sigistry/marketplace · plugins/llm-app-hardener/skills/prompt-versioning-hygiene/SKILL.md

prompt-versioning-hygiene skillA

prompt-versioning-hygiene is agent-read markdown (skill) from sigistry/marketplace: This skill should be used when the user mentions "prompt engineering", "prompt versioning", "prompt management", "system prompt", "prompt template", "manage prompts", or "prompts scattered in code". It provides a methodology for treating prompts as versioned, reviewable, testable code rather than magic strings buried in application logic..

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 sigistry/marketplace/prompt-versioning-hygiene@git:20260826.571bc2f
Exact content
mdr add sigistry/marketplace/prompt-versioning-hygiene@sha256:204b8746dd5c458f

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_f43uimxk47tgqzzf.svg)](https://markdownregistry.com/a/art_f43uimxk47tgqzzf)

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Versions

versioncommittedcommitsizeaudit
git:20260826.571bc2f latest2026-08-26 571bc2f 3,863 BA view · diff
git:20260715.61691192026-07-15 6169119 3,863 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 (3863 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

sigistry/marketplace · 3 stars · license MIT · pushed 2026-09-15 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_f43uimxk47tgqzzf
GET https://markdownregistry.com/api/v1/resolve?ref=sigistry/marketplace/prompt-versioning-hygiene
GET https://markdownregistry.com/api/v1/blob/204b8746dd5c458fc8db0c31ec995a7c4bae23fcb368928e3d2f082a2376f137

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