# Diesel Guard

> Use this skill when the user wants to lint Postgres migrations for unsafe patterns, prevent downtime from bad migrations, or check Diesel/SQLx migration safety.

- Skill: `javimosch/diesel-guard` (Agent Skill)
- Install (CLI): `npx skillmds@latest add javimosch/diesel-guard`
- Raw SKILL.md: https://api.skillmd.com/api/skills/javimosch/diesel-guard/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: javimosch (https://skillmd.com/u/javimosch)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/javimosch/diesel-guard

---


# diesel-guard Plugin

Linter for dangerous Postgres migration patterns in Diesel and SQLx.

## Commands

### Check
- `diesel-guard migration check` — Check migrations for unsafe patterns

## Usage Examples
- "Lint migrations for unsafe patterns"
- "Initialize diesel-guard config"
- "Check specific migration files"

## Installation

```bash
cargo install diesel-guard
```

Or:
```bash
brew install ayarotsky/tap/diesel-guard
```

## Examples

```bash
# Initialize
diesel-guard init

# Check migrations
diesel-guard check

# Check specific path
diesel-guard check ./migrations/

# CI with GitHub Actions
# - uses: ayarotsky/diesel-guard-action@v1
```

## Key Features
- Uses libpg_query (Postgres parser)
- Detects table-locking operations
- Works with Diesel and SQLx
- Safety-assured blocks for verified ops
- Version-aware checks
- No DB connection required