AkZcH/Cairn ? reverse-engineered prompt

Build me a local first personal knowledge base app that can import my markdown and text notes, break them up by headings so the answers stay coherent, and let me search them with both keyword and semantic search. I want it to answer questions only from my notes and always show citations for where each answer came from, and if it does not know something it should say so instead of making things up.

It should have a simple landing page and a logged in dashboard, with real accounts, chat history, file upload, and the ability to keep conversations going over time. I also want a way to ingest a whole folder of notes from the command line, plus upload or paste text from the web app. Use a local embedding model if possible, keep everything running on my machine with Postgres, and make sure re importing an edited note updates the old chunks instead of duplicating them. If you need to check current docs for any libraries, look them up online.