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# getConfig

> Look up a configuration value passed to the skill's constructor.

Look up a configuration value by key, with an optional default. The `config`
object is whatever was passed to the skill's constructor (typed as
`SkillConfig`, a string-keyed record). Values are returned as-is; the caller
provides the type argument for casting.

## **Parameters**

**`key`** `string` — required

The configuration key to look up.

---

**`defaultValue`** `T | undefined`

Value to return when the key is not present. The result is cast to `T`.

---

## **Returns**

`T` -- the configured value cast to the generic type, or the default value.

## **Example**

```typescript {9,10}
import { SkillBase } from '@signalwire/sdk';

export class WeatherSkill extends SkillBase {
  static SKILL_NAME = 'weather';
  static SKILL_DESCRIPTION = 'Fetches current weather for a city.';

  async setup(): Promise<boolean> {
    const apiKey = this.getConfig<string>('api_key');
    const units = this.getConfig<'metric' | 'imperial'>('units', 'metric');
    if (!apiKey) return false;
    this.logger.info(`Weather skill configured in ${units} units`);
    return true;
  }
}
```

> Look up a configuration value passed to the skill's constructor.