## Summary
`yarn build:common-utils` was running slowly for me and had to restart server lots - this speeds up local dev start time when using `yarn dev` because it only rebuilds common utils if there are changes.
### Screenshots or video
Cache (new):
<img width="936" height="260" alt="
Screenshot 2026-03-10 at 4 08 13 PM" src="https://github.com/user-attachments/assets/d7ede0cf-19ec-4c82-943e-7612476b8c2b" />
No Cache (before/changes):
<img width="1003" height="171" alt="Screenshot 2026-03-10 at 4 05 04 PM" src="https://github.com/user-attachments/assets/cca32b6f-1981-4c3a-8e2f-3d2d98ce5f06" />
### How to test locally or on Vercel
1. Run `yarn dev` see build required
2. Restart server, see its cached
3. Change `common-utils` restart server, see build required