diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index fc324c4b..98b48521 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -1,7 +1,7 @@
 version: 2
 updates:
   - package-ecosystem: "pip"
-    directory: "/"
+    directory: "/dev"
     schedule:
       interval: "daily"
     assignees:
diff --git a/.github/workflows/continuous_integration.yml b/.github/workflows/continuous_integration.yml
index fcb90c81..6c91ed07 100644
--- a/.github/workflows/continuous_integration.yml
+++ b/.github/workflows/continuous_integration.yml
@@ -11,8 +11,11 @@ env:
 
 jobs:
   validate-models:
-    name: Validate models.yml
+    name: CI
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: dev/
 
     steps:
     - uses: actions/checkout@v4
@@ -23,7 +26,28 @@ jobs:
         python-version: ${{ env.PYTHON_VERSION }}
 
     - name: Install requirements
-      run: pip install -r models_validator/requirements.txt
+      run: pip install -r requirements.txt
+
+    - name: Check black
+      if: always()
+      run: make check-black
+
+    - name: Check isort
+      if: always()
+      run: make check-isort
+
+    - name: Check flake8
+      if: always()
+      run: make flake8
+
+    - name: Check mypy
+      if: always()
+      run: make mypy
+
+    - name: Check pyupgrade
+      if: always()
+      run: make pyupgrade
 
     - name: Validate models.yml
-      run: python models_validator/validate.py models.yml
+      if: always()
+      run: make validate-models
diff --git a/dev/Dockerfile b/dev/Dockerfile
new file mode 100644
index 00000000..20f1b85d
--- /dev/null
+++ b/dev/Dockerfile
@@ -0,0 +1,11 @@
+FROM python:3.10.13-slim-bookworm
+
+RUN apt-get update && apt-get install --yes make bash-completion
+
+WORKDIR /app/dev/
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+STOPSIGNAL SIGKILL
+CMD sleep infinity
diff --git a/dev/Makefile b/dev/Makefile
new file mode 100644
index 00000000..67e35a73
--- /dev/null
+++ b/dev/Makefile
@@ -0,0 +1,42 @@
+# Commands inside the container
+
+all: pyupgrade black autoflake isort flake8 mypy
+
+pyupgrade:
+	pyupgrade --py310-plus --exit-zero-even-if-changed $$(find . -name '*.py')
+
+check-pyupgrade:
+	pyupgrade --py310-plus $$(find . -name '*.py')
+
+black:
+	black src/
+
+check-black:
+	black --check --diff src/
+
+autoflake:
+	autoflake src/
+
+isort:
+	isort src/
+
+check-isort:
+	isort --check-only --diff src/
+
+flake8:
+	flake8 src/
+
+mypy:
+	mypy src/
+
+validate-models:
+	python src/validate.py
+
+# Docker manage commands
+
+run-dev:
+	USER_ID=$$(id -u $${USER}) GROUP_ID=$$(id -g $${USER}) docker-compose up -d --build
+	docker-compose exec models bash --rcfile /etc/bash_completion
+
+stop-dev:
+	docker-compose down
diff --git a/dev/docker-compose.yml b/dev/docker-compose.yml
new file mode 100644
index 00000000..dc885f8f
--- /dev/null
+++ b/dev/docker-compose.yml
@@ -0,0 +1,21 @@
+version: "3"
+services:
+    models:
+        build: .
+        user: $USER_ID:$GROUP_ID
+        volumes:
+            - ..:/app
+        depends_on:
+            - postgres
+        networks:
+            - postgres
+    postgres:
+        image: postgres:15
+        environment:
+            - POSTGRES_USER=openslides
+            - POSTGRES_PASSWORD=openslides
+            - POSTGRES_DB=openslides
+        networks:
+            - postgres
+networks:
+    postgres:
diff --git a/dev/requirements.txt b/dev/requirements.txt
new file mode 100644
index 00000000..5dd8ac34
--- /dev/null
+++ b/dev/requirements.txt
@@ -0,0 +1,13 @@
+autoflake==2.2.1
+black==24.1.1
+flake8==7.0.0
+isort==5.13.2
+mypy==1.8.0
+pytest==8.0.0
+pyupgrade==3.15.0
+pyyaml==6.0.1
+simplejson==3.19.2
+
+# typing
+types-PyYAML==6.0.12.12
+types-simplejson==3.19.0.2
diff --git a/dev/setup.cfg b/dev/setup.cfg
new file mode 100644
index 00000000..6575421d
--- /dev/null
+++ b/dev/setup.cfg
@@ -0,0 +1,19 @@
+[autoflake]
+verbose = true
+in-place = true
+remove-all-unused-imports = true
+ignore-init-module-imports = true
+recursive = true
+
+[isort]
+include_trailing_comma = true
+multi_line_output = 3
+force_grid_wrap = 0
+use_parentheses = True
+line_length = 88
+
+[flake8]
+extend-ignore = E203,E501
+
+[mypy]
+disallow_untyped_defs = true
diff --git a/models_validator/validate.py b/dev/src/validate.py
similarity index 99%
rename from models_validator/validate.py
rename to dev/src/validate.py
index 25858f67..ea3a42ab 100644
--- a/models_validator/validate.py
+++ b/dev/src/validate.py
@@ -1,5 +1,6 @@
 import re
 import sys
+from pathlib import Path
 from typing import Any, cast
 
 import simplejson as json
@@ -17,9 +18,7 @@
 DECIMAL_REGEX = re.compile(r"^-?(\d|[1-9]\d+)\.\d{6}$")
 COLOR_REGEX = re.compile(r"^#[0-9a-f]{6}$")
 
-DEFAULT_FILES = [
-    "../models.yml",
-]
+DEFAULT_FILES = [str((Path(__file__).parent / ".." / ".." / "models.yml").resolve())]
 
 RELATION_TYPES = (
     "relation",
diff --git a/models_validator/requirements.txt b/models_validator/requirements.txt
deleted file mode 100644
index 128069d0..00000000
--- a/models_validator/requirements.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-pyyaml==6.0.1
-simplejson==3.19.2
-types-PyYAML==6.0.12.12