Fix issue where we were passing the model content reflecting terminal line wrapping. (#14566)

packages/core/src/services/shellExecutionService.test.ts

@@ -305,6 +305,24 @@ describe('ShellExecutionService', () => {
       );
     });
 
+    it('should not wrap long lines in the final output', async () => {
+      // Set a small width to force wrapping
+      const narrowConfig = { ...shellExecutionConfig, terminalWidth: 10 };
+      const longString = '123456789012345'; // 15 chars, should wrap at 10
+
+      const { result } = await simulateExecution(
+        'long-line-command',
+        (pty) => {
+          pty.onData.mock.calls[0][0](longString);
+          pty.onExit.mock.calls[0][0]({ exitCode: 0, signal: null });
+        },
+        narrowConfig,
+      );
+
+      expect(result.exitCode).toBe(0);
+      expect(result.output.trim()).toBe(longString);
+    });
+
     it('should not add extra padding but preserve explicit trailing whitespace', async () => {
       const { result } = await simulateExecution('cmd', (pty) => {
         // "value" should not get terminal-width padding

packages/core/src/services/shellExecutionService.ts

@@ -116,8 +116,28 @@ const getFullBufferText = (terminal: pkg.Terminal): string => {
   const lines: string[] = [];
   for (let i = 0; i < buffer.length; i++) {
     const line = buffer.getLine(i);
-    const lineContent = line ? line.translateToString(true) : '';
-    lines.push(lineContent);
+    if (!line) {
+      continue;
+    }
+    // If the NEXT line is wrapped, it means it's a continuation of THIS line.
+    // We should not trim the right side of this line because trailing spaces
+    // might be significant parts of the wrapped content.
+    // If it's not wrapped, we trim normally.
+    let trimRight = true;
+    if (i + 1 < buffer.length) {
+      const nextLine = buffer.getLine(i + 1);
+      if (nextLine?.isWrapped) {
+        trimRight = false;
+      }
+    }
+
+    const lineContent = line.translateToString(trimRight);
+
+    if (line.isWrapped && lines.length > 0) {
+      lines[lines.length - 1] += lineContent;
+    } else {
+      lines.push(lineContent);
+    }
   }
 
   // Remove trailing empty lines