Artefact: Playground SKILL.md skillA
Artefact: Playground from jasonwarrenuk/goblin-mode is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jasonwarrenuk/goblin-mode/Artefact: Playground@git:20261008.c2dff9ePins git:20261008.c2dff9e in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jasonwarrenuk/goblin-mode
- Path
skills/artefact-playground/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261008.c2dff9e, committed Oct 8, 2026
- First version recorded
- Aug 16, 2026
- Size
- 4,987 bytes
- Repository stars
- 6
- License
- none declared
Creates interactive HTML playgrounds: self-contained single-file explorers that let users configure something visually through controls, see a live preview and copy out a prompt. Use when the user asks to make a playground, explorer or interactive tool for a topic.
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
# Playground Builder A playground is a self-contained HTML file with interactive controls on one side, a live preview on the other and a prompt output at the bottom with a copy button. The user adjusts controls, explores visually, then copies the generated prompt back into Claude. ## When to use this skill When the user asks for an interactive playground, explorer or visual tool for a topic, especially when the input space is large, visual or structural and hard to express as plain text. ## How to use this skill 1. **Identify the playground type** from the user's request 2. **Load the matching template** from `templates/`: - `templates/design-playground.md`: Visual design decisions (components, layouts, spacing, colour, typography) - `templates/data-explorer.md`: Data and query building (SQL, APIs, pipelines, regex) - `templates/concept-map.md`: Learning and exploration (concept maps, knowledge gaps, scope mapping) - `templates/document-critique.md`: Document review (suggestions with approve/reject/comment workflow) - `templates/diff-review.md`: Code review (git diffs, commits, PRs with line-by-line commenting) …
Read the whole file at its exact version.
How to install
mdr add jasonwarrenuk/goblin-mode/Artefact: Playground@sha256:518620374b0b1e65The line at the top of this page pins the label git:20261008.c2dff9e, 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_dnuwk27bj7jqvpui)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Aug 16, 2026 and Oct 8, 2026, about one every 13 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261008.c2dff9e latest | 2026-10-08 | c2dff9e | 4,987 B | A | view · diff |
| git:20260910.391bea0 | 2026-09-10 | 391bea0 | 4,918 B | A | view · diff |
| git:20260910.d07fb9a | 2026-09-10 | d07fb9a | 4,916 B | A | view · diff |
| git:20260826.9a0f2b5 | 2026-08-26 | 9a0f2b5 | 4,952 B | A | view · diff |
| git:20260816.1f433b8 | 2026-08-16 | 1f433b8 | 4,724 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 (4987 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
jasonwarrenuk/goblin-mode · 6 stars · license none declared · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_dnuwk27bj7jqvpui GET https://markdownregistry.com/api/v1/resolve?ref=jasonwarrenuk/goblin-mode/Artefact: Playground GET https://markdownregistry.com/api/v1/blob/518620374b0b1e6586cedc7c73703053ec148563930d5a608ab3b9d932571563
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.