Add executable detection and export Codex from the SDK (#4532)

Executable detection uses the same rules as the codex wrapper.

sdk/typescript/jest.config.cjs

@@ -3,14 +3,29 @@ module.exports = {
   preset: "ts-jest/presets/default-esm",
   testEnvironment: "node",
   extensionsToTreatAsEsm: [".ts"],
-  globals: {
-    "ts-jest": {
-      useESM: true,
-      tsconfig: "tsconfig.json",
-    },
-  },
   moduleNameMapper: {
     "^(\\.{1,2}/.*)\\.js$": "$1",
   },
   testMatch: ["**/tests/**/*.test.ts"],
+  transform: {
+    "^.+\\.tsx?$": [
+      "ts-jest",
+      {
+        useESM: true,
+        tsconfig: "tsconfig.json",
+        diagnostics: {
+          ignoreCodes: [1343],
+        },
+        astTransformers: {
+          before: [
+            {
+              path: "ts-jest-mock-import-meta",
+              // Workaround for meta.url not working in jest
+              options: { metaObjectReplacement: { url: "file://" + __dirname + "/dist/index.js" } },
+            },
+          ],
+        },
+      },
+    ],
+  },
 };

sdk/typescript/package.json

@@ -42,15 +42,16 @@
   "devDependencies": {
     "@types/jest": "^29.5.14",
     "@types/node": "^20.19.18",
-    "typescript-eslint": "^8.45.0",
     "eslint": "^9.36.0",
     "eslint-config-prettier": "^9.1.2",
+    "eslint-plugin-jest": "^29.0.1",
     "jest": "^29.7.0",
     "prettier": "^3.6.2",
     "ts-jest": "^29.3.4",
     "ts-node": "^10.9.2",
     "tsup": "^8.5.0",
     "typescript": "^5.9.2",
-    "eslint-plugin-jest": "^29.0.1"
+    "typescript-eslint": "^8.45.0",
+    "ts-jest-mock-import-meta": "^1.3.1"
   }
 }

sdk/typescript/src/codex.ts

@@ -7,11 +7,7 @@ export class Codex {
   private options: CodexOptions;
 
   constructor(options: CodexOptions) {
-    if (!options.executablePath) {
-      throw new Error("executablePath is required");
-    }
-
-    this.exec = new CodexExec(options.executablePath);
+    this.exec = new CodexExec(options.codexPathOverride);
     this.options = options;
   }
 

sdk/typescript/src/codexOptions.ts

@@ -1,7 +1,5 @@
 export type CodexOptions = {
-  // TODO: remove
-  executablePath: string;
-  // TODO: remove
+  codexPathOverride?: string;
   baseUrl?: string;
   apiKey?: string;
 };

sdk/typescript/src/exec.ts

@@ -1,7 +1,10 @@
 import { spawn } from "child_process";
+
 import readline from "node:readline";
 
 import { SandboxMode } from "./turnOptions";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
 
 export type CodexExecArgs = {
   input: string;
@@ -15,8 +18,8 @@ export type CodexExecArgs = {
 
 export class CodexExec {
   private executablePath: string;
-  constructor(executablePath: string) {
-    this.executablePath = executablePath;
+  constructor(executablePath: string | null = null) {
+    this.executablePath = executablePath || findCodexPath();
   }
 
   async *run(args: CodexExecArgs): AsyncGenerator<string> {
@@ -92,3 +95,64 @@ export class CodexExec {
     }
   }
 }
+
+const scriptFileName = fileURLToPath(import.meta.url);
+const scriptDirName = path.dirname(scriptFileName);
+
+function findCodexPath() {
+  const { platform, arch } = process;
+
+  let targetTriple = null;
+  switch (platform) {
+    case "linux":
+    case "android":
+      switch (arch) {
+        case "x64":
+          targetTriple = "x86_64-unknown-linux-musl";
+          break;
+        case "arm64":
+          targetTriple = "aarch64-unknown-linux-musl";
+          break;
+        default:
+          break;
+      }
+      break;
+    case "darwin":
+      switch (arch) {
+        case "x64":
+          targetTriple = "x86_64-apple-darwin";
+          break;
+        case "arm64":
+          targetTriple = "aarch64-apple-darwin";
+          break;
+        default:
+          break;
+      }
+      break;
+    case "win32":
+      switch (arch) {
+        case "x64":
+          targetTriple = "x86_64-pc-windows-msvc";
+          break;
+        case "arm64":
+          targetTriple = "aarch64-pc-windows-msvc";
+          break;
+        default:
+          break;
+      }
+      break;
+    default:
+      break;
+  }
+
+  if (!targetTriple) {
+    throw new Error(`Unsupported platform: ${platform} (${arch})`);
+  }
+
+  const vendorRoot = path.join(scriptDirName, "..", "vendor");
+  const archRoot = path.join(vendorRoot, targetTriple);
+  const codexBinaryName = process.platform === "win32" ? "codex.exe" : "codex";
+  const binaryPath = path.join(archRoot, "codex", codexBinaryName);
+
+  return binaryPath;
+}

sdk/typescript/src/index.ts

@@ -22,9 +22,9 @@ export type {
   ErrorItem,
 } from "./items";
 
