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Modulo

Architecture

Modulo uses a core pipeline engine that connects agents, connectors, and model backends into governed pipelines.

Modulo is a graph engineering platform: the pipeline engine compiles a StateGraph of agent nodes, where each node is an agent, connector, or gate and each edge is a typed, governed transition. Graph engineering is the practice of designing agent systems as explicit graphs (nodes and edges) rather than a single agent loop; Modulo makes that graph executable, observable, and auditable.

Layers

Layers
Layer Role
Pipeline Engine Compiles and executes a StateGraph of agent nodes
Connector Hub Manages tool integrations (GitHub, Notion, filesystem)
Model Backend Hub Routes large language model (LLM) calls across providers (Anthropic, OpenAI, local)
Schema Registry Versioned typed schemas for artifact validation
Audit Logger Immutable record of every action and decision
Human-in-the-Loop (HITL) Manager Claim, review, and gate enforcement

Data Flow

  1. A trigger (manual, webhook, cron, polling, agent signal, ongoing, or Slack app-mention) starts a pipeline run
  2. The engine compiles a StateGraph from the pipeline definition
  3. Nodes execute as their dependencies complete. Agents call models via backends and tools via connectors.
  4. HITL checkpoints pause execution until a human reviews the artifact
  5. The completed artifact is routed to its destination: a pull request (PR), a ticket, or a file
Next: Pipelines