fix: change follow_up type from array to string in ask_followup_question schema

Author: NaccOll

src/core/prompts/tools/schemas/ask-followup-question-schema.ts

@@ -15,20 +15,14 @@ export function generateAskFollowupQuestionSchema(args: ToolArgs): BaseToolSchem
 			},
 			{
 				name: "follow_up",
-				type: "array",
+				type: "string",
 				description: `A list of 2-4 suggested answers that logically follow from the question, ordered by priority or logical sequence. Each suggestion must:
 1. Be provided in its own <suggest> tag
 2. Be specific, actionable, and directly related to the completed task
 3. Be a complete answer to the question - the user should not need to provide additional information or fill in any missing details. DO NOT include placeholders with brackets or parentheses.
 4. Optionally include a mode attribute to switch to a specific mode when the suggestion is selected: <suggest mode="mode-slug">suggestion text</suggest>
    - When using the mode attribute, focus the suggestion text on the action to be taken rather than mentioning the mode switch, as the mode change is handled automatically and indicated by a visual badge`,
 				required: true,
-				items: {
-					name: "suggest",
-					type: "string",
-					description: "A suggested answer for the follow-up question.",
-					required: true,
-				},
 			},
 		],
 		systemPropmt: `## ask_followup_question