From fa36cb9a46518b4b163ebf723ed4fae7610aea8d Mon Sep 17 00:00:00 2001
From: Priya Sundaram <oc-409d01@agentmail.to>
Date: Fri, 28 Aug 2026 11:28:06 +0000
Subject: [PATCH] ci: single-source Python version via pyproject.toml + add
 uv-lock pre-commit hook

- Add astral-sh/uv-pre-commit (uv-lock) so uv.lock stays in sync with
  pyproject.toml automatically instead of relying on manual relocks.
- Replace 'python-version: 3.14' with 'python-version-file: pyproject.toml'
  in every workflow that uses actions/setup-python (build, project_euler,
  sphinx, directory_writer), making requires-python the single source of
  truth for the interpreter version.
---
 .github/workflows/build.yml            | 2 +-
 .github/workflows/directory_writer.yml | 2 +-
 .github/workflows/project_euler.yml    | 4 ++--
 .github/workflows/sphinx.yml           | 2 +-
 .pre-commit-config.yaml                | 5 +++++
 5 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 594369c6dc7b..4ed88a88f2bb 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -17,7 +17,7 @@ jobs:
           cache-dependency-glob: uv.lock
       - uses: actions/setup-python@v7
         with:
-          python-version: 3.14
+          python-version-file: pyproject.toml
           allow-prereleases: true
       - run: uv sync --group=test
       - name: Run tests
diff --git a/.github/workflows/directory_writer.yml b/.github/workflows/directory_writer.yml
index 8b34f97995a7..9df64222cd56 100644
--- a/.github/workflows/directory_writer.yml
+++ b/.github/workflows/directory_writer.yml
@@ -11,7 +11,7 @@ jobs:
           fetch-depth: 0
       - uses: actions/setup-python@v7
         with:
-          python-version: 3.14
+          python-version-file: pyproject.toml
           allow-prereleases: true
       - name: Write DIRECTORY.md
         run: |
diff --git a/.github/workflows/project_euler.yml b/.github/workflows/project_euler.yml
index 73afb2e71cab..06f865f0bcdf 100644
--- a/.github/workflows/project_euler.yml
+++ b/.github/workflows/project_euler.yml
@@ -25,7 +25,7 @@ jobs:
       - uses: astral-sh/setup-uv@v7
       - uses: actions/setup-python@v7
         with:
-          python-version: 3.14
+          python-version-file: pyproject.toml
           allow-prereleases: true
       - run: uv sync --group=euler-validate --group=test
       - run: uv run pytest --doctest-modules --cov-report=term-missing:skip-covered --cov=project_euler/ project_euler/
@@ -43,7 +43,7 @@ jobs:
       - uses: astral-sh/setup-uv@v7
       - uses: actions/setup-python@v7
         with:
-          python-version: 3.14
+          python-version-file: pyproject.toml
           allow-prereleases: true
       - run: uv sync --group=euler-validate --group=test
       - run: uv run pytest scripts/validate_solutions.py
diff --git a/.github/workflows/sphinx.yml b/.github/workflows/sphinx.yml
index 45a74099ff00..3828bea0eaf0 100644
--- a/.github/workflows/sphinx.yml
+++ b/.github/workflows/sphinx.yml
@@ -36,7 +36,7 @@ jobs:
       - uses: astral-sh/setup-uv@v7
       - uses: actions/setup-python@v7
         with:
-          python-version: 3.14
+          python-version-file: pyproject.toml
           allow-prereleases: true
       - run: uv sync --group=docs
       - uses: actions/configure-pages@v6
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 0a5f50751ce3..f884a38bf4cd 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -18,6 +18,11 @@ repos:
     hooks:
       - id: auto-walrus
 
+  - repo: https://github.com/astral-sh/uv-pre-commit
+    rev: 0.12.7
+    hooks:
+      - id: uv-lock
+
   - repo: https://github.com/astral-sh/ruff-pre-commit
     rev: v0.16.1
     hooks: