Given the traction you got here and the advancements in AI, I'm sure this can become a very attractive hobby project for Rust beginners, there's probably a lot of easy bugs to fix. Fixing bugs, adding new features, and optimizing the code is all you need.
Here's an idea to get the ball rolling: Create a scratch buffer for Gemini CLI (or your favorite LLM) and enable it to interact with the various windows and panes of the tmux session.
Here's my use case, I use synchronized panes to send the commands into multiple servers, but some commands sometimes fail for various reasons. What if I can just ask the AI to send a series of commands and react based on the output and adjust along the way. It's like a dynamically generated custom shell script on the fly.