What problem does it solve? Cloudflare's Sandbox SDK 1.0 preview (@next) introduces breaking API changes versus the stable package, and mixing package lines or relying on outdated knowledge causes runtime failures. This Skill gates your work on the correct package line, enforces the non-negotiable API contract, and routes you to the right documentation before you write code. ## Core Features & Use Cases - Package-line gate: Verifies the npm dependency and container image both match the @next preview line, and redirects stable apps to sandbox-stable or migrations to sandbox-migrate-to-next. - API contract enforcement: Codifies the new exec/handle model—argv-based exec returning process handles, explicit shells, per-launch cwd/env, no stdin on handles, and correct timeout/kill semantics. - Documentation retrieval map: Maps each task (processes, terminals, interpreter, lifecycle, environment, errors) to the exact preview docs page, with a quick-reference file and examples index. - Use Case: You are building a Worker that runs Python code in an isolated Cloudflare container. The Skill confirms you are on @cloudflare/sandbox@next, shows the minimal getSandbox/exec/output pattern, and points you to the interpreter and errors docs before shipping. ## Quick Start Ask the assistant to build a Cloudflare Worker that executes a Python script inside a sandbox using the @cloudflare/sandbox@next package and return the script's stdout.
