guardrails SKILL.md skillA

guardrails from alelaguard/agentguards-plugins is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

mdr add alelaguard/agentguards-plugins/guardrails@git:20260804.c8a22f2

Pins git:20260804.c8a22f2 in mdr.lock. Pin the fingerprint instead.

Audit grade

A, 17 of 17 checks passed

Kind

SKILL.md skill

Repository

alelaguard/agentguards-plugins

Path

codex-selfhosted/skills/guardrails/SKILL.md

Versions recorded

1

Latest version

git:20260804.c8a22f2, committed Aug 4, 2026

Size

1,890 bytes

Repository stars

4

License

MIT

AgentGuards security guardrails for a self-hosted appliance — explains that enforcement is fully automatic via hooks and there is nothing further to call. Load this if asked how guardrails are enforced in this variant, or why no agentguards MCP tools are available.

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

# AgentGuards — self-hosted, hooks-only

This variant bundles no MCP server, so there is no `check_input`/`authorize_action`
to reach for — do not look for them, they are not installed here.

That is not reduced protection. The four hooks in `hooks/hooks.json` enforce
deterministically, on every request, regardless of anything the model does:

- **`UserPromptSubmit`** screens every prompt before you see it.
- **`PreToolUse`** authorizes every shell command before it runs.
- **`PostToolUse`** scans fetched web content and redacts or withholds it.
- **`PermissionRequest`** is the real approval prompt for anything not
  automatically allowed — `PreToolUse` cannot itself ask in Codex, only allow
  or deny.

Nothing here requires you to call a tool, check a decision, or format a block
message — the hook has already acted by the time you see (or don't see) the
result. If a hook blocks something, reply with its message rather than
composing your own.

**Why no MCP server:** Codex's `.mcp.json` cannot substitute an environment
variable into its `url` field, so a URL baked in at publish time cannot be
made to point at each installer's own appliance — it would either be fixed to
…

Read the whole file at its exact version.

How to install

mdr add alelaguard/agentguards-plugins/guardrails@sha256:94e1edac1b25a43c

[![mdr](https://markdownregistry.com/badge/art_hpotuvegpr7hdc2w.svg)](https://markdownregistry.com/a/art_hpotuvegpr7hdc2w)

Versions

The registry has recorded 1 version of this file, committed on Aug 4, 2026.

Audit of the latest version

Source

API

GET https://markdownregistry.com/api/v1/artifacts/art_hpotuvegpr7hdc2w
GET https://markdownregistry.com/api/v1/resolve?ref=alelaguard/agentguards-plugins/guardrails
GET https://markdownregistry.com/api/v1/blob/94e1edac1b25a43c113e8e99d21f10a04e0b3cb4e606af0224e850a7b5a18c23

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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