# TODO List - Deprecation Fixes & Testing Recommendations

**Last Updated**: 2024-12-28  
**Status**: All recommendations documented

---

## ✅ Completed Tasks

1. ✅ **Removed @types/pino** - Pino v8 includes built-in types
2. ✅ **Upgraded ESLint to v9** - All apps and root updated
3. ✅ **Updated TypeScript ESLint to v8** - ESLint 9 compatible
4. ✅ **Created ESLint 9 flat config** - `eslint.config.js` created
5. ✅ **Updated lint-staged config** - Works with ESLint 9

---

## 🔄 In Progress

### Testing & Verification

1. **Test ESLint 9 Migration** ⏳
   - [ ] Run `pnpm lint` from root - verify all packages lint
   - [ ] Test each service individually
   - [ ] Test each package individually
   - [ ] Test each app individually
   - [ ] Verify flat config is being used
   - [ ] Check for ESLint errors or warnings

2. **Verify No ESLint 8 Warnings** ⏳
   - [ ] Run `pnpm install` and check for ESLint warnings
   - [ ] Verify all apps use ESLint 9
   - [ ] Check services for ESLint dependencies
   - [ ] Verify no ESLint 8 references remain

---

## 📋 Pending Tasks

### High Priority Testing

3. **Test TypeScript Compilation** 📋
   - [ ] Run `pnpm type-check` from root
   - [ ] Verify all packages compile successfully
   - [ ] Fix any TypeScript errors
   - [ ] Test each package individually

4. **Test Builds** 📋
   - [ ] Run `pnpm build` from root
   - [ ] Verify all packages build successfully
   - [ ] Test each service build
   - [ ] Test each package build
   - [ ] Test each app build

5. **Test Unit Tests** 📋
   - [ ] Run `pnpm test` from root
   - [ ] Verify all tests pass
   - [ ] Check test coverage
   - [ ] Fix any failing tests

6. **Test Next.js ESLint Compatibility** 📋
   - [ ] Test `next lint` in portal-public
   - [ ] Test `next lint` in portal-internal
   - [ ] Verify Next.js ESLint config works with ESLint 9
   - [ ] Update Next.js ESLint config if needed

### Medium Priority

7. **Test Pre-commit Hooks** 📋
   - [ ] Make test commit with linting errors
   - [ ] Verify errors are caught
   - [ ] Make test commit with formatting issues
   - [ ] Verify auto-fix works
   - [ ] Test lint-staged with ESLint 9

8. **Test CI/CD Pipelines** 📋
   - [ ] Verify GitHub Actions workflows run
   - [ ] Check lint job passes
   - [ ] Check type-check job passes
   - [ ] Check test job passes
   - [ ] Check build job passes

9. **Update Service ESLint Configs** 📋
   - [ ] Check if services need package-specific ESLint configs
   - [ ] Update service configs if needed
   - [ ] Verify services use root config or have their own

10. **Test ESLint Config Compatibility** 📋
    - [ ] Verify flat config works with all packages
    - [ ] Test rule overrides
    - [ ] Verify plugin compatibility
    - [ ] Test type-checking rules

### Low Priority / Cleanup

11. **Remove Old ESLint Config** 📋
    - [ ] After verification, remove `.eslintrc.js`
    - [ ] Update any references to old config
    - [ ] Document migration in commit message

12. **Document ESLint 9 Migration** 📋
    - [ ] Update README with ESLint 9 info
    - [ ] Document flat config format
    - [ ] Update contributing guide
    - [ ] Add migration notes

13. **Monitor Subdependencies** 📋
    - [ ] Set up quarterly review process
    - [ ] Create script to check outdated packages
    - [ ] Document update strategy
    - [ ] Schedule first review (3 months)

14. **Test Integration Tests** 📋
    - [ ] Run integration tests
    - [ ] Verify service-to-service communication
    - [ ] Test database operations
    - [ ] Test external service integrations

15. **Test Error Handling** 📋
    - [ ] Verify ESLint errors are properly reported
    - [ ] Test error messages are clear
    - [ ] Verify error recovery

16. **Test Prettier Integration** 📋
    - [ ] Verify Prettier works with ESLint 9
    - [ ] Test formatting on commit
    - [ ] Verify no conflicts

17. **Performance Testing** 📋
    - [ ] Measure lint time
    - [ ] Compare with ESLint 8
    - [ ] Verify no significant slowdown
    - [ ] Document performance metrics

---

## 🎯 Priority Order

### Immediate (This Week)
1. ✅ Test ESLint 9 migration (linting)
2. ✅ Verify no ESLint 8 warnings
3. ⏳ Test TypeScript compilation
4. ⏳ Test builds
5. ⏳ Test unit tests

### Short Term (Next Week)
6. ⏳ Test Next.js ESLint compatibility
7. ⏳ Test pre-commit hooks
8. ⏳ Test CI/CD pipelines
9. ⏳ Update service ESLint configs if needed

### Medium Term (Next Month)
10. ⏳ Remove old ESLint config
11. ⏳ Document migration
12. ⏳ Set up subdependency monitoring

### Ongoing
13. ⏳ Monitor subdependencies quarterly
14. ⏳ Performance monitoring

---

## 📊 Testing Status

### Completed ✅
- Removed @types/pino
- Upgraded ESLint to v9
- Updated TypeScript ESLint to v8
- Created ESLint 9 flat config
- Updated lint-staged config

### In Progress ⏳
- ESLint 9 migration testing
- Warning verification

### Pending 📋
- TypeScript compilation tests
- Build tests
- Unit tests
- Integration tests
- CI/CD tests
- Documentation

---

## 🚀 Quick Start Testing

```bash
# 1. Verify installation
pnpm install

# 2. Check warnings
pnpm install 2>&1 | grep -i "WARN" | grep -v "subdependencies"

# 3. Test linting
pnpm lint

# 4. Test type checking
pnpm type-check

# 5. Test builds
pnpm build

# 6. Test tests
pnpm test
```

---

## 📝 Notes

- ESLint 9 uses flat config (ES modules)
- Old `.eslintrc.js` can be kept for reference
- Next.js may need special configuration
- Some packages may need package-specific configs
- Subdependency warnings are informational only

---

## ✅ Success Criteria

All tasks complete when:
- ✅ All linting passes
- ✅ All type checks pass
- ✅ All builds succeed
- ✅ All tests pass
- ✅ Git hooks work
- ✅ CI/CD passes
- ✅ No critical warnings
- ✅ Documentation updated