From 46d54fb5465a16ac29e26d937c3adaf9791956cb Mon Sep 17 00:00:00 2001
From: shaia <shaia@outlook.com>
Date: Fri, 5 Dec 2025 14:26:08 +0200
Subject: [PATCH 1/2] chore: drop Python 3.8 support, add Python 3.13

Python 3.8 reached end-of-life in October 2024. Update minimum
version to 3.9 and add 3.13 classifier for latest Python support.
---
 README.md      | 4 ++--
 pyproject.toml | 8 ++++----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/README.md b/README.md
index 437f180..d18612b 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ Python bindings for high-performance CFD simulation library using CPython C-API
 ## Features
 
 - **High Performance**: Direct bindings to optimized C library
-- **Stable ABI**: Compatible across Python 3.8+ versions
+- **Stable ABI**: Compatible across Python 3.9+ versions
 - **Static Linking**: Self-contained wheels with no external dependencies
 - **Dynamic Solver Discovery**: New solvers automatically available
 - **Multiple Output Formats**: VTK and CSV export support
@@ -241,7 +241,7 @@ cfd_python.OUTPUT_CSV_STATISTICS  # Global statistics (CSV)
 
 ## Requirements
 
-- Python 3.8+
+- Python 3.9+
 - [uv](https://docs.astral.sh/uv/) (recommended) or pip
 
 For building from source:
diff --git a/pyproject.toml b/pyproject.toml
index 1961565..13b0e4d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ license = {text = "MIT"}
 authors = [
     {name = "CFD Team"},
 ]
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 keywords = ["cfd", "fluid-dynamics", "simulation", "numerical-methods", "physics"]
 classifiers = [
     "Development Status :: 4 - Beta",
@@ -22,11 +22,11 @@ classifiers = [
     "Intended Audience :: Developers",
     "License :: OSI Approved :: MIT License",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Programming Language :: C",
     "Topic :: Scientific/Engineering",
     "Topic :: Scientific/Engineering :: Physics",
@@ -60,7 +60,7 @@ viz = [
 [tool.scikit-build]
 minimum-version = "0.4"
 build-dir = "build/{wheel_tag}"
-wheel.py-api = "cp38"
+wheel.py-api = "cp39"
 
 [tool.scikit-build.cmake.define]
 CMAKE_BUILD_TYPE = "Release"
@@ -75,7 +75,7 @@ testpaths = ["tests"]
 python_files = ["test_*.py"]
 
 [tool.ruff]
-target-version = "py38"
+target-version = "py39"
 line-length = 100
 exclude = [
     "build",

From f9856174cb762bf0556f0ec8e5014b07c17b3ab3 Mon Sep 17 00:00:00 2001
From: shaia <shaia@outlook.com>
Date: Fri, 5 Dec 2025 14:31:19 +0200
Subject: [PATCH 2/2] chore: update CI to Python 3.9+, add pytest-cov

- Update build workflow to use Python 3.9 (min supported)
- Test matrix now covers Python 3.9 and 3.13 (min and max)
- Add pytest-cov to test dependencies
---
 .github/workflows/build-wheels.yml | 6 +++---
 pyproject.toml                     | 1 +
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/build-wheels.yml b/.github/workflows/build-wheels.yml
index fa338e1..71e18bb 100644
--- a/.github/workflows/build-wheels.yml
+++ b/.github/workflows/build-wheels.yml
@@ -27,10 +27,10 @@ jobs:
           path: cfd
           fetch-depth: 0
 
-      - name: Set up Python 3.8
+      - name: Set up Python 3.9
         uses: actions/setup-python@v5
         with:
-          python-version: "3.8"
+          python-version: "3.9"
 
       - name: Install build dependencies
         run: |
@@ -98,7 +98,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python: ["3.8", "3.12"]
+        python: ["3.9", "3.13"]
 
     steps:
       - name: Set up Python ${{ matrix.python }}
diff --git a/pyproject.toml b/pyproject.toml
index 13b0e4d..ea43724 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,6 +39,7 @@ dependencies = []
 test = [
     "pytest>=7.0",
     "pytest-benchmark",
+    "pytest-cov",
     "numpy",
 ]
 docs = [