ed3dai/ed3d-plugins · plugins/ed3d-extending-claude/skills/prompt-security-hardening/SKILL.md

prompt-security-hardening skillA

prompt-security-hardening is agent-read markdown (skill) from ed3dai/ed3d-plugins: Use when writing skills, CLAUDE.md files, agent prompts, or any directives that involve shell commands, environment variables, API credentials, file creation, or git operations - prevents secrets leakage into LLM context, unsafe shell patterns, and credential exposure.

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 ed3dai/ed3d-plugins/prompt-security-hardening@git:20260319.b0d6d88
Exact content
mdr add ed3dai/ed3d-plugins/prompt-security-hardening@sha256:fee77973f2e9843f

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_7yazvrz4p24vvnxc.svg)](https://markdownregistry.com/a/art_7yazvrz4p24vvnxc)

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Versions

versioncommittedcommitsizeaudit
git:20260319.b0d6d88 latest2026-03-19 b0d6d88 9,873 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 (9873 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

ed3dai/ed3d-plugins · 249 stars · license none · pushed 2026-09-06 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_7yazvrz4p24vvnxc
GET https://markdownregistry.com/api/v1/resolve?ref=ed3dai/ed3d-plugins/prompt-security-hardening
GET https://markdownregistry.com/api/v1/blob/fee77973f2e9843fb2c078f1fd618b5e69f61036040611db1385c6b7e81f7953

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