Use minimal model in e2e tests

Author: ishulgin

src/__tests__/CodexACPAgent/e2e/acp-e2e-test-utils.ts

@@ -5,7 +5,7 @@ import os from "node:os";
 import path from "node:path";
 import {Readable, Writable} from "node:stream";
 import {describe, expect, vi} from "vitest";
-import {removeDirectoryWithRetry} from "../../acp-test-utils";
+import {removeDirectoryWithRetry, writeCodexHomeConfig} from "../../acp-test-utils";
 
 export const RUN_E2E_TESTS = process.env["RUN_E2E_TESTS"] === "true";
 const DEFAULT_E2E_SUITE_TIMEOUT_MS = 60_000;
@@ -226,7 +226,11 @@ function createTemporaryRuntimePaths(): RuntimePaths {
     fs.mkdirSync(codexHome, {recursive: true});
     fs.mkdirSync(workspaceDir, {recursive: true});
     fs.mkdirSync(appServerLogsDir, {recursive: true});
-    fs.writeFileSync(path.join(codexHome, "config.toml"), 'cli_auth_credentials_store = "file"\n', "utf8");
+    writeCodexHomeConfig(codexHome, {
+        model: "gpt-5.2",
+        model_reasoning_effort: "none",
+        web_search: "disabled",
+    });
 
     return {
         rootDir,

src/__tests__/acp-test-utils.ts

@@ -171,10 +171,21 @@ export function createTestFixture(): TestFixture {
 
 function createTestCodexHome(): string {
     const codexHome = fs.mkdtempSync(path.join(os.tmpdir(), "codex-acp-codex-home-"));
-    fs.writeFileSync(path.join(codexHome, "config.toml"), 'cli_auth_credentials_store = "file"\n', "utf8");
+    writeCodexHomeConfig(codexHome);
     return codexHome;
 }
 
+export function writeCodexHomeConfig(codexHome: string, extras: Record<string, string> = {}): void {
+    const entries: Record<string, string> = {
+        cli_auth_credentials_store: "file",
+        ...extras,
+    };
+    const body = Object.entries(entries)
+        .map(([key, value]) => `${key} = "${value}"`)
+        .join("\n");
+    fs.writeFileSync(path.join(codexHome, "config.toml"), body, "utf8");
+}
+
 export function removeDirectoryWithRetry(directory: string): void {
     for (let attempt = 0; attempt < 5; attempt += 1) {
         try {