# What changed in @lit-labs/signals

> 1 change in @lit-labs/signals 0.3 from its official release notes, upgrade guides and advisories: 1 new APIs and options. Each one cited. Sources checked 2026-10-27. HTML: https://unstale.sh/npm/@lit-labs/signals/

To see which of these apply to a repository, run `npx @unstale/cli init` in it.

## @lit-labs/signals 0.3

### New APIs and options

- Exports the SignalWatcherApi interface used in the return type of the SignalWatcher mixin. (0.3.0) — [release notes](https://github.com/lit/lit/releases/tag/%40lit-labs/signals%400.3.0)