fix: enforce Node.js 20.18.3+ to resolve CSS URL scheme issues

- Add engines field to package.json requiring Node.js >=20.18.3
- Node.js 20.18.3 includes fix for URL scheme handling (nodejs/node#55471)
- Resolves "The URL must be of scheme file" errors in CSS compilation
- Add improved JSON parsing error handling in message API endpoint

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: obra

package.json

@@ -3,6 +3,9 @@
   "version": "0.0.1",
   "type": "module",
   "author": "Jesse Vincent <[email protected]>",
+  "engines": {
+    "node": ">=20.18.3"
+  },
   "bin": {
     "lace": "./dist/cli.js",
     "debug-thread": "./dist/debug-thread.js"

packages/web/app/api/threads/[threadId]/message/route.ts

@@ -42,7 +42,16 @@ export async function POST(
     const threadId: ThreadId = asThreadId(threadIdResult.data);
 
     // Parse and validate request body with Zod
-    const bodyRaw: unknown = await request.json();
+    let bodyRaw: unknown;
+    try {
+      bodyRaw = await request.json();
+    } catch (error) {
+      const errorResponse: ApiErrorResponse = {
+        error: 'Invalid JSON in request body',
+      };
+      return NextResponse.json(errorResponse, { status: 400 });
+    }
+
     const bodyResult = MessageRequestSchema.safeParse(bodyRaw);
 
     if (!bodyResult.success) {

packages/web/package.json

@@ -3,6 +3,9 @@
   "version": "0.0.1",
   "private": true,
   "type": "module",
+  "engines": {
+    "node": ">=20.18.3"
+  },
   "scripts": {
     "dev": "tsx watch server.ts",
     "build": "next build",