A regular CodeResources file replaced by a directory or FIFO before open was reported absent. That hid the replacement; it is now unreadable with reason changed. A failed anchor apple probe kept only an exit code. The caller-visible limitation now includes the probe's diagnostic. Definitive codesign rejections are a phrase list, including unrecognized bundle format, instead of one growing regular expression. Unlisted nonzero diagnostics stay unknown. Co-authored-by: Cursor Agent <cursoragent@cursor.com>