Production-Ready Open Source Agent Stack

A complete developer infrastructure for building AI agents that can reason, remember, and ship frontend code. Mastra handles agent orchestration and multi-step workflows, Cognee gives those agents persistent structured memory that improves over time, and Stagewise closes the loop by letting you visually iterate on the frontend your agents are building. The go-to stack for TypeScript developers and technical founders who want production-grade agents without paying for managed platforms or proprietary memory services.

The workflow — 3 agents in sequence

1

Mastra

Agent orchestration and workflow engine

Open-source TypeScript framework for building, testing, and deploying AI agents and multi-agent workflows — from prototype to production.

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Mastra defines the agent loop, tools, and multi-step workflow logic — then passes execution context and results into Cognee for persistent storage

2

Cognee

Persistent memory and knowledge graph

Open-source knowledge engine that gives AI agents persistent, self-improving memory using a hybrid graph and vector architecture.

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Cognee stores what the agent learns across sessions as a structured knowledge graph — feeding relevant context back into Mastra on each run so the agent gets smarter over time

3

Stagewise

Visual frontend coding and iteration

Open-source frontend coding agent that lives in your browser — click on any element, describe the change, and it edits your local codebase directly.

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