developer-sandbox SKILL.md skillB
developer-sandbox from jonathimer/devmarketing-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jonathimer/devmarketing-skills/developer-sandbox@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jonathimer/devmarketing-skills
- Path
skills/developer-sandbox/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Mar 3, 2026
- Size
- 16,500 bytes
- Repository stars
- 87
- License
- MIT
Design and build interactive playgrounds that let developers experience your product without commitment. This skill covers playground architecture, pre-populated examples, embedding strategies, gating decisions, and converting playground users to signups. Trigger phrases: "developer sandbox", "API playground", "interactive playground", "try it now", "demo environment", "code playground", "live examples", "embedded playground", "developer trial", "sandbox conversion", "playground design".
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
# Interactive Playgrounds and Demo Environments Let developers experience your product before they commit. A great playground removes the biggest barrier to adoption: uncertainty about whether your product solves their problem. ## Overview Developer playgrounds serve multiple purposes: - **Evaluation**: Let developers test before investing setup time - **Learning**: Interactive environment for understanding concepts - **Marketing**: Demonstrate capabilities without sales calls - **Support**: Reproducible environment for debugging issues This skill covers designing playgrounds that convert curious visitors into active users. ## Before You Start Review the **developer-audience-context** skill to understand: - What do developers want to validate before signing up? - What's the typical evaluation workflow in your space? - What competing products offer playgrounds? - What's the minimum viable experience that demonstrates value? Your playground should answer the questions developers have when evaluating. ## Playground Design Principles ### Principle 1: Instant Gratification Developers should see something meaningful within 10 seconds of landing. …
Read the whole file at its exact version.
How to install
mdr add jonathimer/devmarketing-skills/developer-sandbox@sha256:7f032a231bf1a90aThe line at the top of this page pins the label v1.0.0, 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_464dzcf2zsdtwtkv)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Mar 3, 2026.
Audit of the latest version
- fail: No script tag (matched: <script)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (16500 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
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
jonathimer/devmarketing-skills · 87 stars · license MIT · pushed 2026-03-03 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_464dzcf2zsdtwtkv GET https://markdownregistry.com/api/v1/resolve?ref=jonathimer/devmarketing-skills/developer-sandbox GET https://markdownregistry.com/api/v1/blob/7f032a231bf1a90a54870a0062dd5fe07711b2aa39741d9d0267e0d4f0e18788
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.