[Feature Request] Customizable session titles with project prefix support

Feature request: customizable session titles

Please add a way to influence auto-generated session titles. My use case: I want every title prefixed with the current project folder name, so sessions are easy to scan and group by project in history.

Any of these would work:

sessionTitlePrefix in settings.json, with template vars like {cwd_basename}_
A SessionTitleGenerate hook to transform the title
Or just make the title generator respect CLAUDE.md
Currently there's no workaround — CLAUDE.md isn't read by the title generator, and hooks can't rename sessions. Thanks!