Upgrade workspace to TypeScript 6 (#2700)

* Upgrade workspace to TypeScript 6

* Restore Nest baseUrl for SWC builds

* Use empty changeset for TS6 upgrade

* Remove TS6 changeset

docs/tsconfig.json

@@ -1,6 +1,5 @@
 {
   "compilerOptions": {
-    "baseUrl": ".",
     "target": "ESNext",
     "lib": ["dom", "dom.iterable", "esnext"],
     "allowJs": true,
@@ -17,7 +16,7 @@
     "incremental": true,
     "paths": {
       "@/*": ["./*"],
-      "@/.source": [".source"]
+      "@/.source": ["./.source"]
     },
     "plugins": [
       {

packages/ai/tsconfig.json

@@ -2,6 +2,7 @@
   "extends": "@workflow/tsconfig/base.json",
   "compilerOptions": {
     "outDir": "dist",
+    "rootDir": "./src",
     "lib": ["dom", "dom.iterable", "esnext"]
   },
   "include": ["src"],

packages/astro/tsconfig.json

@@ -2,9 +2,9 @@
   "extends": "@workflow/tsconfig/base.json",
   "compilerOptions": {
     "outDir": "dist",
+    "rootDir": "./src",
     "target": "es2022",
     "module": "preserve",
-    "baseUrl": ".",
     "moduleResolution": "bundler"
   },
   "include": ["src"],

packages/cli/tsconfig.json

@@ -2,6 +2,7 @@
   "extends": "@workflow/tsconfig/base.json",
   "compilerOptions": {
     "outDir": "dist",
+    "rootDir": "./src",
     "target": "es2022",
     "module": "node16",
     "moduleResolution": "node16",

packages/core/tsconfig.json

@@ -1,7 +1,8 @@
 {
   "extends": "@workflow/tsconfig/base.json",
   "compilerOptions": {
-    "outDir": "dist"
+    "outDir": "dist",
+    "rootDir": "./src"
   },
   "include": ["src"],
   "exclude": ["node_modules", "**/*.test.ts"]

packages/docs-typecheck/src/type-checker.ts

@@ -119,20 +119,23 @@ const compilerOptions: ts.CompilerOptions = {
 };
 
 /**
- * Modules that we explicitly resolve via `paths` mappings. A TS2307
- * ("Cannot find module") error for any of these is a real regression and
- * must NOT be silenced.
+ * Modules that we explicitly resolve via `paths` mappings. Missing-module
+ * errors for any of these are real regressions and must NOT be silenced.
  */
 const RESOLVED_MODULES = new Set(Object.keys(compilerOptions.paths ?? {}));
 
 /**
- * Returns true if a TS2307 diagnostic refers to a module we don't expect to
- * resolve (relative imports, framework deps, app aliases, etc.).
+ * Returns true if a missing-module diagnostic refers to a module we don't
+ * expect to resolve (relative imports, framework deps, app aliases, etc.).
  * Returns false for modules in our paths mapping — those failures are real.
  */
 function isExpectedMissingModule(diagnostic: ts.Diagnostic): boolean {
   const msg = ts.flattenDiagnosticMessageText(diagnostic.messageText, '\n');
-  const match = msg.match(/Cannot find module '([^']+)'/);
+  const match =
+    msg.match(/Cannot find module '([^']+)'/) ??
+    msg.match(
+      /Cannot find module or type declarations for side-effect import of '([^']+)'/
+    );
   if (!match) return false;
   const mod = match[1];
   return !RESOLVED_MODULES.has(mod);
@@ -241,7 +244,7 @@ export function typeCheckBatch(
       (d) =>
         !IGNORED_ERROR_CODES.has(d.code) &&
         !expectedErrorSet.has(d.code) &&
-        !(d.code === 2307 && isExpectedMissingModule(d))
+        !([2307, 2882].includes(d.code) && isExpectedMissingModule(d))
     );
 
     const diagnostics = relevantDiagnostics.map((d) =>

packages/errors/src/index.ts

@@ -392,7 +392,7 @@ export interface RuntimeDecryptionErrorContext {
  */
 export class RuntimeDecryptionError extends WorkflowRuntimeError {
   /** Optional structured context about the failed encrypt/decrypt call. */
-  readonly context?: RuntimeDecryptionErrorContext;
+  declare readonly context?: RuntimeDecryptionErrorContext;
 
