Today we’re releasing Loopstack v0.15, a major architectural update that makes Loopstack feel truly native to NestJS - while significantly improving developer experience, type safety, and testability. This release removes framework-specific complexity and embraces standard NestJS patterns throughout.

Native NestJS Dependency Injection

Loopstack no longer relies on a custom factory service.

• Factory services are removed
• Modules behave like standard NestJS modules
• Dependency injection is handled entirely by NestJS’s DI system

If you know NestJS, Loopstack now feels immediately familiar.

New Dependency Injection Model for Blocks

The old import config for blocks has been deprecated in favor of native DI. We’ve introduced new decorators to make dependencies explicit and type-safe:

• @Workflow()
• @Tool()
• @Document()

Dependencies can be injected using standard constructors or these decorators (recommended), improving readability and maintainability.

Arguments with @WithArguments

Arguments are no longer defined in block configs. Instead, use the new @WithArguments decorator:

• Defined with Zod schemas
• Provides compile-time type safety
• Works across workflows, tools, and documents

Workflow State with @WithState

Workflow state is now defined separately using the new @WithState decorator:

• State is defined via Zod schemas
• Workflows themselves are now stateless

This enables a cleaner separation of concerns and more predictable execution.

Helper Methods in Templates

With the new @Helper decorator, you can expose TypeScript methods directly to YAML templates:

• Call helpers from templates
• Move complex logic out of YAML

Leaner Core & Better Testing

Loopstack core has been streamlined:

• Smaller, more focused core
• Tools and documents moved into separate packages
• Modular, opt-in functionality

We’ve also added first-class testing utilities:

• Test full workflow state machines
• Assert tool calls and transitions
• Validate automation logic with confidence

Getting Started

Loopstack 0.15 is a big step toward a more intuitive, NestJS-native framework for AI automations. Check the updated documentation for migration guidance and examples. We’re excited to see what you build with it.

— Your Loopstack Team