From 41aa7df8c44189a7c60f999aa049aa1ef7ca600d Mon Sep 17 00:00:00 2001
From: Brewster Malevich <bmalevich@rhg.com>
Date: Wed, 13 May 2026 15:24:07 -0700
Subject: [PATCH] Tune ruff config, using xarray's setup to start

---
 CHANGELOG.md         |  1 +
 pyproject.toml       | 31 +++++++++++++++++++++++++++++++
 src/isku/__init__.py | 14 +++++++-------
 tests/smoke_test.py  |  1 +
 4 files changed, 40 insertions(+), 7 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3aca504..1bce701 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Improved README.
 - Improved CONTRIBUTING.
 - Add project URLs to package metadata.
+- Various improvement to internal code formatting and style.
 
 ## [0.1.0] - 2026-05-06
 
diff --git a/pyproject.toml b/pyproject.toml
index 86fa652..b7be47d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,3 +26,34 @@ dev = [
     { include-group = "tests" },
     "prek>=0.3.13",
 ]
+
+[tool.ruff.lint]
+extend-select = [
+  "YTT",  # flake8-2020
+  "B",    # flake8-bugbear
+  "C4",   # flake8-comprehensions
+  "ISC",  # flake8-implicit-str-concat
+  "PIE",  # flake8-pie
+  "TID",  # flake8-tidy-imports (absolute imports)
+  "PYI",  # flake8-pyi
+  "SIM",  # flake8-simplify
+  "FLY",  # flynt
+  "I",    # isort
+  "PERF", # Perflint
+  "W",    # pycodestyle warnings
+  "PGH",  # pygrep-hooks
+  "PLC",  # Pylint Convention
+  "PLE",  # Pylint Errors
+  "PLR",  # Pylint Refactor
+  "PLW",  # Pylint Warnings
+  "UP",   # pyupgrade
+  "FURB", # refurb
+  "RUF",
+]
+
+[tool.ruff.lint.isort]
+known-first-party = ["isku"]
+
+[tool.ruff.lint.flake8-tidy-imports]
+# Disallow all relative imports.
+ban-relative-imports = "all"
diff --git a/src/isku/__init__.py b/src/isku/__init__.py
index 3e023d4..458ff8d 100644
--- a/src/isku/__init__.py
+++ b/src/isku/__init__.py
@@ -1,18 +1,18 @@
+from collections.abc import Callable
 from dataclasses import dataclass
-from typing import Protocol, Callable
+from typing import Protocol
 
 import xarray as xr
 
-
 __all__ = [
+    "ExtractionWorkflow",
+    "GridWeightingRegions",
+    "ProjectionWorkflow",
+    "RegionExtractor",
     "build_extraction_workflow",
-    "extract_regions",
     "build_projection_workflow",
+    "extract_regions",
     "project",
-    "GridWeightingRegions",
-    "ExtractionWorkflow",
-    "RegionExtractor",
-    "ProjectionWorkflow",
 ]
 
 
diff --git a/tests/smoke_test.py b/tests/smoke_test.py
index 0169c65..b0edd0e 100644
--- a/tests/smoke_test.py
+++ b/tests/smoke_test.py
@@ -3,6 +3,7 @@
 """
 
 import xarray as xr
+
 import isku