The issue the OP mentions was likely a known memory-leak in Ghostty that has since been fixed. Claude was triggering the bug in Ghostty but the bug was in Ghostty. Ghostty's author blogged about it

https://mitchellh.com/writing/ghostty-memory-leak-fix

I might not be using the correct terms. But, here is what I was seeing:

- in a running session text display would slow down intermittently. Like 2-3 words a second

- occasionally terminal would stop, some times in the middle of showing a response, and would need to restart the terminal to get it back. But I tailed the session logs and Claude code didn’t think anything was amiss. It was proceeding like normal

After switching to Ghostty these issues went away and has been rock solid since then.

EDIT: formatting