THE MONOREPO FOR AGENT-BUILT PRODUCTS

Harness as Code.

MonoKit turns architecture, integrations, guardrails, and agent context into a versioned product harness, so teams can build fast without rebuilding the operating system around every app.

committed

Agent context

committed

Shared packages

committed

Typed data

committed

Deploy targets

monokit.harness.ts

Harness as Code

The repo is the operating model.

MonoKit captures the decisions around your product, not only the screen you are shipping today. That durable structure is the harness your team and its agents build inside.

monokit.harness.tstyped

export const harness = defineHarness({
  surfaces: ["core", "web", "mobile", "extension"],
  capabilities: ["ai", "auth", "cms", "data", "email", "storage", "ui"],
  boundaries: "workspace",
  agentContext: {
    policy: "versioned",
    files: ["AGENTS.md", ".github/instructions/*"],
  },
});

4

surfaces

7

capabilities

4

checks

Declare the product system

Apps, packages, providers, environments, and guardrails live in one inspectable contract.

Give agents real context

The harness makes boundaries and safe operations legible before an agent changes code.

Change providers, not structure

Swap integrations behind stable package boundaries without teaching every surface a new system.

Production capabilities

A complete harness, not a pile of starters.

Keep the hard-won architecture and replace only what makes your product distinct.

UI Components

50+ production-ready UI components built for real-world applications. Accessible, customizable, and thoroughly tested for all use cases.

Instant Theming

Transform your app's look with powerful theming that respects dark mode preferences. Apply brand colors and custom styling in minutes, not days.

Multi-Auth Strategy

Implement secure authentication with multiple providers including OAuth, JWT, and magic links. Preconfigured with Better Auth.

Transactional Email

Beautiful, responsive email templates with React Email. Ready-to-use flows for verification, password reset, and notifications via AWS SES.

Revenue Engine

Complete payment infrastructure with subscription management, invoicing, and global tax handling. Powered by Polar.

Type-Safe Data

Interact with your database through a strongly-typed ORM. Automatic migrations, connection pooling, and performance optimization with Prisma.

Hosting

Zero-configuration deployments to Vercel, Cloudflare, or AWS with built-in CI/CD. Optimized Docker images for maximum flexibility.

Secure Storage

Enterprise-grade blob storage with AWS S3 integration. Presigned URLs, access control, and client-side uploads with compression and previews.

Headless CMS

Integrated content management with Sanity. Real-time editing, powerful querying, and seamless deployment of structured content across platforms.

Monorepo Structure

Modular architecture with Turborepo for optimal developer experience. Share code, maintain consistency, and deploy independently.

AI Integration

Ready-to-use AI components for chat, completions, and embeddings. Easily connect to popular AI providers with minimal configuration.

Developer Experience

Optimized DX with TypeScript, Biome, and Husky. Consistent coding standards and automated QA across your entire codebase.

Testing

Comprehensive testing suite with Vitest, Testing Library, and Playwright. Write unit, integration, and e2e tests with confidence.

Analytics

Track user behavior and application performance with built-in analytics. Identify issues before they impact your users.

Open Architecture

Replace any part of the stack with your preferred tools. MonoKit is designed to evolve with your needs, not lock you in.

Integrated stack

Proven parts, already wired.

Production tools connected through stable package boundaries.

Legible by default

Structure an agent can reason about.

Clean workspace boundaries help developers and coding agents find the right surface, reuse shared capabilities, and avoid accidental coupling.

monokit.harness.ts

AGENTS.md

.gitignore

.env.keys

biome.json

package.json

pnpm-workspace.yaml

turbo.json

Clear before checkout

Harness as Code.