What’s so special about PS1? Fun with customizing Bash command prompts

The text discusses the implementation of support for PS1 in Warp, a terminal emulator. It explains how PS1 is used to generate prompts and its various versions. The author mentions that initially, they did not support PS1 in Warp due to potential clashes with bootstrapping scripts and PRECMD/PREEXEC hooks. However, as users requested custom prompt setups, the team decided to honor user's PS1 settings. They explain how they use metadata from the shell to render prompts in Warp and the challenges faced while implementing support for PS1. The text also touches upon escape sequences, device control strings (DCS), and some fun shell tricks. It concludes by mentioning that Warp now supports most PS1 configurations and is working on improving the user experience further with features like Context Chips.