Agreed. `tee` without any flags is essentially a no-op and doesn’t have much use, whereas teemoji does. This feels more like `nl` in the sense that it outputs

Agreed. `tee` without any flags is essentially a no-op and doesn’t have much use, whereas teemoji does. This feels more like `nl` in the sense that it outputs its STDIN with something prepended. But with the additional support for splitting the stream, in which case its STDOUT is unmodified like tee. I still absolutely love this project. It’s inspired me to play around with CoreML.