Summary

• Added reuse_session flag to POST /api/chat — when true and no session_id is provided, reuses the most recently active session instead of creating a new one
• Added CHAT_PROMPT env var for the chat API to load a different system prompt (e.g., CHAT_PROMPT=headless resolves to prompt/en/headless.md)
• Created prompt/en/headless.md — text-optimised prompt with numeric formatting, markdown support, and no voice/TTS constraints
• Added Open-WebUI filter (integrations/openwebui/caal_offload.py) that routes keyword-triggered messages to CAAL's chat API with session reuse, and supports reload caal / caal reload commands to hot-reload CAAL from the chat

Note

I am not too picky about where caal_offload.py is stored. integrations/openwebui/ is a temporary location - feel free to move it elsewhere.

Type of Change

• New feature (non-breaking change that adds functionality)