diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..d940b49
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,35 @@
+name: CI
+
+on:
+    push:
+    pull_request:
+
+jobs:
+    checks:
+        runs-on: ubuntu-latest
+
+        steps:
+            - uses: actions/checkout@v4
+
+            - uses: actions/setup-python@v6
+              with:
+                  python-version: "3.13"
+                  cache: "pip"
+
+            - name: Install package and dev tools
+              run: |
+                  python -m pip install --upgrade pip
+                  pip install -e .
+                  pip install pytest ruff mypy
+
+            - name: Lint
+              run: ruff check .
+
+            - name: Format check
+              run: ruff format --check .
+
+            - name: Type check
+              run: mypy src
+
+            - name: Test
+              run: pytest
diff --git a/.gitignore b/.gitignore
index 52bcebd..8d9f191 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,9 @@
 .venv/
+.venv-test
 __pycache__/
 *.pyc
 .DS_Store
 *.egg-info/
-data
\ No newline at end of file
+data
+dist/
+build/
\ No newline at end of file
diff --git a/Makefile b/Makefile
index 2ad763c..526d46f 100644
--- a/Makefile
+++ b/Makefile
@@ -13,4 +13,4 @@ typecheck:
 test:
 	pytest
 
-check: lint test typecheck
\ No newline at end of file
+check: lint test format typecheck
\ No newline at end of file
diff --git a/README.md b/README.md
index 03cb5d2..4d1f3c2 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,13 @@
+[![CI](https://github.com/aga87/python-photo-tools/actions/workflows/ci.yml/badge.svg)](https://github.com/aga87/python-photo-tools/actions)
+
 # Python Photo Tools
 
 A command-line tool for organising and processing photos using Python.
 
-## Branches
+## Supported formats
 
-- `main` – Stable branch. Contains production-ready code and reflects the latest completed features.
-- `dev` – Integration branch. Used to combine and test feature branches before merging into `main`.
+- RAW: .raf
+- JPG: .jpg, .jpeg
 
 ## Prerequisites - System Tools
 
@@ -34,6 +36,22 @@ If running in a Docker container, include:
 RUN apt-get update && apt-get install -y exiftool
 ```
 
+## Installation
+
+### Using pipx (recommended)
+
+```shell
+pipx install git+https://github.com/aga87/python-photo-tools.git
+```
+
+### Local development
+
+Clone the repository and install:
+
+```shell
+pip install .
+```
+
 ## Usage
 
 List available commands:
@@ -114,7 +132,7 @@ photo-tools optimise <INPUT_DIR>
 photo-tools optimise <INPUT_DIR> --dry-run
 ```
 
-## Local Testing Setup
+## Local Development Setup
 
 ### Data 
 
@@ -157,4 +175,4 @@ Other commands follow the same structure but are not yet covered.
 
 ### Makefile
 
-Common development tasks are available via the Makefile.
\ No newline at end of file
+Common development tasks are available via the Makefile.
diff --git a/pyproject.toml b/pyproject.toml
index 13a1d96..850503f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ requires-python = ">=3.13"
 dependencies = ["typer>=0.24,<1.0", "pillow>=12.1,<13.0"]
 
 [dependency-groups]
-dev = ["pytest>=9,<10", "ruff>=0.15,<1.0", "mypy>=1.19,<2.0"]
+dev = ["pytest>=9,<10", "ruff>=0.15,<1.0", "mypy>=1.19,<2.0", "build>=1.4,<2.0"]
 
 [project.scripts]
 photo-tools = "photo_tools.cli:app"
diff --git a/src/photo_tools/cli.py b/src/photo_tools/cli.py
index c0fde24..c94f4c5 100644
--- a/src/photo_tools/cli.py
+++ b/src/photo_tools/cli.py
@@ -8,9 +8,7 @@
 from photo_tools.organise_by_type import organise_by_type
 from photo_tools.soft_delete_unpaired_raws import soft_delete_unpaired_raws
 
-app = typer.Typer(
-    help="CLI tools for organising and optimising photography workflows."
-)
+app = typer.Typer(help="CLI tools for organising and optimising photography workflows.")
 
 
 @app.callback()
@@ -91,7 +89,7 @@ def soft_delete_unpaired_raws_cmd(
 
 @app.command(
     "optimise",
-    help="Resize JPG images to max 2500px width and compress to ≤500KB using quality " \
+    help="Resize JPG images to max 2500px width and compress to ≤500KB using quality "
     "70-100, saving as prefixed copies.",
 )
 def optimise_cmd(