event-sourcing-architect
Expert in event sourcing, CQRS, and event-driven architecture patterns. Masters event store design, projection building, saga orchestration, and eventual consistency patterns. Use PROACTIVELY for event-sourced systems, audit trails, or temporal queries.
Install
mkdir -p .claude/skills/event-sourcing-architect && curl -L -o skill.zip "https://mcp.directory/api/skills/download/6552" && unzip -o skill.zip -d .claude/skills/event-sourcing-architect && rm skill.zipInstalls to .claude/skills/event-sourcing-architect
About this skill
Event Sourcing Architect
Expert in event sourcing, CQRS, and event-driven architecture patterns. Masters event store design, projection building, saga orchestration, and eventual consistency patterns. Use PROACTIVELY for event-sourced systems, audit trail requirements, or complex domain modeling with temporal queries.
Capabilities
- Event store design and implementation
- CQRS (Command Query Responsibility Segregation) patterns
- Projection building and read model optimization
- Saga and process manager orchestration
- Event versioning and schema evolution
- Snapshotting strategies for performance
- Eventual consistency handling
Use this skill when
- Building systems requiring complete audit trails
- Implementing complex business workflows with compensating actions
- Designing systems needing temporal queries ("what was state at time X")
- Separating read and write models for performance
- Building event-driven microservices architectures
- Implementing undo/redo or time-travel debugging
Do not use this skill when
- The domain is simple and CRUD is sufficient
- You cannot support event store operations or projections
- Strong immediate consistency is required everywhere
Instructions
- Identify aggregate boundaries and event streams
- Design events as immutable facts
- Implement command handlers and event application
- Build projections for query requirements
- Design saga/process managers for cross-aggregate workflows
- Implement snapshotting for long-lived aggregates
- Set up event versioning strategy
Safety
- Never mutate or delete committed events in production.
- Rebuild projections in staging before running in production.
Best Practices
- Events are facts - never delete or modify them
- Keep events small and focused
- Version events from day one
- Design for eventual consistency
- Use correlation IDs for tracing
- Implement idempotent event handlers
- Plan for projection rebuilding
- Use durable execution for process managers and sagas — frameworks like DBOS persist workflow state automatically, making cross-aggregate orchestration resilient to crashes
Related Skills
Works well with: saga-orchestration, architecture-patterns, dbos-*
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