Add ruff config (ruff.toml, dev dep) and document in CLAUDE.md

Author: Kani999

CLAUDE.md

@@ -4,6 +4,24 @@
 
 - **Never** add `Co-Authored-By: Claude` (or any Claude/Anthropic credit) to commit messages.
 
+## Linting & Formatting
+
+[ruff](https://docs.astral.sh/ruff/) is the project linter and formatter.
+Configuration lives in `ruff.toml` (line-length = 120, ruleset E/F/W/I).
+
+```bash
+# Install dev dependencies (includes ruff)
+pip install -e ".[dev]"
+
+# Check
+ruff check netbox_custom_objects_tab/
+
+# Format
+ruff format netbox_custom_objects_tab/
+```
+
+Always run both before committing Python changes.
+
 ## Purpose
 
 Adds a **"Custom Objects"** tab to NetBox object detail pages (Device, Site, Rack, etc.),

netbox_custom_objects_tab/views.py

@@ -9,7 +9,6 @@
 from django.shortcuts import get_object_or_404, render
 from django.utils.translation import gettext_lazy as _
 from django.views.generic import View
-
 from extras.choices import CustomFieldTypeChoices
 from netbox.plugins import get_plugin_config
 from netbox.tables import BaseTable

pyproject.toml

@@ -25,7 +25,7 @@ classifiers = [
 dependencies = []
 
 [project.optional-dependencies]
-dev = ["pytest", "pytest-django"]
+dev = ["pytest", "pytest-django", "ruff"]
 
 [project.urls]
 Homepage = "https://github.com/CESNET/netbox-custom-objects-tab"

ruff.toml

@@ -0,0 +1,7 @@
+line-length = 120
+
+[lint]
+select = ["E", "F", "W", "I"]
+
+[lint.isort]
+known-third-party = ["extras", "netbox", "utilities", "netbox_custom_objects"]