How to Build a Plugin from Scratch in Cowork (2026 Guide)
· 5 min read
If you want Cowork to do real work for you, plugins are the lever.
As of February 28, 2026, we now have a clear official path:
- Anthropic introduced Cowork on January 14, 2026
- Custom plugin creation/sharing was announced on January 20, 2026
- Enterprise plugin directory updates shipped on February 24, 2026
- Plugin help docs were updated on February 25, 2026
This guide combines that official flow with practical lessons from community users so you can build your first useful plugin from scratch.