The frontend job succeeded after the runner HOME fix, but backend failed at
a different point: actions/checkout is a JavaScript action and needs a Node
runtime inside the job container to run it at all (exec: "node": executable
file not found in $PATH), and hseeberger/scala-sbt has no Node installed.
Same lesson HOP's own CI setup already documented ("JavaScript actions need
Node in the job image") -- mirroring their fix: install git+nodejs via apt
before the checkout step.
Runs on push/PR to codex/staging-baseline plus manual dispatch: sbt test for
the backend, and npm ci/typecheck/build/audit (full + production-only) for
the frontend, matching the checks already documented as the manual Rocky
verification routine. Verified sbt test compiles and passes with no .env
file present (matching what a checkout-only CI job will actually have) via
a git-archive dry run before writing this.
Two separate jobs, each with its own container image, rather than one
shared runner-label image with ad-hoc installs — reuses the exact
hseeberger/scala-sbt image already used all session for local backend
builds, and a plain node:20-bookworm for the frontend, so nothing needs
apt-get bootstrapping of a second language runtime into the same container.
b0txec