   constructor(
     message: string,

packages/errors/tsconfig.json

@@ -1,7 +1,8 @@
 {
   "extends": "@workflow/tsconfig/base.json",
   "compilerOptions": {
-    "outDir": "dist"
+    "outDir": "dist",
+    "rootDir": "./src"
   },
   "include": ["src"],
   "exclude": ["node_modules", "**/*.test.ts"]

packages/next/src/runtime.ts

@@ -1,4 +1,4 @@
 // re-export runtime as stub for resolving to not
 // require @workflow/core be a dependency as well as
 // @workflow/next
-export * from '@workflow/core/dist/runtime';
+export * from '@workflow/core/runtime';

packages/next/tsconfig.json

@@ -2,9 +2,10 @@
   "extends": "@workflow/tsconfig/base.json",
   "compilerOptions": {
     "outDir": "dist",
+    "rootDir": "./src",
     "target": "es2022",
     "module": "commonjs",
-    "moduleResolution": "node"
+    "moduleResolution": "bundler"
   },
   "include": ["src"],
   "exclude": ["node_modules", "**/*.test.ts"]

packages/nitro/tsconfig.json

@@ -2,9 +2,9 @@
   "extends": "@workflow/tsconfig/base.json",
   "compilerOptions": {
     "outDir": "dist",
+    "rootDir": "./src",
     "target": "es2022",
     "module": "preserve",
-    "baseUrl": ".",
     "moduleResolution": "bundler"
   },
   "include": ["src"],

packages/rollup/tsconfig.json

@@ -2,9 +2,9 @@
   "extends": "@workflow/tsconfig/base.json",
   "compilerOptions": {
     "outDir": "dist",
+    "rootDir": "./src",
     "target": "es2022",
     "module": "preserve",
-    "baseUrl": ".",
     "moduleResolution": "bundler"
   },
   "include": ["src"],

packages/serde/tsconfig.json

@@ -1,7 +1,8 @@
 {
   "extends": "@workflow/tsconfig/base.json",
   "compilerOptions": {
-    "outDir": "dist"
+    "outDir": "dist",
+    "rootDir": "./src"
   },
   "include": ["src"],
   "exclude": ["node_modules", "**/*.test.ts"]

packages/sveltekit/tsconfig.json

@@ -2,9 +2,9 @@
   "extends": "@workflow/tsconfig/base.json",
   "compilerOptions": {
     "outDir": "dist",
+    "rootDir": "./src",
     "target": "es2022",
     "module": "preserve",
-    "baseUrl": ".",
     "moduleResolution": "bundler"
   },
   "include": ["src"],

packages/tsconfig/base.json

@@ -16,7 +16,9 @@
     "preserveWatchOutput": true,
     "skipLibCheck": true,
     "module": "node20",
+    "target": "es2023",
     "lib": ["es2022"],
+    "types": ["*"],
     "strict": true
   }
 }

packages/typescript-plugin/tsconfig.json

@@ -4,8 +4,8 @@
     "outDir": "./dist",
     "rootDir": "./src",
     "target": "ES2022",
-    "module": "commonjs",
-    "moduleResolution": "node",
+    "module": "node16",
+    "moduleResolution": "node16",
     "esModuleInterop": true,
     "strict": false,
     "skipLibCheck": true

packages/web-shared/tsconfig.json

@@ -2,6 +2,7 @@
   "extends": "@workflow/tsconfig/base.json",
   "compilerOptions": {
     "outDir": "dist",
+    "rootDir": "./src",
     "target": "es2022",
     "lib": ["es2022", "dom", "dom.iterable", "webworker"],
     "jsx": "react-jsx",

packages/web/app/css.d.ts

@@ -0,0 +1 @@
+declare module '*.css';

packages/web/vite-plugin-node-require.test.ts

@@ -3,6 +3,8 @@ import { build, type Plugin, type Rollup } from 'vite';
 import { describe, expect, test } from 'vitest';
 import { nodeRequireBanner } from './vite-plugin-node-require';
 
