report and trees take optional PATH operands and use only the records
at or below them. Operands are made absolute and cleaned as text, never
looked up on the filesystem; each reported copy is still checked on
disk. An empty operand is a usage error, as --exclude "" is, since it
would name the working directory. With operands, trees reports only
directories at or below an operand: any other directory lies above an
operand and can hold unused files, so its digest neither gets reported
nor suppresses its children's group. The summary still counts every
record read.
Model: opus-5-5
sneak