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CLOUD OPERATIONS / Cloudflare

Cloudflare Sandbox preview migration

Pins Cloudflare's stable-to-preview Sandbox migration, which refuses an unagreed production cutover and forbids invented APIs and live secrets in the sandbox environment.

“Migrate Cloudflare Sandbox apps from stable @cloudflare/sandbox to @cloudflare/sandbox@next (SDK 1.0 preview). Use sandbox-next for apps already on the preview.”

01 / THE REASONING

Why this made the selection.

  • The catalogue has sandbox-stable from this commit and not the migration off that stable package.
  • The file separates this port from new preview work and from day-to-day stable work, and it stops when a user decision is required.

02 / THE REVIEW RECORD

What we actually inspected.

Source review has boundaries.
A clear record is more useful than a “safe” badge.

Material inspected

  • skills/sandbox-migrate-to-next/SKILL.md
  • README.md
  • LICENSE

Our findings

  • The skill says not to force a production cutover without the user agreeing, and that production uses --containers-rollout=immediate because stable and @next protocols are incompatible.
  • It says not to invent gitCheckout, process stdin, or a string-exec completion helper, and that a self-deployed bridge stays on stable.
  • The validation list says no live secrets in the sandbox environment, and the red-flag list repeats that for setEnvVars and launch env.

Not established by this review

  • The resource was not executed and its tools were not called.
  • No package was installed and wrangler deploy was not run.
  • The Cloudflare Sandbox documentation links were not opened.
  • No Worker was typechecked.
  • Not executed: it was not installed or run.

The review applies to the material and revision named here. A newer upstream release can change its behavior.

03 / PUT IT TO WORK

Add a skill to your workflow.

Upstream setup instructions ↗

DOCUMENTED COMMAND

npx skills add cloudflare/skills

Run in your terminal to choose your AI tools, project or global scope, and installation method. This short command follows the current upstream version; the review covers the revision shown above.

Optional: install the reviewed revision

Keeps the original source and installer version where recorded, while leaving your AI tools and installation scope for you to choose.

npx skills add https://github.com/cloudflare/skills
  1. The README's npx skills section is the command above and installs the repository's skills.
  2. The skill table names sandbox-migrate-to-next as the port from stable Sandbox to @cloudflare/sandbox@next.
  3. The same README also shows /plugin install cloudflare@cloudflare, which installs the plugin group.

Before you start

  • A skills-compatible agent
  • An existing stable Sandbox app if the port is performed, which this review did not modify

04 / FOLLOW THE EVIDENCE

The source trail.

Our notes are separate from the original resource.
Check upstream before adopting a new version.

  1. https://github.com/cloudflare/skills/blob/53395984c3ea1925d00fce03b266112302f050e6/skills/sandbox-migrate-to-next/SKILL.md

    Supports: cutover consent, invented-API refusal, and secret red flag

  2. Repository README ↗Checked

    https://github.com/cloudflare/skills/blob/53395984c3ea1925d00fce03b266112302f050e6/README.md

    Supports: npx skills install line and sandbox-migrate-to-next table row

  3. Repository LICENSE ↗Checked

    https://github.com/cloudflare/skills/blob/53395984c3ea1925d00fce03b266112302f050e6/LICENSE

    Supports: Apache License Version 2.0

  4. https://raw.githubusercontent.com/cloudflare/skills/53395984c3ea1925d00fce03b266112302f050e6/skills/sandbox-migrate-to-next/SKILL.md

    Supports: upstreamDescription, review.notTested, review.reviewedAt

  5. https://raw.githubusercontent.com/cloudflare/skills/53395984c3ea1925d00fce03b266112302f050e6/README.md

    Supports: install.command

Evidence & Ask