Modus is an open source, serverless framework for building intelligent agents and APIs in Go or AssemblyScript (a TypeScript-like language). Modus is a runtime purpose-built for orchestrating autonomous AI agents that operate as first-class citizens in your stack. You write your app logic in Go or AssemblyScript—whichever you prefer—and Modus compiles everything to WebAssembly for fast performance at scale and at the edge. Each agent instance gets a dedicated execution environment, sand-boxed for resiliency, scalability, and security. Modus enables both stateless functions for quick API responses and stateful agents that maintain persistent memory across interactions. This eliminates the need to parse conversation histories, rebuild context from scratch, or lose state when errors occur. Modus provides a complete toolkit for building intelligent applications:
  • Functions: Stateless operations that automatically become shareable skills via auto-generated APIs
  • Agents: Stateful entities with short-term and long-term memory that coordinate models, tools, and data
  • Models: Domain-specific AI models with the ability to easily swap in different providers or versions
  • Knowledge Graphs: Organizational memory that scales context across multi-agent architectures
Built-in observability provides automatic inference logging and tracing, while secure-by-default authorization ensures risk-appropriate access to tools and data. Following modern best practices for AI-native architectures, Modus implements principles from the 12-factor agentic app methodology for maintainable, scalable intelligent systems. You can run Modus locally for development or deploy it in seconds to Hypermode for production.

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When to use Modus

Modus is designed for building applications where AI is at its core capability. It supports sub-second response times for stateless operations and long-running, autonomous workflows that maintain state over time. Beyond demo prompt apps: we’ve all built apps with prompts and AI tool integrations. When you’re ready to take your project to the next level, Modus serves as your AI component in the stack. Modus can sit right alongside your existing app, handling the intelligent workflows while your main app focuses on what it does best. Both functions and agents can be deployed in the same app, allowing you to choose the right abstraction for each use case.

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Language-agnostic logic, safely

With WebAssembly’s secure isolation environment, define agent behavior in Go or AssemblyScript. Compile to WebAssembly and Modus runs it securely. Each agent runs as a lightweight actor: self-contained, message-driven, and supervised by the runtime.

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Persistent context beyond sessions

For use-cases like multi-day workflows, personal assistants, tutoring, or domain-specific agents (for example ticketing systems), long-term context is crucial. Modus provides it without requiring a dedicated database layer. Modus’ built-in short-term memory handles conversational state and context within agents. Connect to long-term graph memory for externalized and persisted, but serverless-friendly memory. You gain full “recall” - across sessions and workflows- without maintaining stateful servers.

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Where to next?

Quickstart

Build your first Modus app in minutes with our quickstart guide

What is a Function?

Learn about stateless functions for APIs and data processing

What is an Agent?

Discover stateful agents that maintain memory across interactions

What about knowledge graphs?

Build intelligence networks with persistent institutional memory