# Validate JSON by JSON Schema Action

A GitHub Action that automatically validates JSON files using their `$schema` reference. The action extracts the schema URL from the JSON file, downloads it, migrates it to the latest version, and validates the JSON against the schema.

## Usage

```yaml
- name: Validate JSON file
  uses: your-username/validate-json-by-json-schema-action@v1
  with:
    json-file: "path/to/your/file.json"
```

## Inputs

| Input       | Description               | Required | Default |
| ----------- | ------------------------- | -------- | ------- |
| `json-file` | The JSON file to validate | Yes      | -       |

## How it works

1. Extracts the `$schema` URL from the specified JSON file
2. Downloads the schema from the URL
3. Migrates the schema to the latest version using `ajv-cli`
4. Validates the JSON file against the schema
5. Exits successfully if validation passes, fails if validation fails

## Requirements

- The JSON file must contain a `$schema` property with a valid URL
- The schema URL must be accessible via HTTP/HTTPS
- The action uses `ajv-cli` for validation with `--strict=false` mode