Row 39 round 2, Darkwing. Tree: worktree at b9b6cf00, build.patch applied, candidate-manifest 29/29 OK.
Each mutant edits one file, runs one test file, then restores it. The manifest checked 29/29 OK afterwards.

MF1 notifier.mjs openJournal: drop "|| (ds.mode & 0o077) !== 0" from the directory check
  node --test packages/cli/tests/notifier.test.mjs: 15 pass, 1 fail (killed)
  fails: "the journal: a loose file mode, a loose directory or a symlinked journal refuses"
MF3 mosaic-bus.service.in: add After=network-online.target and Wants=network-online.target under Description=
  node --test packages/cli/tests/host.test.mjs: 8 pass, 1 fail (killed)
  fails: "bus-service.sh renders the unit and installs it into a given directory"
