┌─────────────────────────────────────────────────────────────┐
│ Start: Which ESLint rules should I implement? │
└────────────────────┬────────────────────────────────────────┘
│
▼
┌─────────────────────┐
│ How much time do │
│ you have? │
└─┬─────────┬─────────┘
│ │
┌────────┘ └────────┐
│ │
▼ ▼
┌───────────┐ ┌────────────────┐
│ 5 minutes │ │ 4 weeks │
└─────┬─────┘ └────────┬───────┘
│ │
▼ ▼
┌─────────────────────┐ ┌──────────────────────┐
│ QUICK WINS │ │ COMPREHENSIVE │
│ │ │ │
│ 1. Security rules │ │ Week 1: High Priority│
│ (zero violations)│ │ - Security │
│ │ │ - Type imports │
│ 2. Type imports │ │ - Console rules │
│ (auto-fix) │ │ │
│ │ │ Week 2: Medium │
│ 3. prefer-const │ │ - Import order │
│ (auto-fix) │ │ - Node.js rules │
│ │ │ │
│ ✅ Zero breaking │ │ Week 3: Return types │
│ ✅ 20-30% rules │ │ - Function returns │
│ ✅ Done in 5 min │ │ (start with warn) │
└─────────────────────┘ │ │
│ Week 4+: Low Priority│
│ - Documentation │
│ - Comment quality │
│ - Test standards │
│ │
│ ✅ All 20 rules │
│ ✅ ~700 → <100 errors│
└──────────────────────┘
┌─────────────────────────────────────────────────────────────┐
│ Or: Pick specific categories you care about │
└────────────────────┬────────────────────────────────────────┘
│
▼
┌────────────┴────────────┐
│ │
▼ ▼
┌──────────┐ ┌──────────────┐
│ Priority?│ │ Goal? │
└─┬───┬───┬┘ └─┬────┬───┬───┘
│ │ │ │ │ │
High Medium Low Type Code Security
│ │ │ Safety Org
│ │ │ │ │ │
▼ ▼ ▼ ▼ ▼ ▼
HIGH PRIORITY TYPE SAFETY
├─ Security (PR #3) ├─ consistent-type-imports (PR #2)
├─ Type imports (PR #2) ├─ explicit-function-return-type (PR #5)
└─ Console rules (PR #1) └─ no-non-null-assertion
MEDIUM PRIORITY CODE ORGANIZATION
├─ Import order (PR #4) ├─ import/order (PR #4)
├─ Return types (PR #5) ├─ import/no-default-export (PR #4)
└─ Node.js rules (PR #6) └─ Comment quality (PR #8)
LOW PRIORITY SECURITY
├─ Modern JS (PR #7) ├─ no-eval (PR #3)
├─ Comments (PR #8) ├─ no-implied-eval (PR #3)
└─ Docs (PR #9) └─ prefer-promise-reject-errors (PR #3)
┌─────────────────────────────────────────────────────────────┐
│ Implementation Checklist │
└─────────────────────────────────────────────────────────────┘
Phase 1: Immediate (No Breaking Changes)
┌─────────────────────────────────────────┐
│ □ Add security baseline rules │ ← 2 min
│ □ Add modern JS rules (no-var, etc) │ ← 1 min
│ □ Verify zero violations │ ← 1 min
│ □ Commit │ ← 1 min
└─────────────────────────────────────────┘ = 5 min total
Phase 2: Auto-fixable (Week 1)
┌─────────────────────────────────────────┐
│ □ Install eslint-plugin-unicorn │ ← 1 min
│ □ Enable consistent-type-imports │ ← 2 min
│ □ Run npm run lint -- --fix │ ← 1 min
│ □ Review changes │ ← 5 min
│ □ Commit │ ← 1 min
└─────────────────────────────────────────┘ = 10 min total
Phase 3: Import Organization (Week 2)
┌─────────────────────────────────────────┐
│ □ Install eslint-plugin-import │ ← 1 min
│ □ Configure import/order │ ← 3 min
│ □ Run npm run lint -- --fix │ ← 1 min
│ □ Review changes │ ← 10 min
│ □ Test builds │ ← 2 min
│ □ Commit │ ← 1 min
