# Leveled Logs – `debug`, `info`, `warn`, `error`

These methods respect the `LOG_LEVEL` environment variable and automatically include the **level label** and **caller context** (file, function, line).

## Methods

* `log.debug(message?, data?)`
* `log.info(message?, data?)`
* `log.warn(message?, data?)`
* `log.error(message?, data?)`

Each accepts the same argument patterns:

```ts [index.ts]
log.info("User fetched", { id: 42 }); // message + data
log.warn({ diskUsage: "90%" }); // data only
log.error(); // level + context only
```

## Context

The prefix `[/path/file.ts:line funcName]` is automatically added to every leveled log:

```ts [index.ts]
// Inside a function named "processTask"
log.debug("Processing", { taskId });
```

```bash [terminal]
[/src/tasks.ts:2 processTask] DEBUG Processing
├─ taskId: abc-123
```

## Log Levels

Log levels follow a hierarchy (`debug` \< `info` \< `warn` \< `error`). The default minimum level is `info` – debug logs are hidden unless you set `LOG_LEVEL=debug`.

```bash [terminal]
LOG_LEVEL=debug bun run app.ts
```