fix: update Jest and TypeScript configuration for ES modules

Author: sapientpants

jest.config.js

@@ -1,18 +1,28 @@
 /** @type {import('jest').Config} */
 export default {
-  preset: 'ts-jest',
+  preset: 'ts-jest/presets/default-esm',
   testEnvironment: 'node',
   testMatch: ['**/__tests__/**/*.test.ts'],
-  collectCoverageFrom: ['src/**/*.ts', '!src/**/*.test.ts'],
-  coverageDirectory: 'coverage',
-  coverageReporters: ['text', 'lcov'],
-  transform: {
-    '^.+\\.ts$': ['ts-jest', {
-      useESM: true,
-    }],
-  },
-  extensionsToTreatAsEsm: ['.ts'],
   moduleNameMapper: {
     '^(\\.{1,2}/.*)\\.js$': '$1',
   },
+  transform: {
+    '^.+\\.tsx?$': [
+      'ts-jest',
+      {
+        useESM: true,
+      },
+    ],
+  },
+  extensionsToTreatAsEsm: ['.ts'],
+  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],
+  transformIgnorePatterns: [
+    'node_modules/(?!(@modelcontextprotocol)/)'
+  ],
+  collectCoverageFrom: [
+    'src/**/*.ts',
+    '!src/**/*.d.ts',
+    '!src/**/*.test.ts',
+  ],
+  coverageReporters: ['text', 'lcov'],
 }; 

tsconfig.json

@@ -10,7 +10,8 @@
     "skipLibCheck": true,
     "forceConsistentCasingInFileNames": true,
     "declaration": true,
-    "sourceMap": true
+    "sourceMap": true,
+    "isolatedModules": true
   },
   "include": ["src/**/*"],
   "exclude": ["node_modules", "dist", "**/*.test.ts"]