+const BUILD_TEST_TIMEOUT_MS = 30_000;
+
 // A virtual entry so the build needs no real files on disk. The body is
 // irrelevant — we only care about the banner the plugin prepends to the chunk.
 function virtualEntry(): Plugin {
@@ -48,22 +50,34 @@ describe('nodeRequireBanner', () => {
   // back to a stub with no `http2.connect`, and every HTTP/2 request (the v4
   // events API + stream writes) breaks — silently degrading observability
   // reads. See vite-plugin-node-require.ts for the full mechanism.
-  test('injects the global-require shim into the SSR server build', async () => {
-    // rollup may re-quote / reflow the banner, so assert on its semantic parts
-    // rather than the exact source string.
-    const code = await buildChunkCode({ ssr: true, withPlugin: true });
-    expect(code).toContain('__wkfCreateRequire');
-    expect(code).toContain('globalThis.require');
-    expect(code).toMatch(/createRequire[\s\S]*from ['"]node:module['"]/);
-  });
+  test(
+    'injects the global-require shim into the SSR server build',
+    async () => {
+      // rollup may re-quote / reflow the banner, so assert on its semantic parts
+      // rather than the exact source string.
+      const code = await buildChunkCode({ ssr: true, withPlugin: true });
+      expect(code).toContain('__wkfCreateRequire');
+      expect(code).toContain('globalThis.require');
+      expect(code).toMatch(/createRequire[\s\S]*from ['"]node:module['"]/);
+    },
+    BUILD_TEST_TIMEOUT_MS
+  );
 
-  test('does not inject the shim into the client/browser build', async () => {
-    const code = await buildChunkCode({ ssr: false, withPlugin: true });
-    expect(code).not.toContain('__wkfCreateRequire');
-  });
+  test(
+    'does not inject the shim into the client/browser build',
+    async () => {
+      const code = await buildChunkCode({ ssr: false, withPlugin: true });
+      expect(code).not.toContain('__wkfCreateRequire');
+    },
+    BUILD_TEST_TIMEOUT_MS
+  );
 
-  test('the SSR build has no shim without the plugin (guards the assertion)', async () => {
-    const code = await buildChunkCode({ ssr: true, withPlugin: false });
-    expect(code).not.toContain('__wkfCreateRequire');
-  });
+  test(
+    'the SSR build has no shim without the plugin (guards the assertion)',
+    async () => {
+      const code = await buildChunkCode({ ssr: true, withPlugin: false });
+      expect(code).not.toContain('__wkfCreateRequire');
+    },
+    BUILD_TEST_TIMEOUT_MS
+  );
 });

packages/workflow/tsconfig.json

@@ -1,7 +1,8 @@
 {
   "extends": "@workflow/tsconfig/base.json",
   "compilerOptions": {
-    "outDir": "dist"
+    "outDir": "dist",
+    "rootDir": "./src"
   },
   "include": ["src"],
   "exclude": ["node_modules", "**/*.test.ts"]

packages/world-local/tsconfig.json

@@ -2,6 +2,7 @@
   "extends": "@workflow/tsconfig/base.json",
   "compilerOptions": {
     "outDir": "dist",
+    "rootDir": "./src",
     "target": "es2022"
   },
   "include": ["src"],

packages/world-postgres/tsconfig.json

@@ -2,7 +2,8 @@
   "extends": "@workflow/tsconfig/base.json",
   "compilerOptions": {
     "moduleResolution": "NodeNext",
-    "outDir": "dist"
+    "outDir": "dist",
+    "rootDir": "./src"
   },
   "include": ["src"],
   "exclude": ["node_modules", "**/*.test.ts"]

packages/world-testing/tsconfig.json

@@ -5,6 +5,7 @@
     "allowJs": true,
     "module": "NodeNext",
     "outDir": "dist",
+    "rootDir": ".",
     "lib": ["ES2024"]
   },
   "include": ["src", ".well-known"],

packages/world-vercel/tsconfig.json

@@ -2,6 +2,7 @@
   "extends": "@workflow/tsconfig/base.json",
   "compilerOptions": {
     "outDir": "dist",
+    "rootDir": "./src",
     "target": "es2022"
   },
   "include": ["src"],

packages/world/tsconfig.json

@@ -1,7 +1,8 @@
 {
   "extends": "@workflow/tsconfig/base.json",
   "compilerOptions": {
-    "outDir": "dist"
+    "outDir": "dist",
+    "rootDir": "./src"
   },
   "include": ["src"],
   "exclude": ["node_modules", "**/*.test.ts"]

pnpm-workspace.yaml

@@ -19,7 +19,7 @@ catalog:
   esbuild: ^0.28.1
   nitro: ^3.0.260429-beta
   semver: 7.7.4
-  typescript: ^5.9.3
+  typescript: ^6.0.3
   ulid: ~3.0.1
   undici: 7.28.0
   vitest: ^4.0.18

workbench/tanstack-start/tsconfig.json

@@ -16,7 +16,6 @@
     "esModuleInterop": true,
     "resolveJsonModule": true,
     "isolatedModules": true,
-    "baseUrl": ".",
     "paths": {
       "@/*": ["./*"],
       "@repo/*": ["../../*"]