feat(question): support multi-select questions (#7386)

packages/opencode/src/tool/question.ts

@@ -15,7 +15,12 @@ export const QuestionTool = Tool.define("question", {
       tool: ctx.callID ? { messageID: ctx.messageID, callID: ctx.callID } : undefined,
     })
 
-    const formatted = params.questions.map((q, i) => `"${q.question}"="${answers[i] ?? "Unanswered"}"`).join(", ")
+    function format(answer: Question.Answer | undefined) {
+      if (!answer?.length) return "Unanswered"
+      return answer.join(", ")
+    }
+
+    const formatted = params.questions.map((q, i) => `"${q.question}"="${format(answers[i])}"`).join(", ")
 
     return {
       title: `Asked ${params.questions.length} question${params.questions.length > 1 ? "s" : ""}`,

packages/opencode/src/tool/question.txt

@@ -6,4 +6,5 @@ Use this tool when you need to ask the user questions during execution. This all
 
 Usage notes:
 - Users will always be able to select "Other" to provide custom text input
+- Answers are returned as arrays of labels; set `multiple: true` to allow selecting more than one
 - If you recommend a specific option, make that the first option in the list and add "(Recommended)" at the end of the label