guardrails SKILL.md skillA
guardrails from fusengine/agents is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add fusengine/agents/guardrails@git:20260729.3b91eedPins git:20260729.3b91eed in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- fusengine/agents
- Path
plugins/prompt-engineer/skills/guardrails/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260729.3b91eed, committed Jul 29, 2026
- First version recorded
- Jan 22, 2026
- Size
- 5,196 bytes
- Repository stars
- 36
- License
- MIT
Use when implementing input/output guardrails, writing ethical guardrail templates, or auditing an agent/prompt for missing security controls.
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
<objective>
Guardrails covers the 4-layer security architecture for an agent or prompt: input (harmlessness screening, jailbreak pattern matching, PII redaction), system (ethical guardrails in the system prompt, explicit capability limits, refusal instructions), output (format validation, hallucination detection, compliance checks), and monitoring (interaction logs, suspicious-pattern alerts, rate limiting).
It includes a ready-to-use ethical-guardrails template and a security checklist covering both the agent level (guardrails per layer, least-privilege tools, logging) and the prompt level (explicit Forbidden section, capability limits, error-case handling, no hardcoded sensitive data).
</objective>
# Guardrails
Skill for implementing security guardrails and quality control.
## 4-Layer Security Architecture
```
┌─────────────────────────────────────────────────────┐
│ LAYER 1: Input │
│ - Harmlessness screen (lightweight LLM) │
│ - Pattern matching (jailbreak regex) │
│ - PII detection/redaction │
└─────────────────────────────────────────────────────┘
│
…Read the whole file at its exact version.
How to install
mdr add fusengine/agents/guardrails@sha256:4588a9b4686c36bcThe line at the top of this page pins the label git:20260729.3b91eed, 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_nqy36mtfdizdwivq)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jan 22, 2026 and Jul 29, 2026, about one every 47 days. Its first recorded version is graded C and its latest A.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260729.3b91eed latest | 2026-07-29 | 3b91eed | 5,196 B | A | view · diff |
| git:20260705.ba8ee52 | 2026-07-05 | ba8ee52 | 4,549 B | A | view · diff |
| git:20260705.8c2f9bc | 2026-07-05 | 8c2f9bc | 4,547 B | A | view · diff |
| git:20260124.acdc941 | 2026-01-24 | acdc941 | 4,402 B | A | view · diff |
| git:20260122.f6bc08c | 2026-01-22 | f6bc08c | 7,688 B | C | 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 (5196 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
fusengine/agents · 36 stars · license MIT · pushed 2026-10-30 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_nqy36mtfdizdwivq GET https://markdownregistry.com/api/v1/resolve?ref=fusengine/agents/guardrails GET https://markdownregistry.com/api/v1/blob/4588a9b4686c36bc6e5bf944f3f0601e6b17763aa1d559d1185b46da3c66ef03
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.
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