Merge pull request #531 from dgageot/fix-530

Remove redundant Output: prefix

Author: rumpl

examples/gopher.yaml

@@ -73,3 +73,5 @@ agents:
         ref: docker:ast-grep
         config:
           path: .
+    commands:
+      fix-lint: "fix the lint issues"

pkg/tools/builtin/shell.go

@@ -103,8 +103,14 @@ func (h *shellHandler) RunShell(ctx context.Context, toolCall tools.ToolCall) (*
 		}, nil
 	}
 
+	if output == "" {
+		return &tools.ToolCallResult{
+			Output: "<no output>",
+		}, nil
+	}
+
 	return &tools.ToolCallResult{
-		Output: fmt.Sprintf("Output: %s", output),
+		Output: output,
 	}, nil
 }