coffee-bar is free software under the Apache 2.0 Licence. This page says in plain English what that means for you. The Licence is the text that binds; this page explains it.
It holds a sleep assertion while a coding agent is working, so your Mac stays awake. It releases that assertion when every agent is waiting on a human. It holds no display assertion by default, so your screen still sleeps on its normal schedule.
coffee-bar is provided as is, with no warranty of any kind. If it fails to hold your Mac awake, or holds it awake when you did not want it to, you carry that outcome. The binding text is the Apache 2.0 Licence, sections 7 and 8. A copy of the Licence ships inside the app and lives in the repository.
coffee-bar is a personal project by Carlos Eduardo Arango Gutierrez, released under Apache 2.0. It is not an NVIDIA product. NVIDIA does not endorse, support, or warrant it.
Open an issue at the issue tracker. Include the version shown at the bottom of the panel, your macOS version, what you expected, and what happened instead.
This page describes v0.3.1.