Pulumi now supports Bun as a runtime for TypeScript programs, giving you faster startup times and a streamlined developer experience alongside Node.js.

The Pulumi blog provides developers with resources, tutorials, and best practices for infrastructure as code (IaC) and cloud-native development using Pulumi's open-source tools. Developers can learn about deploying and managing infrastructure using familiar programming languages such as JavaScript, TypeScript, Python, and Go. Additionally, the blog covers topics such as cloud architecture patterns, multi-cloud deployments, and serverless computing, enabling developers to build and deploy modern cloud applications with ease.

Pulumi

Pulumi now supports Bun as a fully-fledged runtime for TypeScript programs, not just as a package manager. Setting `runtime: bun` in `Pulumi.yaml` lets Bun execute Pulumi programs directly with no Node.js required, enabling native TypeScript support, faster package installs, and top-level await via ESM. The post covers how to create new Bun-based projects, migrate existing Node.js Pulumi projects (including tsconfig.json updates and ESM migration), and clarifies the difference between using Bun as a runtime vs. as a package manager only. Known limitations include lack of support for callback functions (magic lambdas) and dynamic providers, which still require Node.js. Available in Pulumi 3.227.0.

Introducing Bun as a Runtime for Pulumi

Bun as runtime vs. Bun as package manager