┌─────────────────────────────────────┐
│         FILES CHANGED               │
└─────────────────┬───────────────────┘
                  │
                  ▼
        ┌─────────────────┐
        │ > 3 files?      │
        └────────┬────────┘
                 │
       ┌─────────┴─────────┐
       │                   │
      Yes                  No
       │                   │
       ▼                   ▼
   MAJOR             ┌─────────────────┐
                     │ Public API      │
                     │ changed?        │
                     └────────┬────────┘
                              │
                     ┌────────┴────────┐
                     │                 │
                    Yes                No
                     │                 │
                     ▼                 ▼
                  MAJOR          ┌─────────────────┐
                                 │ Behavioral      │
                                 │ change?         │
                                 └────────┬────────┘
                                          │
                                 ┌────────┴────────┐
                                 │                 │
                                Yes                No
                                 │                 │
                                 ▼                 ▼
                              MAJOR             MINOR

# Find all files that import the changed module
grep -r "import.*from.*'./changed-module'" src/

# Find all usages of changed function
grep -r "changedFunction" src/

# What does the changed code import?
grep "import" src/changed-file.ts

# Trace the dependency chain

Changed function
     │
     ├── Called by: parentFunction()  ← Review this
     │        │
     │        └── Called by: grandparent()  ← Review if behavior changed
     │
     └── Calls: childFunction()  ← Review if inputs changed
              │
              └── Calls: database.save()  ← Review if data shape changed

## Review Scope: MINOR

**Changed files:**
- src/utils/format.ts (10 lines)

**Review focus:**
- New formatDate() function
- Associated tests

**Not reviewing:**
- Callers of format module (unchanged behavior)

## Review Scope: MAJOR

**Changed files:**
- src/services/auth.ts
- src/middleware/authenticate.ts
- src/routes/login.ts
- src/models/session.ts
- tests/auth.test.ts

**Impacted code to review:**
- src/routes/protected/* (use auth middleware)
- src/services/user.ts (calls auth service)

**Integration points:**
- Login flow end-to-end
- Session management
- Protected route access

**Review focus:**
- All changed code
- All callers of auth service
- Auth middleware consumers
- Session handling throughout

// Small change, but MAJOR scope
// Changing default timeout affects all HTTP calls
const DEFAULT_TIMEOUT = 30000; // Was 5000

// Renamed variable across 20 files
// No behavior change