chore: upgrade TypeScript to 7.0.2

.chronus/changes/upgrade-typescript-7-2026-7-15.md

@@ -0,0 +1,9 @@
+---
+changeKind: dependencies
+packages:
+  - "@typespec/compiler"
+  - "typespec-vscode"
+  - "@typespec/http-client-python"
+---
+
+Upgrade TypeScript to 7.0.2

.chronus/changes/upgrade-typescript-7-preview-2026-7-15.md

@@ -0,0 +1,9 @@
+---
+changeKind: dependencies
+packages:
+  - "@typespec/html-program-viewer"
+  - "@typespec/playground"
+  - "@typespec/http-server-js"
+---
+
+Upgrade TypeScript to 7.0.2

packages/compiler/src/server/server.ts

@@ -144,11 +144,11 @@ function main() {
   connection.workspace.onDidRenameFiles(profile(s.renameFiles));
 
   const validateInitProjectTemplate: CustomRequestName = "typespec/validateInitProjectTemplate";
-  connection.onRequest(validateInitProjectTemplate, profile(s.validateInitProjectTemplate));
+  connection.onRequest<boolean, unknown>(validateInitProjectTemplate, profile(s.validateInitProjectTemplate));
   const getInitProjectContextRequestName: CustomRequestName = "typespec/getInitProjectContext";
   connection.onRequest(getInitProjectContextRequestName, profile(s.getInitProjectContext));
   const initProjectRequestName: CustomRequestName = "typespec/initProject";
-  connection.onRequest(initProjectRequestName, profile(s.initProject));
+  connection.onRequest<boolean, unknown>(initProjectRequestName, profile(s.initProject));
   const compileProjectRequestName: CustomRequestName = "typespec/internalCompile";
   connection.onRequest(compileProjectRequestName, profile(s.internalCompile));
 

packages/html-program-viewer/package.json

@@ -75,6 +75,7 @@
     "typescript": "catalog:",
     "vite": "catalog:",
     "vite-plugin-checker": "catalog:",
+    "@typescript/typescript6": "catalog:",
     "vite-plugin-dts": "catalog:",
     "vitest": "catalog:"
   }

packages/http-client-csharp/package.json

@@ -92,7 +92,7 @@
     "@vitest/ui": "^4.1.8",
     "c8": "^10.1.2",
     "rimraf": "~6.0.1",
-    "typescript": "~5.8.2",
+    "typescript": "~7.0.2",
     "vitest": "^4.1.8"
   },
   "dependencies": {

packages/http-client-python/package.json

@@ -126,7 +126,7 @@
     "c8": "^10.1.3",
     "picocolors": "~1.1.1",
     "rimraf": "~6.1.2",
-    "typescript": "~5.9.2",
+    "typescript": "~7.0.2",
     "typescript-eslint": "^8.49.0",
     "vitest": "^4.0.15"
   }

packages/http-server-js/generated-defs/package.json.ts

@@ -28,7 +28,7 @@ export const hsjsDependencies: Record<string, string> = {
   "swagger-ui-express": "^5.0.1",
   "temporal-polyfill": "^1.0.1",
   "tsx": "^4.21.0",
-  "typescript": "~6.0.2",
+  "typescript": "~7.0.2",
   "vitest": "^4.1.3",
   "yargs": "^18.0.0",
   "prettier": "^3.8.1",

packages/playground-website/package.json

@@ -92,6 +92,7 @@
     "rollup-plugin-visualizer": "catalog:",
     "typescript": "catalog:",
     "vite": "catalog:",
+    "@typescript/typescript6": "catalog:",
     "vite-plugin-dts": "catalog:",
     "vitest": "catalog:"
   }

packages/playground/package.json

@@ -118,6 +118,7 @@
     "typescript": "catalog:",
     "vite": "catalog:",
     "vite-plugin-checker": "catalog:",
+    "@typescript/typescript6": "catalog:",
     "vite-plugin-dts": "catalog:",
     "vitest": "catalog:"
   }

packages/react-components/package.json

@@ -64,6 +64,7 @@
     "typescript": "catalog:",
     "vite": "catalog:",
     "vite-plugin-checker": "catalog:",
+    "@typescript/typescript6": "catalog:",
     "vite-plugin-dts": "catalog:",
     "vitest": "catalog:"
   }

