# Yamllint Processor
## Purpose
Lints YAML files using [yamllint](https://github.com/adrienverge/yamllint).
## How It Works
Discovers `.yml` and `.yaml` files in the project (excluding common build tool
directories), runs `yamllint` on each file, and records success in the cache.
A non-zero exit code from yamllint fails the product.
This processor supports batch mode, allowing multiple files to be checked in a
single yamllint invocation for better performance.
## Source Files
- Input: `**/*.yml`, `**/*.yaml`
- Output: none (checker)
## Configuration
```toml
[processor.yamllint]
command = "yamllint" # The yamllint command to run
args = [] # Additional arguments to pass to yamllint
dep_inputs = [] # Additional files that trigger rebuilds when changed
```
| `command` | string | `"yamllint"` | The yamllint executable to run |
| `args` | string[] | `[]` | Extra arguments passed to yamllint |
| `dep_inputs` | string[] | `[]` | Extra files whose changes trigger rebuilds |
## Batch support
The tool accepts multiple files on the command line. When batching is enabled (default), rsconstruct passes all files in a single invocation for better performance.
## Clean behavior
This processor is a Checker — `rsconstruct clean outputs` is a no-op for it (checkers produce no outputs). See [Clean behavior](../processors.md#clean-behavior) and [`rsconstruct clean`](../commands.md#rsconstruct-clean).