Individual skill
guardrails
How AgentGuards enforces its guardrails in Codex — fully automatic, via hooks, with nothing for you to call. Load this if asked how AgentGuards works, whether you need to screen something yourself, or why no agentguards check_input / authorize_action tools are available.
plugins/alelaguard/agentguards-plugins/skills/guardrails/SKILL.md
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# AgentGuards — enforced by hooks
This plugin has no MCP server, so there is no `check_input`, `authorize_action`
or `health_check` tool — do not look for them, they are not installed.
That is not reduced protection. The hooks in `hooks/hooks.json` enforce
deterministically, on every request, whatever the model does:
- **`UserPromptSubmit`** screens every prompt before you see it.
- **`PreToolUse`** authorizes every shell command before it runs: denied, or
allowed, or left to Codex's own approval prompt.
- **`PermissionRequest`** rides that approval prompt: it denies what AgentGuards
rejects and remembers what the user approved for the rest of the session.
- **`PostToolUse`** scans the output of shell commands that fetch (`curl`,