Rei-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.

install

source · Clone the upstream repo

git clone https://github.com/rootcastleco/rei-skills

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/rootcastleco/rei-skills "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/projection-patterns" ~/.claude/skills/rootcastleco-rei-skills-projection-patterns && rm -rf "$T"

manifest: skills/projection-patterns/SKILL.md

source 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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