feat(elicitation): text-only responses become follow-up questions

When agent responds with text only (no tool calls), return as
elicitation instead of forcing submit_answer. Enables multi-turn
conversation where agent asks for missing info before acting.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: a6b8

src/agent/AgentLoop.ts

@@ -151,6 +151,32 @@ class AgentLoop {
                 .some( ( block: any ) => block.type === 'tool_use' )
 
             if( !hasToolUse || round > maxRounds ) {
+                const textBlocks = content
+                    .filter( ( block: any ) => block.type === 'text' )
+                    .map( ( block: any ) => block.text )
+
+                const finalText = textBlocks.join( '\n' )
+
+                if( toolCallLog.length === 0 && !hasRequestedSubmit && round <= maxRounds ) {
+                    const duration = Date.now() - startTime
+
+                    if( onRoundLog ) { onRoundLog( roundLog ) }
+
+                    const result = {
+                        status: 'elicitation',
+                        query,
+                        result: { text: finalText },
+                        costs: { inputTokens: totalInputTokens, outputTokens: totalOutputTokens },
+                        metadata: { model, toolCalls: 0, llmRounds: round, duration }
+                    }
+
+                    running = false
+
+                    if( onStatus ) { onStatus( { status: 'completed', round, message: 'Agent needs more info (elicitation)' } ) }
+
+                    return { result }
+                }
+
                 if( !hasRequestedSubmit && toolCallLog.length > 0 && round <= maxRounds ) {
                     hasRequestedSubmit = true
                     messages.push( { role: 'assistant', content } )
@@ -164,11 +190,6 @@ class AgentLoop {
                     continue
                 }
 
-                const textBlocks = content
-                    .filter( ( block: any ) => block.type === 'text' )
-                    .map( ( block: any ) => block.text )
-
-                const finalText = textBlocks.join( '\n' )
                 const duration = Date.now() - startTime
 
                 const result = AgentLoop

tests/unit/AgentLoop.test.ts

@@ -66,12 +66,10 @@ describe( 'AgentLoop', () => {
                 maxTokens: 1024
             } )
 
-        expect( result.status ).toBe( 'success' )
+        expect( result.status ).toBe( 'elicitation' )
         expect( result.query ).toBe( 'What should I buy?' )
         expect( result.metadata.llmRounds ).toBe( 1 )
         expect( result.metadata.toolCalls ).toBe( 0 )
-        expect( result.costs.breakdown ).toHaveLength( 1 )
-        expect( result.costs.breakdown[ 0 ].type ).toBe( 'llm' )
     } )
 
 
@@ -324,7 +322,8 @@ describe( 'AgentLoop', () => {
                 maxTokens: 1024
             } )
 
-        expect( result.result ).toEqual( { key: 'value' } )
+        expect( result.status ).toBe( 'elicitation' )
+        expect( result.result ).toEqual( { text: 'Here is the result:\n```json\n{"key": "value"}\n```' } )
     } )