fix(ultrawork-model-override): set thinking config object instead of variant string

Fixes #2049

src/plugin/ultrawork-model-override.test.ts

@@ -308,7 +308,10 @@ describe("applyUltraworkModelOverrideOnMessage", () => {
     //#then
     expect(output.message.model).toEqual({ providerID: "anthropic", modelID: "claude-opus-4-6" })
     expect(output.message["variant"]).toBe("max")
-    expect(output.message["thinking"]).toBe("max")
+    expect(output.message["thinking"]).toEqual({
+      type: "enabled",
+      budgetTokens: 16000,
+    })
     expect(dbOverrideSpy).not.toHaveBeenCalled()
   })
 
@@ -324,7 +327,10 @@ describe("applyUltraworkModelOverrideOnMessage", () => {
     //#then
     expect(output.message.model).toBeUndefined()
     expect(output.message["variant"]).toBe("high")
-    expect(output.message["thinking"]).toBe("high")
+    expect(output.message["thinking"]).toEqual({
+      type: "enabled",
+      budgetTokens: 16000,
+    })
     expect(dbOverrideSpy).not.toHaveBeenCalled()
   })
 

src/plugin/ultrawork-model-override.ts

@@ -8,6 +8,7 @@ import { scheduleDeferredModelOverride } from "./ultrawork-db-model-override"
 const CODE_BLOCK = /```[\s\S]*?```/g
 const INLINE_CODE = /`[^`]+`/g
 const ULTRAWORK_PATTERN = /\b(ultrawork|ulw)\b/i
+const ULTRAWORK_THINKING_CONFIG = { type: "enabled", budgetTokens: 16000 } as const
 
 export function detectUltrawork(text: string): boolean {
   const clean = text.replace(CODE_BLOCK, "").replace(INLINE_CODE, "")
@@ -117,7 +118,7 @@ export function applyUltraworkModelOverrideOnMessage(
   if (!override.providerID || !override.modelID) {
     if (override.variant) {
       output.message["variant"] = override.variant
-      output.message["thinking"] = override.variant
+      output.message["thinking"] = { ...ULTRAWORK_THINKING_CONFIG }
     }
     return
   }
@@ -134,7 +135,7 @@ export function applyUltraworkModelOverrideOnMessage(
     output.message.model = targetModel
     if (override.variant) {
       output.message["variant"] = override.variant
-      output.message["thinking"] = override.variant
+      output.message["thinking"] = { ...ULTRAWORK_THINKING_CONFIG }
     }
     return
   }