fix(flow): strip fences from generated JSON values

Author: waleedlatif1

apps/sim/blocks/blocks/flow.ts

@@ -710,6 +710,7 @@ export const FlowBlock: BlockConfig = {
       language: 'json',
       wandConfig: {
         enabled: true,
+        generationType: 'json-value',
         prompt:
           'Generate valid JSON for Flow value: Field value as JSON, matching the data model: string, number, boolean, array, object, or null. Use only supplied category IDs and field keys. Return ONLY one raw JSON value, without markdown fences or prose.',
         placeholder: 'Describe the value to generate',

apps/sim/blocks/types.ts

@@ -183,6 +183,7 @@ export type GenerationType =
   | 'json-schema'
   | 'json-object'
   | 'json-array'
+  | 'json-value'
   | 'table-schema'
   | 'system-prompt'
   | 'custom-tool-schema'

apps/sim/lib/wand/strip-code-fences.ts

@@ -20,6 +20,7 @@ const STRIPS_CODE_FENCES: Record<GenerationType, boolean> = {
   'json-schema': true,
   'json-object': true,
   'json-array': true,
+  'json-value': true,
   'table-schema': true,
   'system-prompt': false,
   'custom-tool-schema': true,