# drumr®

> Enterprise apps your coding agent gets right.

## What is drumr?

drumr is a model-driven TypeScript framework for building enterprise applications with AI coding agents. Developers (and their agents) declare data models and actions once; drumr supplies the GraphQL API, MCP tools, permissions, durable workflows, and UI. The framework is licensed Apache 2.0. The public repository and npm packages launch with the first drumr Harness; until then the framework is available through early access at https://www.drumr.ai.

## Core concept

drumr sits on Express, TypeORM, Apollo GraphQL, and DBOS and replaces the wiring between them with one declarative layer. A higher level of abstraction means fewer decisions for a coding agent to get wrong: agents produce idiomatic, well-structured apps from short prompts, and reviews stay short.

## Framework features

- **Data models**: `@DataModel` classes with 25 field types (TextField, ChoiceField, MoneyField, RelationshipField, VectorField, …). Validation, persistence, and schema come from the declaration; migrations are an explicit TypeORM chain scaffolded by the CLI. PostgreSQL in production, SQLite for local development.
- **Actions**: typed `ObjectAction` classes with declarative preconditions, executed in database transactions with optimistic locking.
- **GraphQL API + typed SDK**: generated for every model and action; filters and relationship traversal included.
- **MCP server**: actions marked `api: ['mcp']` become permission-filtered MCP tools behind OAuth 2.1.
- **Durable workflows**: `@Workflow`, `@Step`, and queues on DBOS.
- **Security**: Google, Microsoft, Auth0, or local login; MFA; fine-grained permissions; sensitive fields encrypted at rest.
- **AI agents in your app**: `@Agent` classes using actions as tools, human-approval steps, built-in evaluation (LLM judges, trajectory checks).
- **Layered frontend**: typed SDK → headless React hooks → Ant Design components → full scaffold.
- **Operations**: OpenTelemetry tracing, audit trail, distributed locks, keyword/vector/hybrid search.
- **CLI (`@drumr/cli`)**: `drumr create-app`, `setup`, `run`, `infra up`, `tests open`, `cloud deploy` (Google Cloud via Pulumi).

## Built for coding agents

- 50+ drumr agent skills ship with the framework and are installed into every app by `drumr setup`.
- Every new app gets a generated AGENTS.md.
- Works with any coding agent: Claude Code, GitHub Copilot, Cursor, and others. Skills are plain files in the repo.

## drumr harnesses (coming soon, commercial)

- **drumr Harness**: a general orchestrator for coding agents building drumr apps — spec, clarify, plan, tasks, build, verify, document — producing code, tests mapped to acceptance criteria, and documentation.
- **Vertical harnesses**: the drumr Harness plus domain expertise. LIMS (laboratory information management) first, then Manufacturing.

The framework is free and open source (Apache 2.0); harnesses are paid.

## Technology

- Language: TypeScript; Runtime: Node.js
- Underlying frameworks: Express, TypeORM, Apollo GraphQL, DBOS; frontend React + Ant Design
- License: Apache 2.0 (the license grants no rights to the drumr name or logo)
- Packages: @drumr/backend, @drumr/frontend, @drumr/cli

## Who builds drumr?

drumr is built and stewarded by Slingr (https://slingr.io), a services company that builds and runs enterprise apps on drumr. drumr® is a registered trademark of Idea2 Ltd. (dba Slingr).

## Comparison context

drumr is in the same category as NestJS, RedwoodJS, Blitz.js, and Wasp, but works at a higher level of abstraction (decorator-based models, generated API/MCP/UI, built-in permissions and workflows) and is designed first for AI coding agents.

## Links

- Website: https://www.drumr.ai
- Full content for agents: https://www.drumr.ai/llms-full.txt
- Homepage as Markdown: https://www.drumr.ai/index.md
- Built by: https://slingr.io