feat: unify JSON value schema DSL

packages/ui/tool-ask-user/src/index.ts

@@ -27,6 +27,7 @@ export function apply(ctx: Context): void {
         description: 'Questions to ask the user before continuing.',
         items: {
           type: 'object',
+          additionalProperties: true,
           properties: {
             id: { type: 'string', required: true, description: 'Stable id for this question; echoed in the answer.' },
             question: { type: 'string', required: true, description: 'The specific question to ask the user.' },
@@ -39,6 +40,7 @@ export function apply(ctx: Context): void {
               description: 'Optional choices to show the user. If you recommend one, put it first and append "(Recommended)" to that label.',
               items: {
                 type: 'object',
+                additionalProperties: true,
                 properties: {
                   label: { type: 'string', required: true, description: 'Short user-facing option label.' },
                   description: { type: 'string', description: 'One sentence explaining the tradeoff or impact.' },