Second Brain for AI v2

AI memory that connects the dots across every tool

Productivity

Developer Tools

Artificial Intelligence

GitHub

Hi Product Hunt, Three weeks ago, I launched Second Brain for AI here. It finished #3 Product of the Day, but the most valuable part of the launch was not the ranking. It was the comments. You told me that newer information is not always more correct. You asked what happens when Claude and Cursor save conflicting versions of the same project decision. You described the need to compress long conversations without losing their through-line. You pushed me to make self-hosted deployment easier to understand. Those comments became the roadmap. The first version gave Claude, ChatGPT, Cursor, and other MCP clients one persistent memory layer. You could store context once, retrieve it by meaning, and keep the data inside your own Cloudflare account. Today I am launching v2. Second Brain now builds a self-organizing knowledge graph from your memories: - related memories link automatically as they are saved - multi-hop recall follows those links beyond the closest semantic match - an interactive graph shows how projects, people, decisions, preferences, and ideas connect - canonical, draft, and deprecated states separate settled knowledge from exploration and stale context - episodic and semantic classification distinguishes events from durable knowledge - hybrid retrieval combines semantic and keyword recall - contradiction-aware ranking prevents recency from automatically becoming truth - semantic compression preserves the important through-line as context grows The core promise has not changed. Second Brain is still one open-source memory layer for every AI tool you use, deployed into your own Cloudflare account and designed to run on the free tier at personal scale. V1 made memory persistent. V2 makes it connected and more trustworthy. I would especially value feedback on three things: 1. Are the automatically created relationships accurate enough to trust? 2. Does multi-hop recall surface useful context that ordinary semantic search misses? 3. Does the graph help you understand your memory, or is it only visually interesting? Thank you to everyone who commented, tested the product, opened an issue, followed the first launch, or shared Second Brain with others. You helped shape this release.