feat: restore gateway HMR and add WRN formatting

packages/cli/test/create.test.ts

@@ -2,6 +2,7 @@ import { expect, test } from "bun:test";
 import { existsSync, mkdtempSync, readFileSync, rmSync } from "node:fs";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
+import { format } from "prettier";
 import { scaffoldApp } from "../src/create.ts";
 import { currentCliVersion } from "../src/update-notifier.ts";
 
@@ -69,6 +70,15 @@ test("scaffoldApp pins the current framework and exposes llms.txt publicly", ()
     expect(existsSync(join(root, "public", "llms.txt"))).toBe(true);
     expect(existsSync(join(root, "llms.txt"))).toBe(false);
     expect(readFileSync(join(root, ".prettierignore"), "utf8")).toContain("CLAUDE.md");
+    expect(readFileSync(join(root, ".vscode", "settings.json"), "utf8")).toContain(
+      '"editor.formatOnSave": true',
+    );
+    expect(readFileSync(join(root, ".vscode", "settings.json"), "utf8")).toContain(
+      '"editor.defaultFormatter": "wrnexus.wrnexus"',
+    );
+    expect(readFileSync(join(root, ".vscode", "extensions.json"), "utf8")).toContain(
+      "wrnexus.wrnexus",
+    );
     expect(readFileSync(join(root, "app", "pages", "index.wrn"), "utf8")).toContain(
       'href="/api/hello"',
     );
@@ -77,3 +87,34 @@ test("scaffoldApp pins the current framework and exposes llms.txt publicly", ()
     rmSync(parent, { recursive: true, force: true });
   }
 });
+
+test("scaffoldApp emits Prettier-compliant editor and framework files", async () => {
+  const parent = mkdtempSync(join(tmpdir(), "wrnexus-create-"));
+  const root = join(parent, "formatted-app");
+
+  try {
+    scaffoldApp(root, "formatted-app");
+    for (const relative of [
+      "app/styles/global.css",
+      "eslint.config.js",
+      ".vscode/settings.json",
+      ".vscode/extensions.json",
+    ]) {
+      const file = join(root, relative);
+      const source = readFileSync(file, "utf8");
+      const formatted = await format(source, {
+        filepath: file,
+        printWidth: 100,
+        tabWidth: 2,
+        useTabs: false,
+        semi: true,
+        singleQuote: false,
+        trailingComma: "all",
+        endOfLine: "lf",
+      });
+      expect(formatted).toBe(source);
+    }
+  } finally {
+    rmSync(parent, { recursive: true, force: true });
+  }
+});

packages/cli/test/update.test.ts

@@ -61,3 +61,35 @@ test("0.2.18 migration adds helpers to existing apps and is idempotent", () => {
     rmSync(root, { recursive: true, force: true });
   }
 });
+
+test("0.2.19 migration adds VS Code formatting defaults without overwriting settings", () => {
+  const root = mkdtempSync(join(tmpdir(), "wrnexus-update-"));
+  mkdirSync(join(root, "app", "pages"), { recursive: true });
+  mkdirSync(join(root, ".vscode"), { recursive: true });
+  writeFileSync(
+    join(root, "package.json"),
+    JSON.stringify({ name: "editor-app", wrnexus: { version: "0.2.18" } }),
+  );
+  writeFileSync(join(root, ".gitignore"), ".vscode/\n");
+  writeFileSync(join(root, ".prettierignore"), "node_modules/\n");
+  writeFileSync(join(root, ".vscode", "settings.json"), '{"editor.tabSize":4}\n');
+
+  try {
+    updateApp(root, "0.2.19", false);
+    updateApp(root, "0.2.19", false);
+
+    expect(readFileSync(join(root, ".vscode", "settings.json"), "utf8")).toBe(
+      '{"editor.tabSize":4}\n',
+    );
+    expect(readFileSync(join(root, ".vscode", "extensions.json"), "utf8")).toContain(
+      "wrnexus.wrnexus",
+    );
+    expect(readFileSync(join(root, ".prettierignore"), "utf8")).toBe("node_modules/\nCLAUDE.md\n");
+    const gitignore = readFileSync(join(root, ".gitignore"), "utf8");
+    expect(gitignore).not.toContain(".vscode/\n");
+    expect(gitignore).toContain("!.vscode/settings.json");
+    expect(gitignore).toContain("!.vscode/extensions.json");
+  } finally {
+    rmSync(root, { recursive: true, force: true });
+  }
+});