Camb AI + Nextcloud Integration

Wire Camb AI's ai events into Nextcloud's productivity actions so handoffs stay automatic.

Example: when Nextcloud's "Watch Activities" fires, WEXTL can "Create a Text-to-Sound Task" in Camb AI. Camb AI has 10 actions (including Create a Text-to-Sound Task, Create a Transcription, and Create Text to Speech); Nextcloud has 59 actions (including Add User to Group, Autocomplete Users, and Copy Path).