# set

Set a key-value pair in the Record.

## Signatures

```ts
export declare const set: {
    <K extends string, V>(key: K, value: V): <E, R>(ref: RefRecord<K, V, E, R>) => Effect.Effect<Record.ReadonlyRecord<K, V>, E, R>;
    <K extends string, V, E, R>(ref: RefRecord<K, V, E, R>, key: K, value: V): Effect.Effect<Record.ReadonlyRecord<K, V>, E, R>;
};
```

## Why

Keeps set atomic with respect to competing RefSubject writes instead of splitting the read and
replacement into separate effects.

## Ownership and lifetime

Running set performs one serialized record transition and resolves with its committed value. It
acquires no resource; failures and services remain those of the source ref.