System Architecture

Five-Plane Stack

A layered architecture designed for clarity, separation of concerns, and graceful degradation.

04

Experience / Engineering

Surface Layer

User-facing interfaces, developer tools, and API surfaces. This layer handles all external interactions and provides the primary touchpoints for humans and systems.

Web UI CLI REST API WebSocket SDK
03

Governance / Operations

Policy Layer

Policy enforcement, audit logging, compliance checks, and operational oversight. Every action passes through governance filters before execution.

Policy Engine Audit Log Compliance Rate Limiting Permissions
02

Perception / Action

Execution Layer

Tool orchestration, action execution, and multimodal perception. This layer transforms intent into concrete operations across connected systems.

Tool Router Action Executor Multimodal Parser Event Publisher
01

Cognitive State

Reasoning Layer

Memory management, context building, mode selection, and reasoning coordination. Maintains session continuity and orchestrates specialist agents.

Memory Store Context Builder Mode Selector Orchestrator
00

Runtime

Foundation Layer

Core infrastructure, data persistence, event bus, and foundational services. Provides the substrate upon which all higher layers operate.

PostgreSQL Redis Event Bus Object Storage Secrets

Data Flow

How information moves through the system

01

Ingestion

Event enters through API, CLI, or automated trigger

02

Governance Check

Policy validation and permission verification

03

Context Building

Memory retrieval and state reconstruction

04

Execution

Tool orchestration and action performance

05

Persistence

State update and audit trail logging

Design Principles

Core tenets guiding architectural decisions

Fail Gracefully

Every component can degrade without cascading failure. System continues operation even when subsystems are unavailable.

🔍

Inspect Everything

All state transitions, decisions, and actions are logged and auditable. No hidden processes or opaque operations.

🎯

Separation of Concerns

Each plane has a single, well-defined responsibility. Clear boundaries prevent coupling and enable independent evolution.

🔄

Event-Driven

Asynchronous, loosely-coupled communication enables scaling, replay, and temporal decoupling of operations.

🛡️

Policy-First

Governance is not an afterthought. Every action is subject to policy constraints enforced at the architectural level.

👤

Human Override

Humans can intervene at any layer, any time. Automation serves humans, not the other way around.