## What does this do?

A brief description of the change.

## Why?

What problem this solves or what it improves.

## How to test

Steps to verify this works, or note if existing tests cover it.

## Checklist

- [ ] `cargo fmt` passes
- [ ] `cargo clippy -- -D warnings` passes
- [ ] `cargo test` passes
- [ ] I've tested this with tmux + Claude Code (if applicable)
