What problem does it solve? Developers working with Cloudflare Sandbox risk mixing the stable npm package with preview (@next) APIs and container images, producing broken code. This Skill gates the package line, enforces the stable API contract, and routes every task to the correct official documentation page. ## Core Features & Use Cases - Package-line gating: Verifies the npm dependency and container image both match the stable line, and redirects to sandbox-next or sandbox-migrate-to-next when they do not. - Stable API contract: Enforces correct usage of exec, startProcess, execStream, sessions, terminal, and RPC transport while forbidding @next-only APIs like process.output() handles. - Documentation retrieval map: Maps tasks such as files, mounts, backups, ports, tunnels, terminals, and code interpretation to the exact Cloudflare docs page to consult before implementing. - Use Case: A developer maintaining an existing Workers app that runs Python inside a sandbox uses this Skill to confirm the stable package, stream command output with execStream, and clean up deprecated transports per the 2026 deprecation guide. ## Quick Start Ask the assistant to help you run commands and manage files in your existing Cloudflare Sandbox Worker that uses the stable @cloudflare/sandbox package.