fix(provider): widen interleaved reasoning fields (#39556)

Co-authored-by: Aiden Cline <rekram1-node@users.noreply.github.com>

packages/core/src/models-dev.ts

@@ -15,6 +15,11 @@ import { httpClient } from "./effect/app-node-platform"
 export const CatalogModelStatus = Schema.Literals(["alpha", "beta", "deprecated"])
 export type CatalogModelStatus = typeof CatalogModelStatus.Type
 
+const InterleavedField = Schema.Union([
+  Schema.Literals(["reasoning", "reasoning_content", "reasoning_text"]),
+  Schema.String,
+])
+
 const USER_AGENT = `opencode/${InstallationChannel}/${InstallationVersion}/${Flag.OPENCODE_CLIENT}`
 
 const CostTier = Schema.Struct({
@@ -71,9 +76,10 @@ export const Model = Schema.Struct({
   reasoning_options: Schema.optional(Schema.Array(ReasoningOption)),
   interleaved: Schema.optional(
     Schema.Union([
-      Schema.Literal(true),
+      Schema.Boolean,
+      InterleavedField,
       Schema.Struct({
-        field: Schema.Literals(["reasoning", "reasoning_content", "reasoning_details"]),
+        field: InterleavedField,
       }),
     ]),
   ),