How Nexus Note works
A local intelligence system that ingests, indexes, reasons, and acts—entirely on your Mac.
Everything becomes a note
In Nexus Note, a "note" isn't just a text document. It's the atomic unit of meaning—any piece of information worth remembering.
This reframing is fundamental. When everything important becomes a note, your entire digital life becomes queryable, connectable, and actionable.
Files, PDFs, Markdown, rich text
Meetings, deadlines, reminders
To-dos, projects, commitments
Messages, threads, attachments
Audio and video recordings
Choices, settings, decisions
Inferred routines and behaviors
Context you want to remember
The pipeline
Four stages transform raw information into usable intelligence—all running locally on your machine.
Ingest
Notes flow in from the sources you already use. No migration required—Nexus Note connects to your existing tools.
Watch folders for documents, PDFs, images, and any file type you choose.
Sync events, meetings, and scheduling context from your calendar apps.
Index messages, threads, and attachments with full-text search.
Transcribe recordings and meeting audio into searchable notes.
Index locally
Every note is processed into a unified representation, then indexed for both semantic and keyword search.
All formats are converted to a unified internal representation so the system can reason across them.
Local embedding models create vector representations for semantic similarity search.
Fast keyword search with fuzzy matching, filters, and boolean operators.
Notes are linked by time, topic, project, and inferred relationships.
Retrieve and reason
When you ask a question, the system retrieves relevant notes and uses a local LLM to synthesize an answer.
Combines semantic search with keyword matching to find the most relevant notes.
A model running on your Mac synthesizes answers from retrieved context.
Every answer includes source links so you can verify and explore further.
The system signals when it's uncertain or when sources may be outdated.
Act with consent
Beyond answering questions, Nexus Note can take action—but only with explicit confirmation.
Generate follow-up emails, meeting summaries, or document drafts based on your notes.
Extract action items from meetings and add them to your task system.
Propose calendar events based on commitments mentioned in notes.
Suggest edits, link related notes, or flag outdated information.
Intelligence from connection
The power of Nexus Note isn't in storing more—it's in connecting what you already have. When your calendar knows about your documents, and your emails know about your tasks, questions that used to require hours of digging become instant.
The best AI is invisible until it matters.
Under the hood
For those who want to know what's running on their machine.
Embedding and language models run entirely on your Mac using optimized inference (Metal, MLX, or llama.cpp).
A local vector store enables fast semantic search across millions of embeddings.
All metadata, relationships, and indexes stored in a portable SQLite database you can inspect anytime.
Built for macOS with native APIs for file system access, calendar integration, and system services.
Everything runs offline. Optional cloud features (backup, sync) are explicit and user-controlled.
Your data is stored in standard formats. Export everything as JSON, Markdown, or SQLite at any time.