Documentation Code Examples Verification

Analyze documentation for code examples that don't match the actual codebase.

Detection Patterns

1. Incorrect Class Name in Example

<!-- DOC says: -->
```php
use App\Service\OrderProcessor;
$processor = new OrderProcessor();

<!-- But actual class is App\Application\Order\ProcessOrderUseCase -->

### 2. Wrong Method Signature

```markdown
<!-- DOC says: -->
```php
$user = $repository->findByEmail($email);

<!-- But actual method signature is: -->

public function findByEmail(Email $email): ?User  // Uses Email VO, not string

3. Outdated Namespace

<!-- DOC says: -->
```php
use App\Models\User;  // Laravel-style

<!-- But project uses DDD structure: -->

use App\UserManagement\Domain\Entity\User;

4. Missing Required Parameters

<!-- DOC says: -->
```php
$order = Order::create($userId, $items);

<!-- But actual method requires: -->

Order::create(UserId $userId, ItemCollection $items, Currency $currency, Address $shippingAddress)

5. Deprecated API in Examples

<!-- DOC says: -->
```php
$service->process($data);  // process() was renamed to execute()

<!-- Method was renamed but docs not updated -->

Verification Process

Step 1: Extract Code Blocks from Docs

# Find PHP code blocks in markdown
Grep: "```php" --glob "**/*.md" -A 20

# Find inline code references
Grep: "`[A-Z][a-zA-Z]+::[a-z]" --glob "**/*.md"
Grep: "`\\$[a-z]+->|new [A-Z]" --glob "**/*.md"

Step 2: Verify Class References

# For each class mentioned in docs, verify it exists
# Example: doc mentions "OrderProcessor"
Grep: "class OrderProcessor" --glob "**/*.php"

# Verify namespace matches
Grep: "namespace.*Order" --glob "**/*.php"

Step 3: Verify Method Signatures

# For each method call in doc examples
# Example: doc mentions "$repo->findByEmail($email)"
Grep: "function findByEmail" --glob "**/*.php"
# Compare parameter types and count

Step 4: Check Import Paths

# For each use statement in doc examples
# Example: "use App\Service\OrderProcessor"
Glob: **/Service/OrderProcessor.php
# If not found, search for actual location
Grep: "class OrderProcessor" --glob "**/*.php"

Step 5: Verify Constructor Parameters

# For each "new ClassName(...)" in docs
# Verify constructor matches
Grep: "class OrderProcessor" --glob "**/*.php" -A 20
# Check __construct parameters

Severity Classification

Pattern	Severity
Non-existent class in install/quickstart	🔴 Critical
Wrong method signature in API docs	🔴 Critical
Outdated namespace in examples	🟠 Major
Missing required parameters	🟠 Major
Deprecated method in examples	🟡 Minor
Style difference (not functional)	🟡 Minor

Output Format

### Code Example Mismatch: [Description]

**Severity:** 🔴/🟠/🟡
**Documentation:** `file.md:line`
**Code Reference:** `src/path/File.php:line`

**In Documentation:**
```php
// What the doc says

In Actual Code:

// What the code actually is

Fix: Update documentation to match current code.

## Summary Report Format

```markdown
## Code Examples Verification

| Metric | Count |
|--------|-------|
| Code blocks checked | X |
| Valid examples | X |
| Class name mismatches | X |
| Method signature mismatches | X |
| Namespace mismatches | X |
| Deprecated API usage | X |

### Mismatched Examples

| Doc File | Line | Reference | Issue |
|----------|------|-----------|-------|
| `README.md` | 45 | `OrderProcessor` | Class not found |
| `docs/api.md` | 78 | `findByEmail()` | Wrong parameters |