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projection-patterns

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Description

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.

Tool Access

This skill uses the workspace's default tool permissions.

Skill Content

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.
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Last CommitFeb 19, 2026

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