
diff --git a/requirements/base.txt b/requirements/base.txt
index 66a8864..3ea6a65 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -1,4 +1,4 @@
-# SHA1:e1677d1f2cf78dc26b96c6f8b02f0a0192f1d402
+# SHA1:78e037786a8e05baa81b92ef0373bd8fc1069bd9
 #
 # This file is autogenerated by pip-compile-multi
 # To update, run:
@@ -8,6 +8,10 @@
 asgiref==3.8.1
     # via django
 django==5.1.3
+    # via
+    #   -r requirements/base.in
+    #   django-configurations
+django-configurations==2.5.1
     # via -r requirements/base.in
 pip-lock==2.12.0
     # via -r requirements/base.in
diff --git a/src/dx/__init__.py b/src/dx/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/dx/settings.py b/src/dx/settings.py
new file mode 100644
index 0000000..2ff9590
--- /dev/null
+++ b/src/dx/settings.py
@@ -0,0 +1,39 @@
+from pathlib import Path
+from configurations import Configuration
+
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+
+class Base(Configuration):
+    DEBUG = False
+    DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"
+    INSTALLED_APPS = [
+        "dx",
+    ]
+    ROOT_URLCONF = "dx.urls"
+    SECRET_KEY = "django-insecure-cbgvn=orgh$&6l-w91pp2=(b#hjwe1z&ijwiafgt(py1lq5i85"
+    TEMPLATES = [
+        {
+            "BACKEND": "django.template.backends.django.DjangoTemplates",
+            "DIRS": [BASE_DIR / "templates"],
+            "APP_DIRS": True,
+        },
+    ]
+    USE_TZ = True
+
+
+class Dev(Base):
+    # Dangerous: disable host header validation
+    ALLOWED_HOSTS = ["*"]
+    DATABASES = {
+        "default": {
+            "ENGINE": "django.db.backends.sqlite3",
+            "NAME": "db.sqlite3",
+        },
+    }
+    DEBUG = True
+    INSTALLED_APPS = Base.INSTALLED_APPS + ["django_extensions"]
+
+
+class Local(Dev):
+    pass
diff --git a/src/dx/urls.py b/src/dx/urls.py
new file mode 100644
index 0000000..637600f
--- /dev/null
+++ b/src/dx/urls.py
@@ -0,0 +1 @@
+urlpatterns = []
diff --git a/src/foo.py b/src/foo.py
new file mode 100644
index 0000000..7dbdb99
--- /dev/null
+++ b/src/foo.py
@@ -0,0 +1,2 @@
+def dummy():
+    return (1, 1, 1)
diff --git a/src/manage.py b/src/manage.py
new file mode 100755
index 0000000..22d839f
--- /dev/null
+++ b/src/manage.py
@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+"""Django's command-line utility for administrative tasks."""
+
+import os
+import sys
+
+
+def main():
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "dx.settings")
+    os.environ.setdefault("DJANGO_CONFIGURATION", "Base")
+
+    from configurations.management import execute_from_command_line
+
+    execute_from_command_line(sys.argv)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/tests/test_something.py b/tests/test_something.py
new file mode 100644
index 0000000..c448d64
--- /dev/null
+++ b/tests/test_something.py
@@ -0,0 +1,8 @@
+def test_always_true():
+    assert True
+
+
+def test_something_in_src():
+    from foo import dummy
+
+    assert dummy() == (1, 1, 1)