Migrate from Ubicloud to runnerhut

What Ubicloud does well

• Aggressive price-performance — the cheapest credible option in the category
• Open source, which materially reduces lock-in risk
• Transparent GitHub Actions cache with no configuration change
• Deep infrastructure engineering blog that earns real technical trust

Where we differ

• CI runners are one product line among Postgres, Kubernetes, compute and GPU
• Only eight use-case pages — thin guidance for stack-specific CI problems
• Price leadership constrains how much headroom there is for support

The migration

jobs:
  build:
-   runs-on: ubicloud-standard-4
+   runs-on: runnerhut-8vcpu-ubuntu-2404
    steps:
      - uses: actions/checkout@v4

And the migration back

We publish this because after BuildJet's shutdown, "what if you disappear" is a fair question. Leaving is the same single line you changed to arrive.

jobs:
  build:
-   runs-on: runnerhut-8vcpu-ubuntu-2404
+   runs-on: ubuntu-latest

Checklist

1. Install the runnerhut GitHub App on the repositories you want to move
2. Change runs-on in one job first and compare timings against the old runner
3. Add runner.arch to cache keys if you are also moving to arm64
4. Roll out to the rest of the repository once the comparison looks right
5. Set a budget cap and concurrency cancellation before going organisation-wide