Support NDJSON input and stub MCP resource lists

.codex/mcp_996_gui_proxy.js

@@ -68,9 +68,12 @@ const tools = [
 ];
 
 let input = Buffer.alloc(0);
+let responseMode = "lsp";
 
 process.stdin.on("data", (chunk) => {
   log(`stdin bytes=${chunk.length}`);
+  log(`stdin utf8=${JSON.stringify(chunk.toString("utf8"))}`);
+  log(`stdin hex=${chunk.toString("hex")}`);
   input = Buffer.concat([input, chunk]);
   readMessages();
 });
@@ -80,6 +83,33 @@ process.on("uncaughtException", (error) => log(`uncaught ${error.stack || error.
 
 function readMessages() {
   while (true) {
+    let firstNonWhitespace = 0;
+    while (
+      firstNonWhitespace < input.length &&
+      [9, 10, 13, 32].includes(input[firstNonWhitespace])
+    ) {
+      firstNonWhitespace += 1;
+    }
+    if (firstNonWhitespace > 0) input = input.slice(firstNonWhitespace);
+    if (input.length === 0) return;
+
+    if (input[0] === 123) {
+      responseMode = "ndjson";
+      const lineEnd = input.indexOf("\n");
+      if (lineEnd < 0) return;
+      const body = input.slice(0, lineEnd).toString("utf8").trim();
+      input = input.slice(lineEnd + 1);
+      if (!body) continue;
+      log(`message ${body}`);
+      handle(JSON.parse(body)).catch((error) => {
+        respond(JSON.parse(body).id, null, {
+          code: -32603,
+          message: error && error.message ? error.message : String(error),
+        });
+      });
+      continue;
+    }
+
     let headerEnd = input.indexOf("\r\n\r\n");
     let separatorLength = 4;
     if (headerEnd < 0) {
@@ -131,6 +161,21 @@ async function handle(message) {
     return;
   }
 
+  if (message.method === "resources/list") {
+    respond(message.id, { resources: [] });
+    return;
+  }
+
+  if (message.method === "resources/templates/list") {
+    respond(message.id, { resourceTemplates: [] });
+    return;
+  }
+
+  if (message.method === "prompts/list") {
+    respond(message.id, { prompts: [] });
+    return;
+  }
+
   if (message.method === "tools/call") {
     const name = message.params?.name;
     const args = message.params?.arguments || {};
@@ -210,5 +255,9 @@ function respond(id, result, error) {
     : { jsonrpc: "2.0", id, result };
   const body = JSON.stringify(payload);
   log(`respond id=${id} bytes=${Buffer.byteLength(body, "utf8")} error=${Boolean(error)}`);
-  process.stdout.write(`Content-Length: ${Buffer.byteLength(body, "utf8")}\r\n\r\n${body}`);
+  if (responseMode === "ndjson") {
+    process.stdout.write(`${body}\n`);
+  } else {
+    process.stdout.write(`Content-Length: ${Buffer.byteLength(body, "utf8")}\r\n\r\n${body}`);
+  }
 }