update platform_support file

Author: raju-opti

.eslintrc.js

@@ -31,6 +31,7 @@ module.exports = {
     {
       'files': ['lib/**/*.ts', 'src/**/*.ts'],
       'excludedFiles': [
+        '**/platform_support.ts',
         '**/*.spec.ts',
         '**/*.test.ts',
         '**/*.tests.ts',

.platform-isolation.config.js

@@ -13,6 +13,9 @@ module.exports = {
 
   // Files and patterns to exclude from validation
   exclude: [
+    // Platform definition file (this file defines Platform type, doesn't need __platforms)
+    '**/platform_support.ts',
+    
     // Test files
     '**/*.spec.ts',
     '**/*.test.ts',

lib/platform_support.ts

@@ -1,59 +1,17 @@
-/**
- * Platform Support Type Definitions
- * 
- * Every source file (except tests) must export __platforms to declare
- * which platforms it supports. This is enforced at both type-level and runtime.
- */
-
-/**
- * Valid platform identifiers
- */
-export type Platform = 'browser' | 'node' | 'react_native' | '__universal__';
-
-
-/**
- * Platform support declaration
- * 
- * Every file must export this to declare which platforms it supports:
- * - Specific platforms: export const __platforms = ['browser', 'node'];
- * - All platforms (universal): export const __platforms = ['__universal__'];
- * 
- * @example
- * // Browser and React Native only
- * export const __platforms = ['browser', 'react_native'] satisfies Platform[];
- * 
- * @example
- * // Node.js only
- * export const __platforms = ['node'] satisfies Platform[];
- * 
- * @example  
- * // Universal (all platforms)
- * export const __platforms = ['__universal__'] satisfies Platform[];
- */
-export type SupportedPlatforms = readonly Platform[];
 
 /**
- * Helper type to enforce that a module exports __platforms
- * 
- * Usage in your module:
- * ```typescript
- * import type { RequirePlatformDeclaration, Platform } from './platform_support';
+ * ⚠️ WARNING: DO NOT MOVE, DELETE, OR RENAME THIS FILE
  * 
- * export const __platforms = ['browser'] satisfies Platform[];
+ * This file is used by the build system and validation scripts:
+ * - scripts/validate-platform-isolation-ts.js
+ * - scripts/platform-utils.js
+ * - eslint-local-rules/require-platform-declaration.js
  * 
- * // This type check ensures __platforms is exported
- * // type _Check = RequirePlatformDeclaration<typeof import('./your-module')>;
- * ```
+ * These tools parse this file at build time to extract the Platform type definition.
+ * Moving or renaming this file will break the build.
  */
-export type RequirePlatformDeclaration<T> = T extends { __platforms: readonly Platform[] }
-  ? T
-  : never & { error: '__platforms export is required' };
 
 /**
- * Utility to check if a file is universal (supports all platforms)
+ * Valid platform identifiers
  */
-export function isUniversal(platforms: readonly Platform[]): boolean {
-  return platforms.length === 1 && platforms[0] === '__universal__';
-}
-
-export const __platforms: Platform[] = ['__universal__'];
+export type Platform = 'browser' | 'node' | 'react_native' | '__universal__';