Added case for when evaluator does not have any target blocks

blocks/blocks/evaluator.ts

@@ -59,8 +59,17 @@ ${content}
 Criteria:
 ${evaluationCriteria}`
 
-  const targetBlocksInfo = targetBlocks
-    ? `
+  // If no target blocks, just return the evaluation without routing
+  if (!targetBlocks || targetBlocks.length === 0) {
+    return `${basePrompt}
+
+Response Format:
+Return ONLY "end" to indicate no further routing is needed.
+
+Remember: Your response must be ONLY the word "end" - no additional text, formatting, or explanation.`
+  }
+
+  const targetBlocksInfo = `
 Available Destinations:
 ${targetBlocks
   .map(
@@ -79,7 +88,6 @@ ${
     : `- Score greater than or equal to 0.85: Choose success path block
 - Score less than 0.85: Choose failure path block`
 }`
-    : ''
 
   return `${basePrompt}${targetBlocksInfo}
 

executor/index.ts

@@ -720,6 +720,30 @@ export class Executor {
 
     const chosenBlockId = response.content.trim().toLowerCase()
 
+    // Handle case where evaluator has no targets
+    if (chosenBlockId === 'end') {
+      const result = {
+        content: evaluatorConfig.content,
+        model: response.model,
+        tokens: {
+          prompt: response.tokens?.prompt || 0,
+          completion: response.tokens?.completion || 0,
+          total: response.tokens?.total || 0,
+        },
+        selectedPath: {
+          blockId: '',
+          blockType: '',
+          blockTitle: '',
+        },
+      }
+
+      context.blockStates.set(block.id, {
+        response: result,
+      })
+
+      return result
+    }
+
     const chosenBlock = targetBlocks.find((b) => b.id === chosenBlockId)
     if (!chosenBlock) {
       throw new Error(`Invalid evaluation decision: ${chosenBlockId}`)