A feature common to many UIs is a place to add a default instruction set for the LLM. These presets become part of the prompt. For example, most of what I use Recall for is research for creative writing projects, so I would tune the responses to that specific goal. Instruction presets for each use case are switched on or off, created or edited on the fly and stored for later use. Novelcrafter has a great implementation of this feature called "personas". This would also solve a limitation of the 'summarize' feature. When I use an LLM such as Gemini to summarize content, I get exactly what I want because I can give Gemini precise instructions, but inside Recall the summary feature is unalterably generic, limiting its usefulness. System instructions would fix that. With this feature (along with API integration), Recall would truly be worthy of the title "second brain".