commons-file-resolution SKILL.md skillA
commons-file-resolution from fuzheado/wikipedia-ai-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add fuzheado/wikipedia-ai-skills/commons-file-resolution@git:20261013.f675882Pins git:20261013.f675882 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- fuzheado/wikipedia-ai-skills
- Path
.claude/skills/commons-file-resolution/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261013.f675882, committed Oct 13, 2026
- First version recorded
- Jun 21, 2026
- Size
- 28,158 bytes
- Repository stars
- 27
- License
- MIT
Resolve Wikimedia Commons file references (File:Example.jpg) to browser-usable HTTP URLs — direct origin URLs, thumbnails, Special:FilePath redirects, cache-busting with timestamps, Action API imageinfo queries, and CORS-aware serving patterns for web applications.
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
> ⚠️ **Prefer `Special:FilePath?width=` over computed hash URLs.** Direct `upload.wikimedia.org/wikipedia/commons/{hash}/{file}` URLs can
> return "File not found" for newer Commons uploads (post-2023 storage backend changes).
> The `Special:FilePath` redirect always resolves correctly and supports `?width=` for
> on-the-fly resizing — no MD5 computation, no hash prefix guessing. Only use direct
> hash URLs if you specifically need the origin URL for archival purposes.
> 💡 **Already know which endpoint you need?** See the **Quick Reference** table below. Otherwise, the **SOPs** walk through each approach step by step.
---
## The Problem
Browser applications cannot use `File:Example.jpg` — the wiki page reference — as an image source. They need a real HTTP URL. Wikimedia Commons stores uploaded files at `upload.wikimedia.org` with a hash-based path, but the exact URL depends on the file's upload timestamp, the hash of its name, and whether you want the original or a thumbnail.
This skill covers every method for resolving a `File:` reference to a working URL, from simplest (server-side redirect) to most robust (full Action API query with cache busting).
---
…Read the whole file at its exact version.
How to install
mdr add fuzheado/wikipedia-ai-skills/commons-file-resolution@sha256:1b6de074f5a77e6fThe line at the top of this page pins the label git:20261013.f675882, 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_l377hke33eobgnlq)
0 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jun 21, 2026 and Oct 13, 2026, about one every 57 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261013.f675882 latest | 2026-10-13 | f675882 | 28,158 B | A | view · diff |
| git:20260701.d2b9a8f | 2026-07-01 | d2b9a8f | 22,211 B | A | view · diff |
| git:20260621.129f798 | 2026-06-21 | 129f798 | 21,572 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 (28158 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
fuzheado/wikipedia-ai-skills · 27 stars · license MIT · pushed 2026-11-03 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_l377hke33eobgnlq GET https://markdownregistry.com/api/v1/resolve?ref=fuzheado/wikipedia-ai-skills/commons-file-resolution GET https://markdownregistry.com/api/v1/blob/1b6de074f5a77e6f017ac7628d0d165b5fc44ea3d780a16c7a928636c1838196
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.