sandbox-next SKILL.md skillA
sandbox-next from fcakyon/claude-codex-settings is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add fcakyon/claude-codex-settings/sandbox-next@git:20261028.6b4bcfaPins git:20261028.6b4bcfa in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- fcakyon/claude-codex-settings
- Path
plugins/cloudflare-skills/skills/sandbox-next/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261028.6b4bcfa, committed Oct 28, 2026
- First version recorded
- Sep 8, 2026
- Size
- 6,941 bytes
- Repository stars
- 1,200
- License
- Apache-2.0
Build or maintain Cloudflare Sandbox apps on @cloudflare/sandbox@next (SDK 1.0 preview). Use sandbox-migrate-to-next when porting a stable app.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Sandbox SDK — `@next` (1.0 preview) Isolated Linux environments on [Cloudflare Containers](https://developers.cloudflare.com/containers/index.md), driven from Workers. **Prefer preview docs and installed `@next` types over memory.** APIs change; this skill is a gate, a contract, and a retrieval map—not a full manual. We recommend **new projects** on this line. Apps still on the default package use **`sandbox-stable`**. Port only when asked, via **`sandbox-migrate-to-next`**. ## 1. Gate — confirm the package line Before writing code, inspect the app: | Check | Must match | | ----- | ---------- | | npm dependency | `@cloudflare/sandbox@next` (or another preview tag) | | Container image | Same line (e.g. `cloudflare/sandbox:next`, `next-python`) | | If you find… | Action | | ------------ | ------ | | Default `@cloudflare/sandbox` (no `@next`) | **Stop.** Load **`sandbox-stable`**. Do not apply this skill’s APIs. | | User wants to port stable → `@next` | **Stop.** Load **`sandbox-migrate-to-next`**. | …
Read the whole file at its exact version.
How to install
mdr add fcakyon/claude-codex-settings/sandbox-next@sha256:9c70be360a85d776The line at the top of this page pins the label git:20261028.6b4bcfa, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_qmjxnx37wedsxzzj)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Sep 8, 2026 and Oct 28, 2026, about one every 25 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261028.6b4bcfa latest | 2026-10-28 | 6b4bcfa | 6,941 B | A | view · diff |
| git:20261001.f7836da | 2026-10-01 | f7836da | 6,754 B | A | view · diff |
| git:20260908.4632eb3 | 2026-09-08 | 4632eb3 | 6,836 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6941 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
fcakyon/claude-codex-settings · 1,200 stars · license Apache-2.0 · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_qmjxnx37wedsxzzj GET https://markdownregistry.com/api/v1/resolve?ref=fcakyon/claude-codex-settings/sandbox-next GET https://markdownregistry.com/api/v1/blob/9c70be360a85d7768eb57405af1d0e779dafa943b910173f0196c5be7534c06a
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.