The test and test:verbose scripts ran jest with one worker per CPU core, about 47 processes and 7-8 GiB per run on the shared 48-core build host. They now pass --maxWorkers=2. One process took the suite past the 30-second cap in script/test, so two it is; the cap is unchanged. make check, the pre-commit hook and script/cibuild all reach jest through these scripts. The suite timings quoted in the script/test and Dockerfile comments are updated to match. Model: opus-5-5