slice-builder

name	slice-builder
description	Transform slice definitions from config.json into C# code using Wolverine + Marten (Critter Stack)

Slice Builder - Master Skill

Overview

Transform slice definitions from config.json into C# code following CQRS/Event Sourcing patterns with the Critter Stack (Wolverine + Marten).

Input: config.json

{
  "slices": [
    {
      "title": "slice: <Name>",
      "context": "<BoundedContext>",
      "sliceType": "STATE_CHANGE|STATE_VIEW|UNDEFINED",
      "commands": [...],
      "events": [...],
      "readmodels": [...],
      "processors": [...],
      "specifications": [...]
    }
  ]
}

Slice Type Selection

sliceType	Skill	Generates
STATE_CHANGE	state-change-slice	Command record, Event record, Aggregate, HTTP endpoint (POST), Tests
STATE_VIEW	state-view-slice	ReadModel document, Projection, Query endpoint (GET), Tests
TRANSLATION	translation-slice	External message type, Translator handler, Internal event, Tests
UNDEFINED	Skip	-

If slice contains processors with type: "AUTOMATION", also apply automation-slice.

4 Slice Patterns

Pattern	Trigger	Output	Use when
STATE_CHANGE	User command	Domain event appended	User/UI changes aggregate state
STATE_VIEW	Domain event	Read model updated	Building a queryable projection
AUTOMATION	Internal event	Internal command emitted	Choreography within the domain
TRANSLATION	External event/message	Internal domain event	Bridging another system/context (ACL)

Project Structure

SlicingWorkshop/
├── Common/                          # Shared interfaces
│   ├── ICommand.cs
│   ├── IEvent.cs
│   ├── IQuery.cs
│   ├── IReadModel.cs
│   ├── IProcessor.cs
│   └── CommandResult.cs
├── Domain/                          # Aggregates and Commands
│   ├── <Aggregate>.cs
│   └── Commands/
│       └── <CommandName>.cs
├── Events/                          # All events (shared across contexts)
│   └── <EventName>.cs
├── Integrations/
│   └── <SourceSystem>/
│       └── <ExternalEventName>.cs           # External message types (TRANSLATION)
└── <Context>/
    └── Slices/
        └── <SliceName>/
            ├── <SliceName>Endpoint.cs       # Wolverine HTTP endpoint
            ├── <SliceName>ReadModel.cs      # Marten document (STATE_VIEW)
            └── Internal/
                ├── <SliceName>Projection.cs   # Marten projection (STATE_VIEW)
                ├── <SliceName>Processor.cs    # Automation processor
                └── <SliceName>Translator.cs   # External→internal translator (TRANSLATION)

File Locations

Type	Location
Commands	Domain/Commands/<CommandName>.cs
Events	Events/<EventName>.cs
Aggregates	Domain/<Aggregate>.cs
Slice artifacts	<Context>/Slices/<SliceName>/
Internal (Projection, Processor)	<Context>/Slices/<SliceName>/Internal/
Tests	<Context>/Slices/<SliceName>/Tests/

Field Type Mapping

config.json Type	C# Type
UUID	Guid
String	string
Date	DateOnly
Integer	int
Boolean	bool
Decimal	decimal
Multiple cardinality	List
optional: true	T?

Name Transformations

Slice Title	Class Name	Folder Name
"Register Customer"	RegisterCustomer	RegisterCustomer
"Customer Registered"	CustomerRegistered	CustomerRegistered

Rules:

1. Remove "slice: " prefix
2. PascalCase for class names and folder names
3. Append suffix where needed: no suffix for commands/events (they are records)