Signal Bus Architecture

Typed inter-agent communication with priority levels and expiration. How agents coordinate without direct coupling.

In a traditional SaaS stack, tools don't talk to each other. You use Zapier or Make to build fragile bridges between them. In an Agent OS, agents communicate through a typed signal bus.

steadybase's Signal Bus uses typed signals with priority levels (low, normal, high, urgent) and expiration. When PipeScout detects an account signal, it publishes to the bus. RollCall subscribes and sees the signal. InkPost subscribes and sees it too. Each agent decides independently how to act.

This is fundamentally different from workflow automation. There's no pre-defined if-then chain. Agents reason about signals and decide what to do. The bus provides the infrastructure. The agents provide the intelligence.

Critically, signals are typed and contracts are declared in the AppManifest. This means the OS knows which agents talk to which, enabling governance and debugging across the entire system.