To say even more, it's actually very much a crippled less (not all of its functions available!). With just one feature added, namely:

> in the input box at the top of the screen, start writing any bash pipeline; then press Enter to execute the command you typed, and the Ultimate Plumber will immediately show you the output of the pipeline in the scrollable window.

At least for me personally, it was painfully worth reimplementing the crippled less functionalities for this single little addition. Though I do admit I felt the lack of the slash-to-search feature of less already yesterday when using up...

And, to explain myself a bit, I really tried my best at explaining the tool in the readme... it's just that I can't currently think of any better wording :( If by any chance you had some idea/suggestion how you think I could improve it, I'd be super eager to hear it! I'm kinda too deep in the trenches to be able to look at it from a distance, so even seemingly obvious (to you) comments (as the one with the comparison to less, after you explained it) are sincerely valuable to me!