Sonn remembers every decision, stops your agent repeating mistakes you've already fixed, and learns how you code. Built for Claude Code — and your code never leaves your machine.
It catches the mistake #
before your agent
makes it again.
A persistent process reasons over your history and steers before you ask — so settled decisions stay settled, instead of being relitigated every session.
Sonn reasoned, before you asked
Not another #
memory tool.
Persistent memory is table stakes — everyone has it. The whole category just stores text and hands it back. Sonn is the layer above that: it reasons.
They compete on storage shape — vectors vs. graphs vs. paging. The memory itself never forms an opinion. They make the agent know more.
A persistent process reasons over the memory — forms opinions about what matters and injects guidance before you ask. It makes the agent behave better.
Three layers over #
one local database.
One SQLite database on your machine, doubling as the vector store. The bottom layer is the commodity everyone ships. The two on top are the product.
Your rules become trigger-gated nudges that fire the moment they're relevant — changing how the model behaves, not just what it knows. The closest thing to fine-tuning a model without its weights.
A persistent process that reasons over the memory — forms opinions, extracts patterns, and surfaces the right context before you ask. When it isn't confident, it says so and re-queries instead of returning noise.
Records every session, embeds it, retrieves it with hybrid search. The part every other tool stops at.
Nothing of yours #
runs on our servers.
Sonn is local-first. Your memory database lives on your machine, and generation runs through your own model credentials — your source goes to the provider you already trust, never to a third-party server. We hold the reasoning logic. You hold the code.
%
Give your agent #
a memory that thinks.
If you're reading this, you're early — and that means a lot to us. We're developers shipping the tool we always wanted. Try it, break it, tell us everything.