-export type { Thread, RunResult, RunStreamedResult, Input } from "./thread";
+export { Thread, RunResult, RunStreamedResult, Input } from "./thread";
 
-export type { Codex } from "./codex";
+export { Codex } from "./codex";
 
 export type { CodexOptions } from "./codexOptions";
 

sdk/typescript/tests/run.test.ts

@@ -23,7 +23,7 @@ describe("Codex", () => {
     });
 
     try {
-      const client = new Codex({ executablePath: codexExecPath, baseUrl: url, apiKey: "test" });
+      const client = new Codex({ codexPathOverride: codexExecPath, baseUrl: url, apiKey: "test" });
 
       const thread = client.startThread();
       const result = await thread.run("Hello, world!");
@@ -60,7 +60,7 @@ describe("Codex", () => {
     });
 
     try {
-      const client = new Codex({ executablePath: codexExecPath, baseUrl: url, apiKey: "test" });
+      const client = new Codex({ codexPathOverride: codexExecPath, baseUrl: url, apiKey: "test" });
 
       const thread = client.startThread();
       await thread.run("first input");
@@ -103,7 +103,7 @@ describe("Codex", () => {
     });
 
     try {
-      const client = new Codex({ executablePath: codexExecPath, baseUrl: url, apiKey: "test" });
+      const client = new Codex({ codexPathOverride: codexExecPath, baseUrl: url, apiKey: "test" });
 
       const thread = client.startThread();
       await thread.run("first input");
@@ -149,7 +149,7 @@ describe("Codex", () => {
     });
 
     try {
-      const client = new Codex({ executablePath: codexExecPath, baseUrl: url, apiKey: "test" });
+      const client = new Codex({ codexPathOverride: codexExecPath, baseUrl: url, apiKey: "test" });
 
       const originalThread = client.startThread();
       await originalThread.run("first input");
@@ -193,7 +193,7 @@ describe("Codex", () => {
     const { args: spawnArgs, restore } = codexExecSpy();
 
     try {
-      const client = new Codex({ executablePath: codexExecPath, baseUrl: url, apiKey: "test" });
+      const client = new Codex({ codexPathOverride: codexExecPath, baseUrl: url, apiKey: "test" });
 
       const thread = client.startThread();
       await thread.run("apply options", {

sdk/typescript/tests/runStreamed.test.ts

@@ -23,7 +23,7 @@ describe("Codex", () => {
     });
 
     try {
-      const client = new Codex({ executablePath: codexExecPath, baseUrl: url, apiKey: "test" });
+      const client = new Codex({ codexPathOverride: codexExecPath, baseUrl: url, apiKey: "test" });
 
       const thread = client.startThread();
       const result = await thread.runStreamed("Hello, world!");
@@ -82,7 +82,7 @@ describe("Codex", () => {
     });
 
     try {
-      const client = new Codex({ executablePath: codexExecPath, baseUrl: url, apiKey: "test" });
+      const client = new Codex({ codexPathOverride: codexExecPath, baseUrl: url, apiKey: "test" });
 
       const thread = client.startThread();
       const first = await thread.runStreamed("first input");
@@ -128,7 +128,7 @@ describe("Codex", () => {
     });
 
     try {
-      const client = new Codex({ executablePath: codexExecPath, baseUrl: url, apiKey: "test" });
+      const client = new Codex({ codexPathOverride: codexExecPath, baseUrl: url, apiKey: "test" });
 
       const originalThread = client.startThread();
       const first = await originalThread.runStreamed("first input");

sdk/typescript/tsconfig.json

@@ -16,7 +16,8 @@
     "declaration": true,
     "declarationMap": true,
     "noImplicitAny": true,
-    "outDir": "dist"
+    "outDir": "dist",
+    "stripInternal": true
   },
   "include": ["src", "tests", "tsup.config.ts"],
   "exclude": ["dist", "node_modules"]