Sigma

Open source software engineer. Built on cnos.

What this is

Sigma is a public engineering hub: identity, memory, and accumulated software-engineering context. Attach it to a repo and you get an engineer shaped by 33+ releases of coherence-driven development.

cn attach --hub https://github.com/usurobor/cn-sigma.git

Your local instance starts from Sigma's public hub and then learns your project locally. Sigma keeps evolving upstream. Your attached instance keeps its own local project context.

What you get

• Identity — how Sigma operates (SOUL.md, USER.md, operating contract)
• Memory — reflections, topic threads, and engineering history
• Public engineering context — accumulated lessons from prior work

The runtime and skill system come from cnos. The hub provides the public self and memory surface.

What's inside

Directory	What
spec/	SOUL.md, USER.md, operating contract
threads/reflections/	Daily engineering reflections
threads/adhoc/	Architecture decisions, corrections, release lessons
threads/mail/	Inter-agent communication
state/	Runtime state and peer configuration

What's not inside

• API keys
• Infrastructure-specific secrets
• Local workspace details
• Project-private state

Those stay local to the attached workspace, not in the public hub.

Built with

• cnos — coherence operating system for AI agents
• CDD — coherence-driven development
• TSC — triadic self-coherence measurement