cloudflare-sandbox SKILL.md skillA
cloudflare-sandbox from secondsky/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add secondsky/claude-skills/cloudflare-sandbox@git:20260514.120edd6Pins git:20260514.120edd6 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- secondsky/claude-skills
- Path
plugins/cloudflare-sandbox/skills/cloudflare-sandbox/SKILL.md- Versions recorded
- 4
- Latest version
- git:20260514.120edd6, committed May 14, 2026
- First version recorded
- Dec 24, 2025
- Size
- 18,755 bytes
- Repository stars
- 247
- License
- MIT
Cloudflare Sandboxes SDK for secure code execution in Linux containers at edge. Use for untrusted code, Python/Node.js scripts, AI code interpreters, git operations.
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
# Cloudflare Sandboxes SDK
**Status**: Production Ready (Open Beta)
**Last Updated**: 2025-12-10
**Dependencies**: `cloudflare-worker-base`, `cloudflare-durable-objects` (recommended for understanding)
**Latest Versions**: `@cloudflare/sandbox@0.6.3`, Docker image: `cloudflare/sandbox:0.6.3-python`
**⚠️ BREAKING CHANGE (v0.6.0):** Python is no longer included in the default image. Use `cloudflare/sandbox:<version>-python` for Python support (~1.3GB with data science packages). The lean variant (~600-800MB) excludes Python.
---
## Quick Start (15 Minutes)
### 1. Install SDK and Setup Wrangler
```bash
bun add @cloudflare/sandbox@latest # preferred
# or: bun add @cloudflare/sandbox@latest
```
**wrangler.jsonc:**
```jsonc
{
"name": "my-sandbox-worker",
"main": "src/index.ts",
"compatibility_flags": ["nodejs_compat"],
"containers": [{
"class_name": "Sandbox",
"image": "cloudflare/sandbox:0.6.3-python",
"instance_type": "lite"
}],
"durable_objects": {
"bindings": [{
"class_name": "Sandbox",
"name": "Sandbox"
}]
},
"migrations": [{
"tag": "v1",
"new_sqlite_classes": ["Sandbox"]
}]
}
```
**Why this matters:**
…Read the whole file at its exact version.
How to install
mdr add secondsky/claude-skills/cloudflare-sandbox@sha256:267cd3ec1fd6c964The line at the top of this page pins the label git:20260514.120edd6, 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_kwa6f37bbsp4mseo)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Dec 24, 2025 and May 14, 2026, about one every 47 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260514.120edd6 latest | 2026-05-14 | 120edd6 | 18,755 B | A | view · diff |
| git:20260429.5f7b93b | 2026-04-29 | 5f7b93b | 18,091 B | A | view · diff |
| git:20260426.852a9f7 | 2026-04-26 | 852a9f7 | 17,978 B | A | view · diff |
| git:20251224.ba827ce | 2025-12-24 | ba827ce | 17,971 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 (18755 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
secondsky/claude-skills · 247 stars · license MIT · pushed 2026-10-31 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_kwa6f37bbsp4mseo GET https://markdownregistry.com/api/v1/resolve?ref=secondsky/claude-skills/cloudflare-sandbox GET https://markdownregistry.com/api/v1/blob/267cd3ec1fd6c9641e78a3ed0240244fe6d7b272cd1b1129908bc07ecd107c03
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.