# Vigil

> Vigil — Agent Safety Guardrails

- Skill: `javimosch/vigil` (Agent Skill)
- Install (CLI): `npx skillmds@latest add javimosch/vigil`
- Raw SKILL.md: https://api.skillmd.com/api/skills/javimosch/vigil/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: javimosch (https://skillmd.com/u/javimosch)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/javimosch/vigil

---


# Vigil — Agent Safety Guardrails

Validates what AI agents DO, not what they SAY. Drop-in safety layer for any tool-calling agent.

## Prerequisites

This skill requires the `vigil-agent-safety` npm package (12.3KB, Apache 2.0 license):

```bash
npm install vigil-agent-safety
```

- **Source code:** https://github.com/hexitlabs/vigil
- **npm:** https://www.npmjs.com/package/vigil-agent-safety
- **The npm package has zero runtime dependencies.** This skill is a wrapper that calls that package.

## Quick Start

```typescript
import { checkAction } from 'vigil-agent-safety';

const result = checkAction({
  agent: 'my-agent',
  tool: 'exec',
  params: { command: 'rm -rf /' },
});

// result.decision === "BLOCK"
// result.reason === "Destructive command pattern"
// result.latencyMs === 0.3
```

## What It Catches

- Destructive commands (rm -rf, mkfs, reverse shells) → BLOCK
- SSRF (metadata endpoints, localhost, internal IPs) → BLOCK
- Data exfiltration (curl to external, .ssh/id_rsa access) → BLOCK
- SQL injection (DROP TABLE, UNION SELECT) → BLOCK
- Path traversal (../../../etc/shadow) → BLOCK
- Prompt injection (ignore instructions, [INST] tags) → BLOCK
- Encoding attacks (base64 decode, eval(atob())) → BLOCK
- Credential leaks (API keys, AWS keys, tokens) → ESCALATE

22 rules. Zero dependencies. Under 2ms per check.

## Modes

```typescript
import { configure } from 'vigil-agent-safety';

// warn = log violations but don't block (recommended to start)
configure({ mode: 'warn' });

// enforce = block dangerous calls
configure({ mode: 'enforce' });

// log = silent logging only
configure({ mode: 'log' });
```

## Use with Clawdbot

Add Vigil as a safety layer for your agent tool calls. The `scripts/vigil-check.js` wrapper lets you validate from the command line:

```bash
# Check a tool call
node scripts/vigil-check.js exec '{"command":"rm -rf /"}'
# → BLOCK: Destructive command pattern

# Check a safe call
node scripts/vigil-check.js read '{"path":"./README.md"}'
# → ALLOW
```

## Policies

Load built-in policy templates:

```typescript
import { loadPolicy } from 'vigil-agent-safety';

loadPolicy('restrictive');  // Tightest rules
loadPolicy('moderate');     // Balanced (default)
loadPolicy('permissive');   // Minimal blocking
```

## CLI

```bash
npx vigil-agent-safety check --tool exec --params '{"command":"ls -la"}'
npx vigil-agent-safety policies
```

## Links

- GitHub: https://github.com/hexitlabs/vigil
- npm: https://www.npmjs.com/package/vigil-agent-safety
- Docs: https://hexitlabs.com/vigil