span output can be object other than an object, like a string

Author: ericallam

packages/cli-v3/src/mcp/formatters.ts

@@ -230,7 +230,7 @@ function formatSpan(
   }
 
   // Show output if it exists
-  if (span.data.output && Object.keys(span.data.output).length > 0) {
+  if (span.data.output) {
     lines.push(
       `${indent}   Output: ${JSON.stringify(span.data.output, null, 2).replace(
         /\n/g,

packages/core/src/v3/schemas/api.ts

@@ -1245,7 +1245,7 @@ export const RetrieveRunTraceSpanSchema = z.object({
     queueName: z.string().optional(),
     machinePreset: z.string().optional(),
     properties: z.record(z.any()).optional(),
-    output: z.record(z.any()).optional(),
+    output: z.unknown().optional(),
   }),
 });