Ran down Mos's flag. Both hypotheses were wrong: CI runs exactly 'pnpm test' (same
command, path IS exercised) and is green, while this host exits 97 on an
environment-dependent BASH_LINENO guard (#973) that aborts on bash 5.2.15 and not in
CI's container. PR #1027 touches zero files under packages/mosaic, so the guard is
genuinely pre-existing — f10-coder's report was accurate in every particular, and main
is equally affected here.
Not 'merges step around a red' but something worse in one respect: the local gate and
the CI gate disagree about what passing means. No agent on this host can get a green
pnpm test on any branch. A gate only CI can run cannot be a pre-push gate.
Second defect found while establishing this: in the main checkout the same package
fails differently (exit 1) because a test scans the working tree and picks up
apps/coordinator/venv third-party site-packages. A test whose verdict depends on
untracked files is not hermetic — same contamination source that broke format:check,
one foreign tree breaking two independent gates.
Coordinate with #1007/#1024 rather than opening a third lane.
Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
