diff --git a/Watchlist-for-ActivityPub-developer-resources.md b/Watchlist-for-ActivityPub-developer-resources.md
index d8e8245..1fb4c47 100644
--- a/Watchlist-for-ActivityPub-developer-resources.md
+++ b/Watchlist-for-ActivityPub-developer-resources.md
@@ -40,6 +40,8 @@
 
 * :heavy_check_mark: [**CommonsPub**](https://gitlab.com/CommonsPub) ([site](http://commonspub.org)): Building blocks for creating multifunctional federated networks with ActivityPub. `AGPL-3.0, Elixir`
 
+* :black_nib: [**corpus-activity-streams**](https://github.com/ryanatkn/corpus-activity-streams): Activity Streams 2.0 vocabulary data and alternative docs. `Unlicense license, Typescript`
+
 * :heavy_check_mark: [**Express ActivityPub**](https://github.com/dariusk/express-activitypub): A very simple reference implementation of an ActivityPub server using Express.js. `MIT, Javascript`
 
 * :heavy_check_mark: [**astreams**](https://github.com/MatejLach/astreams) ([Fedi account](https://social.matej-lach.me/@MatejLach)): A hand-crafted implementation of the Activity Streams 2.0 specification in Go, especially suitable for projects implementing ActivityPub. `AGPL-3.0, Go`