Built a lightweight knowledge-graph “second brain”: paste notes → auto-link concepts → ask questions
Hi everyone — I’m Hoang, the solo founder of Neurix.
https://www.neurix-org.com/
I kept running into the same problem: I save tons of notes (study, work, random ideas), but when I actually need something later, I either can’t find it or I don’t know what it connects to. So I started building Neurix as a “second brain” that’s less about storing and more about retrieving + connecting.
What Neurix does (in plain terms)
Neurix turns each piece of content into a knowledge node:
You paste text (or upload a doc)
It generates a clean summary + key concepts
Then it links the node to related nodes in your graph (based on shared concepts + semantic similarity)
When you ask a question, it retrieves the most relevant nodes and answers with citations (so you can see what it used)
The workflow (current MVP)
Paste Text/Content → “Create node.”
Click “Add to graph” → see related nodes highlighted
Ask: “How does this connect to my other notes?” / “Explain this in a simpler way.” / “What am I missing?”
It answers + shows which nodes it pulled from
Why I designed it this way
I use summaries + concepts instead of raw long content for faster retrieval and less noise
Concepts are pooled/normalized over time to reduce duplicates (so the graph gets cleaner as you use it)
Citations are non-negotiable — if it answers, it should show where it got it from
Where I’m not sure (and would love your feedback)
If you use note apps / PKM tools: what makes you actually stick long-term — better capture, better organization, or better retrieval?
Would you prefer “auto-link everything” (more connections, noisier) or “link conservatively” (fewer but cleaner)?
For students: would you want this to behave more like exam revision (flashcards/outlines/gaps) or more like research mapping (sources + relationships)?
I’m not here to spam — I genuinely want critique on the workflow and what would make this useful enough to keep using.
If anyone’s curious to try the demo, comment, and access the above link.
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