It said that grep treats "found nothing" and "worked" as the same result. grep exits with 0 when it finds a line, with 1 when it finds nothing, and with 2 on an error, so it is the usual exception. The text now says so, and it says why MeshTerm uses 5: 1 is already FAILURE. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>