X_COVERAGE_BELOW_FLOOR
Means
the unit suite covers less of the app than x.verify.json states
Typical cause
Line or function coverage of the app's own source — every .ts/.tsx under apps/ and packages/, a file no unit test loads counted at 0% — is under the coverage floor in x.verify.json. A test was deleted, or source landed without one. The finding names the measured and required numbers and the ten files that lose the most lines
Fix
x verify --only unit --json — names the ten files losing the most lines; cover the worst with a test beside it