From c5928c211a96a4bd1defe0d9abcc858860842846 Mon Sep 17 00:00:00 2001
From: Tu Shaokun <2801884530@qq.com>
Date: Wed, 10 Dec 2025 15:36:54 +0800
Subject: [PATCH] fix(provider-cursor): include stderr output in error messages

When cursor-agent exits with non-zero code, include the stderr output
in the error message returned to the client. This makes debugging
much easier as users can see the actual error from cursor-agent.

Fixes #59
---
 packages/provider-cursor/src/server.ts | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/packages/provider-cursor/src/server.ts b/packages/provider-cursor/src/server.ts
index 42ec64b2f..a5b5d4513 100644
--- a/packages/provider-cursor/src/server.ts
+++ b/packages/provider-cursor/src/server.ts
@@ -100,6 +100,7 @@ export const createServer = () => {
         requestSignal.addEventListener("abort", killProcess);
 
         let buffer = "";
+        let stderrBuffer = "";
 
         const processLine = async (line: string) => {
           const event = parseStreamLine(line);
@@ -165,7 +166,9 @@ export const createServer = () => {
         });
 
         cursorProcess.stderr.on("data", (chunk: Buffer) => {
-          console.error("[cursor-agent stderr]:", chunk.toString());
+          const text = chunk.toString();
+          stderrBuffer += text;
+          console.error("[cursor-agent stderr]:", text);
         });
 
         cursorProcess.stdin.write(fullPrompt);
@@ -177,7 +180,11 @@ export const createServer = () => {
             if (code === 0 || cursorProcess.killed) {
               resolve();
             } else {
-              reject(new Error(`cursor-agent exited with code ${code}`));
+              const stderrOutput = stderrBuffer.trim();
+              const errorMsg = stderrOutput
+                ? `cursor-agent exited with code ${code}\n${stderrOutput}`
+                : `cursor-agent exited with code ${code}`;
+              reject(new Error(errorMsg));
             }
           });