The leak guard in scripts/check-test-isolation.mjs reported
fusion-test-home-root-* dirs created by scripts/test-changed.mjs as
leaks when transient EBUSY on /var/folders prevented cleanup or the
baseline file got rotated. Track every HOME basename the script mints
and pass it via FUSION_TEST_ISOLATION_IGNORE_NAMES so the check
allow-lists them unconditionally. Surface cleanup rm failures via
console.warn instead of swallowing.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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