Add a reusable workflow to prepare release branches

.github/workflows/prep-release.yaml

@@ -0,0 +1,31 @@
+name: "✨ Prep release"
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: "The new version"
+        type: "string"
+        required: true
+
+jobs:
+  prep-release:
+    name: "Prep release v${{ inputs.version }}"
+
+    permissions:
+      contents: "write"
+      pull-requests: "write"
+
+    strategy:
+      matrix:
+        include:
+          - tox-label-create-changes: "prep-release"
+            branch-name: "release/$VERSION"
+            commit-title: "Update project metadata"
+            pr-base: "releases"
+            pr-title: "Release v$VERSION"
+
+    uses: "kurtmckee/github-workflows/.github/workflows/create-pr.yaml@ca26472ada33aa277527450aa46436f530e3d2c1" # v1.4
+    with:
+      config: "${{ toJSON(matrix) }}"
+      version: "${{ inputs.version }}"

changelog.d/20250409_083939_kurtmckee_add_prep_release_workflow.rst

@@ -0,0 +1,4 @@
+Development
+-----------
+
+*   Add a reusable workflow to prepare release branches.

tox.ini

@@ -6,6 +6,7 @@ envlist =
     pypy{3.11, 3.10}{-http,}
     py3.9-minimum_dependencies
     coverage_report
+    build
     mypy
     docs
 labels =
@@ -44,6 +45,18 @@ deps = -rrequirements/docs/requirements.txt
 commands = sphinx-build -aWEnqb html docs/ build/docs
 
 
+[testenv:build]
+base_python = py3.13
+skip_install = true
+deps =
+    build
+    twine
+    uv
+commands =
+    python -m build --installer uv --outdir dist/
+    twine check --strict dist/*
+
+
 [testenv:coverage_erase]
 skipsdist = true
 skip_install = true