@guardrail-ai/fixer

AST-based auto-fix engine for Guardrail. Applies fixes from rule violations and outputs unified diffs.

Install

npm install @guardrail-ai/fixer

Usage

import { FixerEngine } from '@guardrail-ai/fixer';

const fixer = new FixerEngine();

// Dry run — returns diff without writing
const result = await fixer.applyFixes(filePath, violations, false);
console.log(result.diff);
console.log(`${result.applied} fixes applied`);

// Write fixes to disk
await fixer.applyFixes(filePath, violations, true);

How it works

1. Sorts fixes bottom-to-top to preserve line numbers
2. Applies line-based replacements from violation fix suggestions
3. Generates unified diffs via the diff package
4. Optionally writes the fixed file to disk

License

MIT