chore: import upstream snapshot with attribution

2026-07-13 11:55:55 +08:00
commit d48cda4081
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+---
+description: "PHP coding style extending common rules"
+globs: ["**/*.php", "**/composer.json"]
+alwaysApply: false
+---
+# PHP Coding Style
+
+> This file extends the common coding style rule with PHP specific content.
+
+## Standards
+
+- Follow **PSR-12** formatting and naming conventions.
+- Prefer `declare(strict_types=1);` in application code.
+- Use scalar type hints, return types, and typed properties everywhere new code permits.
+
+## Immutability
+
+- Prefer immutable DTOs and value objects for data crossing service boundaries.
+- Use `readonly` properties or immutable constructors for request/response payloads where possible.
+- Keep arrays for simple maps; promote business-critical structures into explicit classes.
+
+## Formatting
+
+- Use **PHP-CS-Fixer** or **Laravel Pint** for formatting.
+- Use **PHPStan** or **Psalm** for static analysis.