SecondSelf

Second Yourself

Pre-release: the design changes often until v1.0. Forks are welcome; pull updates often.

Second yourself. One agent that remembers you, with many hands to act for you.
*Tony Stark never had to reintroduce himself to Jarvis. Jarvis thought with him, acted for him, and never forgot.*

We believe true intelligence comes from the same composition. A foundation model gives it reason. A multi-agent harness gives it hands. A well-structured knowledge base gives it memory. Second Yourself is built where the three meet.

Today Second Yourself runs in Claude Code or the Claudian plugin inside Obsidian, with GPT models as helper agents through the Codex CLI and a wiki of plain Markdown on your own machine.

A second brain stores what you know. A second self knows it with you and acts on it.

What you build is up to you:

* A second you, the goal this project is built towards: an agent that can act for you rather than only answer, from a brief in your voice to an elderly parent's medication and appointments.
* A research assistant, what ships today: drop in papers and articles, ask questions, and get answers cited from your own library.
* A shared brain for many agents, which already runs: one wiki that a team of agents works from.

The foundation model

Reasoning comes from whichever frontier model you plug in. Today Claude models coordinate the work. From release v0.9.6, a launcher with its own test script runs the GPT helper agents. Models are replaced every year. The other two parts are yours, and they compound.

The multi-agent harness

You speak to one agent, and it briefs helper agents under a written contract. Each helper may write only the files it is given. Long jobs run unattended for hours.

Independent critic and verifier agents check the work. A…