zebbern/claude-code-guide · skills/r2-upload/SKILL.md

r2-upload skillA

r2-upload is agent-read markdown (skill) from zebbern/claude-code-guide: Upload files to Cloudflare R2, AWS S3, or any S3-compatible storage (like MinIO) and generate secure, time-limited presigned download links with configurable expiration, typically set to 5 minutes. Use when the user needs to upload a file to cloud storage and get a shareable link, or mentions R2, S3, presigned URLs, temporary links, or file uploads with expiration..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add zebbern/claude-code-guide/r2-upload@git:20260531.164971d
Exact content
mdr add zebbern/claude-code-guide/r2-upload@sha256:1a3649c2742caa2a

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_rk5qf7ukvmwozugv.svg)](https://markdownregistry.com/a/art_rk5qf7ukvmwozugv)

0 badge views in 30 days

Versions

versioncommittedcommitsizeaudit
git:20260531.164971d latest2026-05-31 164971d 3,546 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (3546 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

GitHub

zebbern/claude-code-guide · 4,627 stars · license MIT · pushed 2026-09-18 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_rk5qf7ukvmwozugv
GET https://markdownregistry.com/api/v1/resolve?ref=zebbern/claude-code-guide/r2-upload
GET https://markdownregistry.com/api/v1/blob/1a3649c2742caa2a10fd63caa18d9a89f545a1edb4ae55870cb72cbb25274fd1

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.