js workflow (braintrustdata/autoevals)

The js workflow from braintrustdata/autoevals, explained and optimized by Latchkey.

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Source: braintrustdata/autoevals.github/workflows/js.yamlLicense MITView source

What it does

This is the js workflow from the braintrustdata/autoevals repository, a real project running GitHub Actions. It is shown here with attribution under its MIT license.

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

The workflow

workflow (.yml)

name: js

on:
  pull_request:
  push:
    branches: [main]

jobs:
  build:
    name: node ${{ matrix.node-version }} / zod ${{ matrix.zod }}
    runs-on: ubuntu-latest

    strategy:
      fail-fast: false
      matrix:
        node-version: [20.x, 22.x, 24.x]
        # zod is a peerDependency ("^3.25.0 || ^4.0.0"); test both majors.
        zod: ["3", "4"]

    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
      - name: Setup pnpm
        uses: pnpm/action-setup@fc06bc1257f339d1d5d8b3a19a8cae5388b55320 # v5.0.0
        with:
          version: 10.33.0
      - name: Use Node.js ${{ matrix.node-version }}
        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
        with:
          node-version: ${{ matrix.node-version }}
          cache: pnpm
      - run: pnpm install --frozen-lockfile
      # The lockfile pins zod 3, so override across the whole tree
      - name: Force zod 4
        if: matrix.zod == '4'
        run: |
          printf '\noverrides:\n  zod: ^4\n' >> pnpm-workspace.yaml
          pnpm install --no-frozen-lockfile
      - name: Verify resolved zod major
        run: node -e "const v=require('zod/package.json').version; console.log('zod', v); if (!v.startsWith('${{ matrix.zod }}.')) { console.error('expected zod ${{ matrix.zod }}.x'); process.exit(1); }"
      - run: pnpm run test
        env:
          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
          OPENAI_BASE_URL: ${{ secrets.OPENAI_BASE_URL }}
          BRAINTRUST_API_KEY: ${{ secrets.BRAINTRUST_API_KEY }}
      - run: pnpm run build

The same workflow, on Latchkey

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

name: js
 
on:
  pull_request:
  push:
    branches: [main]
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build:
    timeout-minutes: 30
    name: node ${{ matrix.node-version }} / zod ${{ matrix.zod }}
    runs-on: latchkey-small
 
    strategy:
      fail-fast: false
      matrix:
        node-version: [20.x, 22.x, 24.x]
        # zod is a peerDependency ("^3.25.0 || ^4.0.0"); test both majors.
        zod: ["3", "4"]
 
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
      - name: Setup pnpm
        uses: pnpm/action-setup@fc06bc1257f339d1d5d8b3a19a8cae5388b55320 # v5.0.0
        with:
          version: 10.33.0
      - name: Use Node.js ${{ matrix.node-version }}
        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
        with:
          node-version: ${{ matrix.node-version }}
          cache: pnpm
      - run: pnpm install --frozen-lockfile
      # The lockfile pins zod 3, so override across the whole tree
      - name: Force zod 4
        if: matrix.zod == '4'
        run: |
          printf '\noverrides:\n  zod: ^4\n' >> pnpm-workspace.yaml
          pnpm install --no-frozen-lockfile
      - name: Verify resolved zod major
        run: node -e "const v=require('zod/package.json').version; console.log('zod', v); if (!v.startsWith('${{ matrix.zod }}.')) { console.error('expected zod ${{ matrix.zod }}.x'); process.exit(1); }"
      - run: pnpm run test
        env:
          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
          OPENAI_BASE_URL: ${{ secrets.OPENAI_BASE_URL }}
          BRAINTRUST_API_KEY: ${{ secrets.BRAINTRUST_API_KEY }}
      - run: pnpm run build

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.
Cancel superseded runs when a branch or PR gets a newer push.
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 (6 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 pnpm/action-setup actions/setup-node