When I add a background messages I later find the message being cut to 1000 characters in the message list that I later receive from vapi. On adding there is no error or warning.

Hi Vihren Ganev Realistimo, Thanks — background messages are supported via vapi.send with type "add-message" and role "system" (see docs: https://docs.vapi.ai/assistants/background-messages). Root cause and next steps: - Known behavior: Vapi truncates some message fields in downstream call/webhook payloads to \~1000 characters (this explains seeing the cut message in the message list you receive). - Repro checklist for me to investigate faster: 1. Exact payload you send to vapi.send (redact any secrets). 2. A copy of the message as you add it (full text >1000 chars). 3. The message list / webhook body you receive that shows the truncated content. 4. Assistant ID or phone number involved and a timestamp for the add-message call.