Thinking: gate xhigh by model

src/auto-reply/thinking.test.ts

@@ -1,10 +1,34 @@
 import { describe, expect, it } from "vitest";
-import { normalizeReasoningLevel, normalizeThinkLevel } from "./thinking.js";
+import {
+  listThinkingLevels,
+  normalizeReasoningLevel,
+  normalizeThinkLevel,
+} from "./thinking.js";
 
 describe("normalizeThinkLevel", () => {
   it("accepts mid as medium", () => {
     expect(normalizeThinkLevel("mid")).toBe("medium");
   });
+
+  it("accepts xhigh", () => {
+    expect(normalizeThinkLevel("xhigh")).toBe("xhigh");
+  });
+});
+
+describe("listThinkingLevels", () => {
+  it("includes xhigh for codex models", () => {
+    expect(listThinkingLevels(undefined, "gpt-5.2-codex")).toContain("xhigh");
+  });
+
+  it("includes xhigh for openai gpt-5.2", () => {
+    expect(listThinkingLevels("openai", "gpt-5.2")).toContain("xhigh");
+  });
+
+  it("excludes xhigh for non-codex models", () => {
+    expect(listThinkingLevels(undefined, "gpt-4.1-mini")).not.toContain(
+      "xhigh",
+    );
+  });
 });
 
 describe("normalizeReasoningLevel", () => {