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Support OpenAI-compatible endpoints in Codex harness #234

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Support OpenAI-compatible endpoints in Codex harness #234

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5 changes: 5 additions & 0 deletions src/harness/codex-harness.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -199,6 +199,11 @@ export function codexChildEnv(source: NodeJS.ProcessEnv, jail: string): NodeJS.P
export function prepareCodexHome(source: NodeJS.ProcessEnv, jail: string): string {
const target = join(jail, "codex-home");
mkdirSync(target, { recursive: true });
if (source.OPENAI_BASE_URL) {
writeFileSync(join(target, "config.toml"), `openai_base_url = ${JSON.stringify(source.OPENAI_BASE_URL)}\n`, {
mode: 0o600,
});
}
if (source.OPENAI_API_KEY) {
writeFileSync(
join(target, "auth.json"),
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7 changes: 7 additions & 0 deletions test/codex-harness.test.ts
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Expand Up @@ -304,6 +304,13 @@ test("Codex materializes API-key auth into its isolated home, and never an ambie
assert.equal(existsSync(join(prepareCodexHome({ HOME: homedir() }, bare), "auth.json")), false);
});

test("Codex materializes an OpenAI-compatible endpoint into its isolated home", (t) => {
const jail = mkdtempSync(join(tmpdir(), "qm-codex-endpoint-test-"));
t.after(() => rmSync(jail, { recursive: true, force: true }));
const home = prepareCodexHome({ OPENAI_BASE_URL: "https://proxy.example.com/v1" }, jail);
assert.equal(readFileSync(join(home, "config.toml"), "utf8"), 'openai_base_url = "https://proxy.example.com/v1"\n');
});

test("Codex children cannot use parent surface, control, or terminal tools", () => {
assert.equal(codexChildToolAllowed("history"), true);
assert.equal(codexChildToolAllowed("execute"), true);
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