agent-second-brain

About agent-second-brain

An always-on second brain you talk to. Voice note in Telegram → typed, linked knowledge in your Obsidian vault. Runs 24/7 on a $5 VPS and the Claude subscription you already pay for — zero per-token API bills.

Every productivity system dies the same way. You set it up on a Sunday, use it for two weeks, then slowly stop — because maintaining the system is more work than the work itself. Voice memos you never re-listen to. Ideas that drown in chat history. A vault of markdown files that nobody, including you, can navigate a month later.

The fix isn't another app. It's removing the organizing step entirely: you talk, the agent files. And it has to be yours — I wasn't going to pipe my private notes, clients, and goals through somebody's SaaS. Everything here runs on your own server, lands in your own Obsidian vault as plain markdown, and is small enough to actually read before you trust it with your life.

From the project's README

agent-second-brain is an open-source project written primarily in Python, with 352 stars on GitHub. It was last updated in August 2026.