# Backend Fastify / Prisma

## Scope

Server work lives under `server/`. Prefer existing route, service, utility and
QA script patterns over new abstractions.

## Rules

- Validate Prisma changes with `cd server && npm run prisma:validate`.
- For route/service edits, run `node --check` on the touched files and the
  focused regression listed in the current Trellis task.
- Prisma migrations require rollback notes in the Trellis task design or PRD.
- Do not resolve migration drift, reset databases, or rewrite migration history
  without explicit approval.
- Workflow, approval and permission behavior must be verified at process level,
  not only syntax level.

## Common Checks

- `cd server && node --check src/routes/reimbursements.js`
- `cd server && node --check src/routes/workflow.js`
- `cd server && ./scripts/regression-workflow-actions.sh`
- `cd server && ./scripts/regression-all.sh`