---
# nuzlocke-tracker-ve9f
title: Fix linting errors across backend and frontend
status: completed
type: task
priority: normal
created_at: 2026-02-10T11:21:24Z
updated_at: 2026-02-10T11:28:08Z
---

The CI pipeline is now running but linting fails on both backend and frontend. Clean up all lint errors so CI passes green.

## Backend (ruff)

- **236 errors** found, **126 auto-fixable** with `ruff check --fix`
- **44 files** need reformatting with `ruff format`
- Most issues are in alembic migrations (auto-generated boilerplate: `Union` → `X | Y`, import sorting, unused imports) and across API/model/seed files (formatting, datetime.UTC, loop variable issues)
- Fix approach:
  1. Run `ruff check --fix backend/` to auto-fix 126 issues
  2. Run `ruff format backend/` to reformat 44 files
  3. Manually fix remaining ~110 issues (B023 loop variable binding, SIM117, etc.)

## Frontend (eslint + tsc)

- Run `cd frontend && npm ci && npm run lint` to see errors
- Run `npx tsc -b` for type checking
- Fix any reported issues

## Checklist

- [x] Auto-fix backend ruff lint errors (`ruff check --fix backend/`)
- [x] Auto-format backend files (`ruff format backend/`)
- [x] Manually fix remaining backend lint errors
- [x] Fix frontend eslint errors
- [x] Fix frontend TypeScript errors (if any)
- [ ] Verify CI passes green on develop