$ yg check --top 0
exit: 1
--- stdout
--- stderr
error[usage]: --top expects a positive whole number (1 or more); got "0".
  why:  --top N prints the N highest-priority issue blocks. Zero, a negative, fractional, or non-numeric value is meaningless, and printing the full wall instead would silently hide that the flag was ignored — masking the very output you tried to narrow.
next: yg check --top 5 (top 5 blocks), yg check --top (the single suggested-next group), or yg check (full output).