└─────────────────────────────────────────┘ = 18 min total
Phase 4: Gradual Adoption (Week 3-4)
┌─────────────────────────────────────────┐
│ □ Add no-console with CLI exceptions │ ← 5 min config
│ □ Add explicit-return-type as "warn" │ ← 2 min config
│ □ Address violations gradually │ ← Ongoing
│ □ Upgrade to "error" when ready │ ← Later
└─────────────────────────────────────────┘
Phase 5: Additional Tooling (Ongoing)
┌─────────────────────────────────────────┐
│ □ Install eslint-plugin-n │
│ □ Install eslint-plugin-jsdoc (warn) │
│ □ Install eslint-plugin-eslint-comments │
│ □ Add test-specific rules │
└─────────────────────────────────────────┘
┌─────────────────────────────────────────────────────────────┐
│ Success Metrics │
└─────────────────────────────────────────────────────────────┘
Current State:
Lint errors: ~700 (mostly no-unsafe-*)
eslint-disable: 2 instances
Config: ESLint 9.32 + typescript-eslint 8.38
After Quick Wins (5 min):
New rules: 6-8 rules enabled
Violations: 0 (all zero-impact)
Rules coverage: 20-30%
After Comprehensive (4 weeks):
New rules: 20 rules enabled
Target violations: <100 errors
Rules coverage: 100%
Packages added: 6 optional plugins
┌─────────────────────────────────────────────────────────────┐
│ Rule Categories Quick Reference │
└─────────────────────────────────────────────────────────────┘
Security (PR #3) ⭐⭐⭐
no-eval, no-implied-eval, no-throw-literal
Impact: Low | Auto-fix: No | Breaking: No
Type Safety (PR #2, #5) ⭐⭐⭐
consistent-type-imports, explicit-function-return-type
Impact: High | Auto-fix: Partial | Breaking: No
Code Org (PR #4) ⭐⭐
import/order, import/no-default-export
Impact: Medium | Auto-fix: Yes | Breaking: No
Console (PR #1) ⭐⭐
no-console (with CLI exceptions)
Impact: Medium | Auto-fix: No | Breaking: No
Node.js (PR #6) ⭐⭐
n/no-deprecated-api, n/prefer-node-protocol
Impact: Low | Auto-fix: Partial | Breaking: No
Modern JS (PR #7) ⭐
prefer-const, no-var, prefer-template
Impact: Low | Auto-fix: Yes | Breaking: No
Comments (PR #8) ⭐
no-warning-comments, eslint-comments/*
Impact: Low | Auto-fix: Partial | Breaking: No
Docs (PR #9) ⭐
jsdoc/require-jsdoc
Impact: High | Auto-fix: No | Breaking: No
Tests (PR #10) ⭐
Test-specific overrides
Impact: Low | Auto-fix: No | Breaking: No
┌─────────────────────────────────────────────────────────────┐
│ When to Use Which Document │
└─────────────────────────────────────────────────────────────┘
ESLINT_README.md
├─ First-time reading
├─ Need overview
└─ Choosing your path
ESLINT_RECOMMENDATIONS.md
├─ Understanding patterns
├─ Deep analysis
└─ The "why" behind rules
ESLINT_PR_PROPOSALS.md
├─ Creating PRs
├─ Copy-paste configs
└─ Step-by-step guides
ESLINT_QUICKSTART.md
├─ Just getting started
├─ Need templates
└─ Quick reference
┌─────────────────────────────────────────────────────────────┐
│ Decision: Start Now! │
└─────────────────────────────────────────────────────────────┘
Choose your path above ↑
Then:
1. Open the appropriate document
2. Follow the steps
3. Commit changes
4. Ship it! 🚀
All paths lead to better code quality!