The hook incremented a bare counter at 13 sites and ended with "N check(s)
failed. Fix the errors above." — naming nothing. Six of those sites (fmt,
clippy, cargo test, deny, ruff, tooling) print no FAIL line at all, so a
failure was only inferable from the ABSENCE of an "— OK" line.
Hit for real today: a push aborted on cargo fmt, and the verdict was
indistinguishable from any other failure. Finding the cause meant scrolling
past thousands of lines of unrelated test-fixture output, because the one
actionable line said only that something, somewhere, had failed.
Failed checks are now collected by name and printed in a self-contained
final block, so tailing the log always shows WHAT broke — plus a pointer to
grep the failing check's own output, and the reminder that fmt auto-fixes.
Note this is NOT a verbosity reduction, which was the tempting fix. Detail is
exactly what you want when something fails; the defect was that the verdict
carried no information, not that the log carried too much.
Co-Authored-By: Claude <noreply@anthropic.com>