Sandbox SDK — stable package Isolated Linux environments on Cloudflare Containers, driven from Workers. Prefer the main Sandbox docs and installed stable types over memory. This skill is a gate, a contract, and a retrieval map—not a full manual. This line is the current stable default npm package. The main Sandbox documentation describes it. Existing apps can stay here and keep shipping. We recommend new projects on with . When you can, plan a move with so you are ready when 1.0 becomes the stable release. Do not force that port unless the user asks. 1. Gate — confirm the package line Before…