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Sonn remembers every decision your AI coding agent makes, stops it repeating mistakes you already fixed, and learns how you work. Built for Claude Code. Local-first.
Grounded in available product and source data
Sonn is a local-first reasoning and memory layer for AI coding agents, built for Claude Code. It records sessions and reasons over past decisions so that settled choices stay settled instead of being relitigated, learning how you work and shaping how the agent acts, not just what it knows, while surfacing relevant patterns before you have to ask.
Your database lives on your own machine, generation uses your own credentials, and no source code is sent to Sonn's servers.
It's built to stop your coding agent from repeating mistakes you've already fixed — instead of starting fresh each session, it remembers the decisions that were already made and carries them forward.
It's for developers using Claude Code who want the agent to remember past decisions instead of repeating mistakes.
Sonn doesn't route your code through a shared hosted service — generation runs on the credentials you already have, so requests go through your own provider access instead of Sonn's infrastructure.
It records sessions and learns how you work to provide guidance at the right moment, shaping how the agent acts based on your patterns.
