initial commit

.claude/skills/laravel-best-practices/rules/security.md

@@ -0,0 +1,198 @@
+# Security Best Practices
+
+## Mass Assignment Protection
+
+Every model must define `$fillable` (whitelist) or `$guarded` (blacklist).
+
+Incorrect:
+```php
+class User extends Model
+{
+    protected $guarded = []; // All fields are mass assignable
+}
+```
+
+Correct:
+```php
+class User extends Model
+{
+    protected $fillable = [
+        'name',
+        'email',
+        'password',
+    ];
+}
+```
+
+Never use `$guarded = []` on models that accept user input.
+
+## Authorize Every Action
+
+Use policies or gates in controllers. Never skip authorization.
+
+Incorrect:
+```php
+public function update(Request $request, Post $post)
+{
+    $post->update($request->validated());
+}
+```
+
+Correct:
+```php
+public function update(UpdatePostRequest $request, Post $post)
+{
+    Gate::authorize('update', $post);
+
+    $post->update($request->validated());
+}
+```
+
+Or via Form Request:
+
+```php
+public function authorize(): bool
+{
+    return $this->user()->can('update', $this->route('post'));
+}
+```
+
+## Prevent SQL Injection
+
+Always use parameter binding. Never interpolate user input into queries.
+
+Incorrect:
+```php
+DB::select("SELECT * FROM users WHERE name = '{$request->name}'");
+```
+
+Correct:
+```php
+User::where('name', $request->name)->get();
+
+// Raw expressions with bindings
+User::whereRaw('LOWER(name) = ?', [strtolower($request->name)])->get();
+```
+
+## Escape Output to Prevent XSS
+
+Use `{{ }}` for HTML escaping. Only use `{!! !!}` for trusted, pre-sanitized content.
+
+Incorrect:
+```blade
+{!! $user->bio !!}
+```
+
+Correct:
+```blade
+{{ $user->bio }}
+```
+
+## CSRF Protection
+
+Include `@csrf` in all POST/PUT/DELETE Blade forms. Not needed in Inertia.
+
+Incorrect:
+```blade
+<form method="POST" action="/posts">
+    <input type="text" name="title">
+</form>
+```
+
+Correct:
+```blade
+<form method="POST" action="/posts">
+    @csrf
+    <input type="text" name="title">
+</form>
+```
+
+## Rate Limit Auth and API Routes
+
+Apply `throttle` middleware to authentication and API routes.
+
+```php
+RateLimiter::for('login', function (Request $request) {
+    return Limit::perMinute(5)->by($request->ip());
+});
+
+Route::post('/login', LoginController::class)->middleware('throttle:login');
+```
+
+## Validate File Uploads
+
+Validate MIME type, extension, and size. Never trust client-provided filenames.
+
+```php
+public function rules(): array
+{
+    return [
+        'avatar' => ['required', 'image', 'mimes:jpg,jpeg,png,webp', 'max:2048'],
+    ];
+}
+```
+
+Store with generated filenames:
+
+```php
+$path = $request->file('avatar')->store('avatars', 'public');
+```
+
+## Keep Secrets Out of Code
+
+Never commit `.env`. Access secrets via `config()` only.
+
+Incorrect:
+```php
+$key = env('API_KEY');
+```
+
+Correct:
+```php
+// config/services.php
+'api_key' => env('API_KEY'),
+
+// In application code
+$key = config('services.api_key');
+```
+
+## Audit Dependencies
+
+Run `composer audit` periodically to check for known vulnerabilities in dependencies. Automate this in CI to catch issues before deployment.
+
+```bash
+composer audit
+```
+
+## Encrypt Sensitive Database Fields
+
+Use `encrypted` cast for API keys/tokens and mark the attribute as `hidden`.
+
+Incorrect:
+```php
+class Integration extends Model
+{
+    protected function casts(): array
+    {
+        return [
+            'api_key' => 'string',
+        ];
+    }
+}
+```
+
+Correct:
+```php
+class Integration extends Model
+{
+    protected $hidden = ['api_key', 'api_secret'];
+
+    protected function casts(): array
+    {
+        return [
+            'api_key' => 'encrypted',
+            'api_secret' => 'encrypted',
+        ];
+    }
+}
+```