autoclose schedule workflow (scikit-learn/scikit-learn)

The autoclose schedule workflow from scikit-learn/scikit-learn, explained and optimized by Latchkey.

What it does

This is the autoclose schedule workflow from the scikit-learn/scikit-learn repository, a real project running GitHub Actions. It is shown here with attribution under its BSD-3-Clause license.

Below, Latchkey shows a faster, safer version produced by its optimization engine.

The workflow

name: autoclose schedule
# Autoclose labeled PR after 2 weeks.

permissions:
  contents: read
  pull-requests: write

on:
  schedule:
    - cron: '0 2 * * *' # runs daily at 02:00 UTC
  workflow_dispatch:

env:
  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

jobs:

  autoclose:
    name: autoclose labeled PRs
    runs-on: ubuntu-latest
    if: github.repository == 'scikit-learn/scikit-learn'
    steps:
      - uses: actions/checkout@v7
      - uses: actions/setup-python@v6
        with:
          python-version: '3.13'
      - name: Install PyGithub
        run: pip install -Uq PyGithub

      - name: Checkout repository
        uses: actions/checkout@v7

      - name: Close PRs labeled more than 14 days ago
        run: |
          python build_tools/github/autoclose_prs.py

The same workflow, on Latchkey

Estimated ~20% faster on cache hits, plus fewer wasted runs and a safer supply chain. Added and changed lines are highlighted.

name: autoclose schedule
# Autoclose labeled PR after 2 weeks.
 
permissions:
  contents: read
  pull-requests: write
 
on:
  schedule:
    - cron: '0 2 * * *' # runs daily at 02:00 UTC
  workflow_dispatch:
 
env:
  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
jobs:
 
  autoclose:
    timeout-minutes: 30
    name: autoclose labeled PRs
    runs-on: latchkey-small
    if: github.repository == 'scikit-learn/scikit-learn'
    steps:
      - uses: actions/checkout@v7
      - uses: actions/setup-python@v6
        with:
          cache: 'pip'
          python-version: '3.13'
      - name: Install PyGithub
        run: pip install -Uq PyGithub
 
      - name: Checkout repository
        uses: actions/checkout@v7
 
      - name: Close PRs labeled more than 14 days ago
        run: |
          python build_tools/github/autoclose_prs.py
 

What changed

• Run on Latchkey managed runners with one line (runs-on), which apply the fixes below automatically and self-heal transient failures. This example uses latchkey-small; pick the runner size that fits the job.
• Cache dependency installs on the setup step so they are served from cache.
• Add a job timeout so a hung step cannot burn hours of runner time.

What Latchkey heals here

This workflow has steps that commonly fail on transient issues (network, registries, flaky browsers). On Latchkey managed runners they are detected, retried, and self-healed instead of failing your build:

• Dependency installs

This workflow runs 1 job per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.

Actions used in this workflow