CI workflow (RUC-NLPIR/Arbor)

The CI workflow from RUC-NLPIR/Arbor, explained and optimized by Latchkey.

CI health: B - good

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Source: RUC-NLPIR/Arbor.github/workflows/ci.ymlLicense Apache-2.0View source

What it does

This is the CI workflow from the RUC-NLPIR/Arbor repository, a real project running GitHub Actions. It is shown here with attribution under its Apache-2.0 license.

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

The workflow

workflow (.yml)

name: CI

on:
  push:
    branches: [main]
  pull_request:

# Cancel superseded runs on the same ref to save CI minutes.
concurrency:
  group: ci-${{ github.ref }}
  cancel-in-progress: true

jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: astral-sh/setup-uv@v5
        with:
          python-version: "3.12"
      - name: Install dev dependencies
        run: uv sync --group dev
      - name: Ruff (lint) - blocking
        run: uv run ruff check src/ tests/
      - name: Mypy (type check) - advisory
        # Non-blocking for now: the codebase is large and largely untyped.
        # The step still surfaces type issues in the logs; tighten over time.
        continue-on-error: true
        run: uv run mypy src/

  test:
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest]
        python-version: ["3.10", "3.11", "3.12", "3.13"]
        # Also run on macOS for the oldest and newest Python - enough to catch
        # platform issues in the real-git worktree tests without paying the 10x
        # macOS-runner cost on every Python version. (Windows is omitted: the
        # worktree helpers build shell commands with POSIX shlex quoting.)
        include:
          - os: macos-latest
            python-version: "3.10"
          - os: macos-latest
            python-version: "3.13"
    steps:
      - uses: actions/checkout@v4
      - uses: astral-sh/setup-uv@v5
        with:
          python-version: ${{ matrix.python-version }}
      - name: Install dev dependencies
        # Include the optional `mcp` extra so the `arbor mcp` server, the
        # session-backed WebUI, and the plugin-manifest tests are exercised.
        run: uv sync --group dev --extra mcp
      - name: Pytest
        run: uv run pytest

The same workflow, on Latchkey

Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.

name: CI
 
on:
  push:
    branches: [main]
  pull_request:
 
# Cancel superseded runs on the same ref to save CI minutes.
concurrency:
  group: ci-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  lint:
    timeout-minutes: 30
    runs-on: latchkey-small
    steps:
      - uses: actions/checkout@v4
      - uses: astral-sh/setup-uv@v5
        with:
          python-version: "3.12"
      - name: Install dev dependencies
        run: uv sync --group dev
      - name: Ruff (lint) - blocking
        run: uv run ruff check src/ tests/
      - name: Mypy (type check) - advisory
        # Non-blocking for now: the codebase is large and largely untyped.
        # The step still surfaces type issues in the logs; tighten over time.
        continue-on-error: true
        run: uv run mypy src/
 
  test:
    timeout-minutes: 30
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest]
        python-version: ["3.10", "3.11", "3.12", "3.13"]
        # Also run on macOS for the oldest and newest Python - enough to catch
        # platform issues in the real-git worktree tests without paying the 10x
        # macOS-runner cost on every Python version. (Windows is omitted: the
        # worktree helpers build shell commands with POSIX shlex quoting.)
        include:
          - os: macos-latest
            python-version: "3.10"
          - os: macos-latest
            python-version: "3.13"
    steps:
      - uses: actions/checkout@v4
      - uses: astral-sh/setup-uv@v5
        with:
          python-version: ${{ matrix.python-version }}
      - name: Install dev dependencies
        # Include the optional `mcp` extra so the `arbor mcp` server, the
        # session-backed WebUI, and the plugin-manifest tests are exercised.
        run: uv sync --group dev --extra mcp
      - name: Pytest
        run: uv run pytest

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.
Add a job timeout so a hung step cannot burn hours of runner time.

1 third-party action is referenced by a movable tag. Pin it to the commit SHA (Latchkey resolves and applies this automatically) so a repointed tag cannot change what runs.

This workflow runs 2 jobs (5 with the matrix expanded) per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.

Actions used in this workflow

actions/checkout astral-sh/setup-uv