From a9804adf76fc7af66468a5d939e38c7cf5cbe371 Mon Sep 17 00:00:00 2001
From: Henry Schreiner <henryfs@princeton.edu>
Date: Wed, 7 Oct 2026 12:58:57 -0400
Subject: [PATCH] chore: require Python 3.11+

Python 3.10 reached end of life.

Assisted-by: ClaudeCode:claude-opus-5-5
---
 .github/workflows/conda.yml | 2 +-
 .github/workflows/pip.yml   | 2 +-
 README.md                   | 2 +-
 pyproject.toml              | 4 +---
 4 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/conda.yml b/.github/workflows/conda.yml
index 54dc720..4f86305 100644
--- a/.github/workflows/conda.yml
+++ b/.github/workflows/conda.yml
@@ -13,7 +13,7 @@ jobs:
       fail-fast: false
       matrix:
         platform: [ubuntu-latest]
-        python-version: ["3.10", "3.13"]
+        python-version: ["3.11", "3.13"]
 
     runs-on: ${{ matrix.platform }}
 
diff --git a/.github/workflows/pip.yml b/.github/workflows/pip.yml
index 81e7b28..18dc44f 100644
--- a/.github/workflows/pip.yml
+++ b/.github/workflows/pip.yml
@@ -15,7 +15,7 @@ jobs:
       fail-fast: false
       matrix:
         platform: [windows-latest, macos-latest, ubuntu-latest]
-        python-version: ["3.9", "3.14", "pypy-3.10"]
+        python-version: ["3.11", "3.14", "pypy-3.11"]
 
     steps:
     - uses: actions/checkout@v7
diff --git a/README.md b/README.md
index 5d89f44..3b1b1db 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@
 
 
 An example project built with [pybind11][] and [scikit-build-core][]. Python
-3.9+ (see older commits for 3.7+, or even older versions of Python using [scikit-build (classic)][]).
+3.11+ (see older commits for 3.7+, or even older versions of Python using [scikit-build (classic)][]).
 
 
 [gitter-badge]:            https://badges.gitter.im/pybind/Lobby.svg
diff --git a/pyproject.toml b/pyproject.toml
index b0452c7..f291c37 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,12 +13,10 @@ readme = "README.md"
 authors = [
   { name = "My Name", email = "me@email.com" },
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.11"
 classifiers = [
   "Development Status :: 4 - Beta",
   "Programming Language :: Python :: 3 :: Only",
-  "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",