Set Up a Modern Addon Environment

Install the toolchain, create the addon in Testsigma, and download the scaffold. The scaffold is a ready-to-build TypeScript project with the SDK already declared as a dependency.

Prerequisites

• Node.js 22 or later is installed.
• pnpm or npm is available.
• Modern addon features are enabled for your Testsigma account.
• You are familiar with TypeScript.

Create the Addon

1. In the left navigation bar, click the Addons icon, then select Addons.
2. Click + New Addon.
3. Select the Modern (TypeScript) runtime.
4. Enter a Name and a Description.
5. Click Create & Proceed.
6. On the addon's detail page, click the Download icon.

What the Scaffold Contains

my-addon/
├── package.json        # build scripts + SDK dependency
├── tsconfig.json
├── tsup.config.ts      # bundler configuration
├── scripts/pack.mjs    # zips the build output for upload
└── src/index.ts        # your code — one named export per capability

Write every capability as a named export in src/index.ts. Default exports and arrays are not supported, and names must be unique within the bundle.

Install Dependencies

pnpm install

To use an npm package, add it with pnpm add and import it. The bundler inlines every dependency, so choose pure JavaScript packages. Native and binary modules do not load.

Next Steps

Pick the capability you want to build, then return to Build, upload, and publish when your code is ready.