⚡ A3 Stack — AI + Agents + Automation

A production-ready full-stack monorepo scaffolding tool.

Stack: Next.js · NestJS · Drizzle ORM · Nestia · Mastra · Agentica · Temporal · Kafka

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Quick Start

npx create-a3-stack

Or with pnpm:

pnpm dlx create-a3-stack

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Interactive Prompts

Prompt	Options
Frontend	Next.js 15 · React + Vite + TanStack Router
Database	PostgreSQL · MySQL · MariaDB
Queue	BullMQ (Redis) · Temporal · None
Agents	Mastra + Agentica · None
Kafka	Yes (2 microservices) · No (single API)
Auth	Better Auth · None
Package manager	pnpm · npm

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Generated Monorepo Layout

my-project/
├── apps/
│   ├── api/          # NestJS API runner
│   ├── web/          # Next.js or React+Vite frontend
│   └── worker/       # Kafka microservice (if enabled)
├── packages/
│   ├── api/          # NestJS business logic
│   ├── db/           # Drizzle schema + migrations
│   ├── i18n/         # Shared message catalogs
│   ├── sdk/          # Nestia-generated typed API client
│   └── worker/       # Kafka consumer logic (if enabled)
├── nestia.config.ts  # Nestia SDK + OpenAPI config
├── docker-compose.yml
└── .env.example

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Development

cd my-project
cp .env.example .env
docker compose up -d
pnpm install
pnpm dev

• API: http://localhost:3000/api
• Web: http://localhost:5173 (Vite) or http://localhost:3001 (Next.js)
• Kafka UI: http://localhost:8081 (if Kafka enabled)
• Temporal UI: http://localhost:8080 (if Temporal enabled)

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SDK / OpenAPI (Nestia)

After changing API routes:

pnpm openapi:export

Generates typed SDK in packages/sdk/src and OpenAPI spec at apps/api/openapi/openapi.json.

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Database

pnpm db:generate   # generate migrations
pnpm db:migrate    # apply migrations
pnpm db:push       # push schema (dev)
pnpm db:studio     # Drizzle Studio

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Kafka Mode

When Kafka is selected, two NestJS apps are scaffolded:

• apps/api — HTTP API (publishes events via Kafka)
• apps/worker — Kafka microservice consumer (Transport.KAFKA)

pnpm dev:api     # start HTTP API
pnpm dev:worker  # start Kafka worker

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Tech Stack

Layer	Technology
Frontend	Next.js 15 / React + Vite + TanStack Router
Backend	NestJS 11
ORM	Drizzle ORM
Database	PostgreSQL / MySQL / MariaDB
Queue	BullMQ / Temporal
Agents	Mastra + Agentica
Messaging	Kafka (NestJS Microservices)
API Client	Nestia (typed SDK + OpenAPI)
Auth	Better Auth