Applied as-is. tools/ci.mjs runs the checks already listed in .github/workflows/ci.yml, in that order, and skips checkout, setup-node and npm ci. Children are spawned with process.execPath, not a shell. test/ci.test.js keeps the step list, smoke script, job env and package.json scripts in step with the workflow.
Tests: node --test test/ci.test.js — 8 pass, 0 fail. npm run ci was not run (it installs and runs the suite).
