fix E2E tests

src/__tests__/CodexACPAgent/e2e/acp-e2e-models-availability.test.ts

@@ -2,8 +2,6 @@ import {afterEach, beforeEach, expect, it} from "vitest";
 import {createAuthenticatedFixture, describeE2E, type SpawnedAgentFixture,} from "./acp-e2e-test-utils";
 import {ModelId} from "../../../ModelId";
 
-const DEFAULT_MODEL_ID = ModelId.create("gpt-5.4-mini", "medium")
-
 describeE2E("Models availability", () => {
     let fixture: SpawnedAgentFixture;
 
@@ -17,7 +15,22 @@ describeE2E("Models availability", () => {
 
     it(`default model is available`, async () => {
         const session = await fixture.createSession();
-        const models = session.models?.availableModels?.map(m => m.modelId);
-        expect(models).toContain(DEFAULT_MODEL_ID.toString())
+        const models = session.models;
+        const availableModelIds = models?.availableModels?.map(m => m.modelId) ?? [];
+        expect(availableModelIds.length).toBeGreaterThan(0);
+
+        // Codex's advertised catalog changes as it is upgraded, so assert the
+        // invariant that survives those bumps instead of pinning a specific
+        // model id: the session's current (default) model must be one of the
+        // advertised models. Compare on the base model id because
+        // availableModels enumerate model x reasoning-effort pairs while the
+        // current model may carry an effort (e.g. "none") that is not itself
+        // enumerated.
+        const currentModelId = models?.currentModelId;
+        expect(currentModelId).toBeDefined();
+
+        const currentBaseModel = ModelId.fromString(currentModelId!).model;
+        const availableBaseModels = availableModelIds.map(id => ModelId.fromString(id).model);
+        expect(availableBaseModels).toContain(currentBaseModel);
     });
 });

src/__tests__/CodexACPAgent/e2e/spawned-agent-fixture.ts

@@ -10,7 +10,7 @@ import type {PermissionResponder} from "./permission-responders";
 import type {LegacyNewSessionResponse} from "../../../AcpExtensions";
 
 export const DEFAULT_TEST_MODEL_ID = ModelId.create("gpt-5.2", "none");
-export const OTHER_TEST_MODEL_ID = ModelId.create("gpt-5.4-mini", "low");
+export const OTHER_TEST_MODEL_ID = ModelId.create("gpt-5.5", "low");
 
 export interface TestSkill {
     readonly name: string;