What is the primary benefit of Event Modeling?

The primary benefit is 'not losing information.' By storing immutable facts (events) rather than just the current state, systems preserve their full history for auditing and business intelligence.

Can I use this for existing CRUD systems?

Yes, it is an excellent tool for modeling new features or refactoring existing modules where the business logic has become too complex for simple state updates.

What are the four event patterns used by this skill?

It utilizes State Change (Command to Event), State View (Events to Read Model), Automation (Event to Command via Read Model), and Translation (External Data to Internal Event).

How does this skill assist in the design process?

It provides a structured facilitation framework, prompting users with specific questions to reveal hidden domain logic and ensuring all seven steps of the workflow design are followed.

Does this skill require specific technical knowledge?

No, it focuses on business language and domain behavior, making it accessible to both developers and domain experts without discussing database schemas or specific APIs.

Event Modeling Facilitator

Name: Event Modeling Facilitator
Author: jwilger

byjwilger

•

API Development

Facilitates the design of event-sourced systems using the Event Modeling methodology to ensure zero information loss and shared domain understanding.

The Event Modeling skill empowers Claude to act as a specialized facilitator for designing systems through immutable event streams. Based on the methodology of revealing domain knowledge through structured conversation, it guides users through a two-phase process: broad domain discovery followed by a rigorous seven-step workflow design. By enforcing core principles like past-tense event naming and the four fundamental event patterns—State Change, State View, Automation, and Translation—this skill helps developers and stakeholders bridge the gap between business requirements and technical architecture while ensuring a complete audit trail of all system state changes.

Key Features

01Rigorous seven-step workflow modeling for domain clarity

027 GitHub stars

03Identification of hidden business logic through 'And then what?' facilitation

04Standardized event naming conventions using business language

05Guided two-phase discovery and design process

06Implementation of the four core event patterns (State Change, State View, Automation, Translation)

Use Cases

01Designing complex business domains where audit trails and historical state are critical

02Transitioning from traditional CRUD-based state management to event-sourced architectures

03Facilitating shared understanding between technical teams and non-technical business experts

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jwilger/claude-code-plugins event-modeling

For use in Claude.ai and ChatGPT

Download Skill