Deno 2.9 introduces Deno Desktop, allowing the creation of native desktop applications using familiar web technologies without Electron. The release simplifies migration from Node.js by enabling deno install to read npm, pnpm, yarn, and Bun lockfiles directly.

Deno Sandbox provides a secure environment for executing LLM-generated code that requires API keys and network access. It addresses the challenges of running untrusted code that interacts with external APIs without human review.