packages/spec-dashboard/package.json

@@ -52,6 +52,7 @@
     "typescript": "catalog:",
     "vite": "catalog:",
     "vite-plugin-checker": "catalog:",
+    "@typescript/typescript6": "catalog:",
     "vite-plugin-dts": "catalog:"
   }
 }

packages/typespec-vscode/src/tsp-language-client.ts

@@ -310,7 +310,7 @@ export class TspLanguageClient {
 
     const sendLmChatRequestRequestName: LspClientCustomRequest_ChatComplete_Name =
       "custom/chatCompletion";
-    lc.onRequest(
+    lc.onRequest<string | undefined, unknown>(
       sendLmChatRequestRequestName,
       (params: LspClientCustomRequest_ChatCompletion_Params) =>
         sendLmChatRequest(params.messages, params.modelFamily, params.options, params.id),

patches/@alloy-js__cli@0.24.0.patch

@@ -0,0 +1,24 @@
+diff --git a/dist/commands/build.js b/dist/commands/build.js
+index 53ad172a1517ce32c8a5ade930441957720da8c8..bde87caea343c53ae55b89362d246d7fa17b3836 100644
+--- a/dist/commands/build.js
++++ b/dist/commands/build.js
+@@ -1,7 +1,7 @@
+ import { parseArgs } from "node:util";
+ import { join } from "pathe";
+ import pc from "picocolors";
+-import ts from "typescript";
++import ts from "@typescript/typescript6";
+ import { buildAllFiles } from "../babel.js";
+ import { getParseCommandLine } from "../typescript.js";
+ const formatHost = {
+diff --git a/dist/typescript.js b/dist/typescript.js
+index 9a80f974c992e3bb735253770c5269c9567945b0..ed6409b571bfa8d2aa1f1373e5e0a5fa8674555d 100644
+--- a/dist/typescript.js
++++ b/dist/typescript.js
+@@ -1,5 +1,5 @@
+ import { dirname, join } from "pathe";
+-import * as ts from "typescript";
++import * as ts from "@typescript/typescript6";
+ export function getParseCommandLine() {
+     const configPath = findTSConfigFile();
+     const opts = ts.getParsedCommandLineOfConfigFile(configPath, { skipLibCheck: true }, {

patches/@astrojs__check@0.9.9.patch

@@ -0,0 +1,13 @@
+diff --git a/dist/index.js b/dist/index.js
+index 03cac8a2130e8da60e0bb1588fcbea7c58b86f43..12a099ba1887279d46971c097716c9bfcaa453b7 100644
+--- a/dist/index.js
++++ b/dist/index.js
+@@ -18,7 +18,7 @@ export function parseArgsAsCheckConfig(args) {
+ export async function check(flags) {
+     const workspaceRoot = path.resolve(flags.root ?? process.cwd());
+     const require = createRequire(import.meta.url);
+-    const checker = new AstroCheck(workspaceRoot, require.resolve('typescript'), flags.tsconfig);
++    const checker = new AstroCheck(workspaceRoot, require.resolve('@typescript/typescript6'), flags.tsconfig);
+     let req = 0;
+     if (flags.watch) {
+         function createWatcher(rootPath, extensions) {

patches/@astrojs__language-server@2.16.10.patch

@@ -0,0 +1,13 @@
+diff --git a/dist/check.js b/dist/check.js
+index 1d1e33896a0e55251d167132f4f5943eb48103f3..e88063e87095b78d16a48b895965f77d6daa198a 100644
+--- a/dist/check.js
++++ b/dist/check.js
+@@ -118,7 +118,7 @@ class AstroCheck {
+         return result;
+     }
+     initialize() {
+-        this.ts = this.typescriptPath ? require(this.typescriptPath) : require('typescript');
++        this.ts = this.typescriptPath ? require(this.typescriptPath) : require('@typescript/typescript6');
+         const tsconfigPath = this.getTsconfig();
+         const languagePlugins = [
+             (0, index_js_1.getAstroLanguagePlugin)(),