Update Dockerfile to Python 3.13 and drop Python 3.9 support

Co-authored-by: johnthagen <[email protected]>

Author: Copilot

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-24.04
     strategy:
       matrix:
-        python-version: [ "3.9", "3.10", "3.11", "3.12", "3.13", "3.14" ]
+        python-version: [ "3.10", "3.11", "3.12", "3.13", "3.14" ]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4

Dockerfile

@@ -8,7 +8,7 @@
 #     subtle errors when using MUSL.
 #   - These Python packages usually only provide binary wheels for GLIBC, so the packages
 #     will need to be recompiled fully within the container images, increasing build times.
-FROM python:3.12-slim-bookworm AS python_builder
+FROM python:3.13-slim-bookworm AS python_builder
 
 # Pin uv to a specific version to make container builds reproducible.
 ENV UV_VERSION=0.8.22
@@ -58,7 +58,7 @@ RUN uv sync --locked --no-default-groups --no-editable
 
 ## Final Image
 # The image used in the final image MUST match exactly to the python_builder image.
-FROM python:3.12-slim-bookworm
+FROM python:3.13-slim-bookworm
 
 ENV PYTHONDONTWRITEBYTECODE=1
 ENV PYTHONBUFFERED=1

noxfile.py

@@ -7,7 +7,7 @@
 
 
 @session(
-    python=["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"],
+    python=["3.10", "3.11", "3.12", "3.13", "3.14"],
     uv_groups=["test"],
 )
 def test(s: Session) -> None:

pyproject.toml

@@ -13,7 +13,6 @@ classifiers = [
     "Operating System :: OS Independent",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
@@ -24,7 +23,7 @@ classifiers = [
     #   https://pypi.org/classifiers/
     "Private :: Do Not Upload",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
     "rich",
     "typer-slim[standard]"