Open Skills Logo
Open Skills

projection-patterns

Build read models and projections from event streams. Use when implementing CQRS read sides, building materialized views, or optimizing query performance in event-sourced systems.

View Source
name:projection-patternsdescription:Build read models and projections from event streams. Use when implementing CQRS read sides, building materialized views, or optimizing query performance in event-sourced systems.

Projection Patterns

Comprehensive guide to building projections and read models for event-sourced systems.

Use this skill when

  • Building CQRS read models

  • Creating materialized views from events

  • Optimizing query performance

  • Implementing real-time dashboards

  • Building search indexes from events

  • Aggregating data across streams

    • Do not use this skill when

  • The task is unrelated to projection patterns

  • You need a different domain or tool outside this scope

    • Instructions

  • Clarify goals, constraints, and required inputs.

  • Apply relevant best practices and validate outcomes.

  • Provide actionable steps and verification.

  • If detailed examples are required, open resources/implementation-playbook.md.

    • Resources

  • resources/implementation-playbook.md for detailed patterns and examples.