> ## Documentation Index
> Fetch the complete documentation index at: https://veryfront.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# veryfront/metrics

> Runtime/application metric hooks for project code.

## Import

```ts theme={null}
import {
  counter,
  gauge,
  histogram,
  metrics,
} from "veryfront/metrics";
```

## Examples

```ts theme={null}
import { metrics } from "veryfront/metrics";

metrics.counter("vf_eval_result_total", 1, { provider: "openai" });
metrics.histogram("vf_eval_latency_ms", 420, { model: "gpt-5" });
metrics.gauge("vf_eval_queue_depth", 3);
```

## Exports

### Functions

| Name        | Description | Source                                                                                    |
| ----------- | ----------- | ----------------------------------------------------------------------------------------- |
| `counter`   |             | [source](https://github.com/veryfront/veryfront-code/blob/main/src/metrics/index.ts#L445) |
| `gauge`     |             | [source](https://github.com/veryfront/veryfront-code/blob/main/src/metrics/index.ts#L473) |
| `histogram` |             | [source](https://github.com/veryfront/veryfront-code/blob/main/src/metrics/index.ts#L459) |

### Types

| Name                      | Description | Source                                                                                   |
| ------------------------- | ----------- | ---------------------------------------------------------------------------------------- |
| `MetricAttributes`        |             | [source](https://github.com/veryfront/veryfront-code/blob/main/src/metrics/index.ts#L28) |
| `MetricAttributeValue`    |             | [source](https://github.com/veryfront/veryfront-code/blob/main/src/metrics/index.ts#L27) |
| `MetricInstrumentOptions` |             | [source](https://github.com/veryfront/veryfront-code/blob/main/src/metrics/index.ts#L30) |

### Constants

| Name      | Description | Source                                                                                    |
| --------- | ----------- | ----------------------------------------------------------------------------------------- |
| `metrics` |             | [source](https://github.com/veryfront/veryfront-code/blob/main/src/metrics/index.ts#L493) |