Add step.sandbox.typescript()

.changeset/sandbox-ts-runner.md

@@ -0,0 +1,13 @@
+---
+"inngest": patch
+---
+
+Experimental: you can now run TypeScript in a sandbox with `step.sandbox.typescript`, available with `sandboxMiddleware()`. `input` keys become variables, a top-level `return` gives the result back, and top-level `await` works. It takes the same `schema.output` as `step.sandbox.python` to validate and type the result. The sandbox image needs Node 22.13 or later.
+
+```ts
+const total = await step.sandbox.typescript(
+  "sum",
+  `return numbers.reduce((a: number, b: number) => a + b, 0)`,
+  { input: { numbers: [1, 2, 3] } },
+);
+```

packages/inngest/package.json

@@ -16,6 +16,7 @@
     "build": "tsc -p tsconfig.build.json && tsdown --config tsdown.config.ts",
     "test": "vitest run",
     "test:integration": "vitest run --config vitest.config.integration.ts",
+    "test:sandbox-live": "pnpm run pb:version && tsx src/components/sandbox/live/run.ts",
     "itest": "tsx scripts/integrationTestRunner.ts",
     "test:examples": "vitest run --dir src/test/functions",
     "test:types": "tsc --noEmit --project tsconfig.types.json",

packages/inngest/src/components/sandbox/middleware.ts

@@ -21,7 +21,10 @@ import {
 } from "./types.ts";
 
 type SandboxStepExtension = {
-  sandbox: DurableSandboxTools & { python: OneShotRunner };
+  sandbox: DurableSandboxTools & {
+    python: OneShotRunner;
+    typescript: OneShotRunner;
+  };
 };
 
 type SandboxGroupExtension = {
@@ -173,6 +176,7 @@ export class SandboxMiddleware extends Middleware.BaseMiddleware {
           sandbox: {
             ...sandbox,
             python: createOneShotRunner(sandbox, "python"),
+            typescript: createOneShotRunner(sandbox, "typescript"),
           },
         },
         group: { ...arg.ctx.group, sandbox: createGroupSandbox(sandbox) },