Changes
- Add persistent markdown memory with hybrid SQLite recall and agent flush integration
- Add x_search tool and x-research skill for public sentiment research
- Add group chat support for WhatsApp gateway (mention-based activation, group context)
- Add gpt-5.4 model support
- Update location of hidden files to project root
- Turn off LangSmith tracing by default
Fixes
- Fix gateway to use model and provider from user settings (.dexter/settings.json) instead of hardcoded gpt-5.4/openai