Case study
ProjectsLedgerCategory budgets stay on the same store as the spend
Category budgets stay on the same store as the spend
Ledger
Production
Stack
- Next.js
- React
- TypeScript
- Tailwind
- Zod
- TanStack Form
- TanStack Query
- TanStack Pacer
- TanStack Table
- TanStack Charts
- Postgres
- Motion
Summary
Budgets create, edit, and delete a category maximum, then show spend, remaining, and the latest matching transactions.
Result
Allocation stays honest when a category is empty. Mutations are owned by the signed-in account.
Lesson
A budget screen copied from a challenge is not a budget until it writes to that person’s store.