diff --git a/.github/dependabot.yml b/.github/dependabot.yaml
similarity index 100%
rename from .github/dependabot.yml
rename to .github/dependabot.yaml
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
deleted file mode 100644
index 1a1480a..0000000
--- a/.github/workflows/ci.yml
+++ /dev/null
@@ -1,22 +0,0 @@
-on:  # yamllint disable-line rule:truthy
-  pull_request:
-    branches: ["main"]
-
-permissions:
-  contents: read
-
-jobs:
-  yamllint:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: karancode/yamllint-github-action@v2.1.1
-  ruff:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - name: Set up Python 3.11
-        uses: actions/setup-python@v5
-        with:
-          python-version: "3.11"
-      - uses: chartboost/ruff-action@v1
diff --git a/.github/workflows/lint.yaml b/.github/workflows/lint.yaml
new file mode 100644
index 0000000..3b8b976
--- /dev/null
+++ b/.github/workflows/lint.yaml
@@ -0,0 +1,46 @@
+name: Lint
+on:  # yamllint disable-line rule:truthy
+  pull_request:
+    branches: ["main"]
+
+permissions:
+  checks: write
+  contents: read
+  issues: write
+  pull-requests: write
+
+jobs:
+  just:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: extractions/setup-just@v1
+        with:
+          just-version: "1.24.0"
+      - name: Format justfile
+        run: just --fmt --unstable
+      - uses: reviewdog/action-suggester@v1
+        with:
+          tool_name: just
+  ruff:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python 3.11
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+      - uses: chartboost/ruff-action@v1
+        with:
+          args: format
+      - uses: chartboost/ruff-action@v1
+        with:
+          args: check --fix
+      - uses: reviewdog/action-suggester@v1
+        with:
+          tool_name: ruff
+  yamllint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: karancode/yamllint-github-action@v2.1.1
diff --git a/.gitignore b/.gitignore
index ba75c9d..8b9b0e6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 __pycache__/
 .ruff_cache/
+.pytest_cache/
 venv/
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index fa2a603..5049b07 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -12,6 +12,18 @@ repos:
       - id: pretty-format-json
         exclude: ^.vscode/.*\.json$
       - id: trailing-whitespace
+  - repo: local
+    hooks:
+      - id: just
+        entry: just --fmt --unstable
+        files: |
+          (?x)^(
+            .justfile|
+            justfile
+          )$
+        language: system
+        name: just
+        pass_filenames: false
   - repo: https://github.com/jazzband/pip-tools
     rev: 7.4.0
     hooks:
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 3fa2e28..dfde84d 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -19,6 +19,7 @@
         "ifdef",
         "ifndef",
         "inplace",
+        "justfile",
         "microcontroller",
         "microcontrollers",
         "MOSI",
diff --git a/README.adoc b/README.adoc
index aa279e6..12fbdce 100644
--- a/README.adoc
+++ b/README.adoc
@@ -17,7 +17,6 @@ endif::[]
 :pre-commit: https://pre-commit.com/[pre-commit]
 :pipkin: https://github.com/aivarannamaa/pipkin[pipkin]
 
-image:https://github.com/jwillikers/fan-controller/actions/workflows/ci.yml/badge.svg["CI", link="https://github.com/jwillikers/fan-controller/actions/workflows/ci.yml"]
 image:https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit&logoColor=white[pre-commit, link=https://github.com/pre-commit/pre-commit]
 image:https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json[Ruff, link=https://github.com/astral-sh/ruff]