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claude-codedevelopment

Claude-skill-registry kurrentdb

Provides KurrentDB (EventStoreDB) client code for event sourcing and CQRS. Generates correct package names, connection strings, and API patterns for Python, Node.js, .NET, F#, Go, Java, Rust. Triggers on "kurrentdb", "eventstore", "event sourcing", "append events", "read stream", "subscription", "aggregate", "CQRS".

install
source · Clone the upstream repo
git clone https://github.com/majiayu000/claude-skill-registry
Claude Code · Install into ~/.claude/skills/
T=$(mktemp -d) && git clone --depth=1 https://github.com/majiayu000/claude-skill-registry "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/data/kurrentdb" ~/.claude/skills/majiayu000-claude-skill-registry-kurrentdb && rm -rf "$T"
manifest: skills/data/kurrentdb/SKILL.md
tags
#event-sourcing#cqrs#database-client#kurrentdb#eventstore#api-generation
source content

KurrentDB Development Skill

Provides working code for KurrentDB (formerly EventStoreDB) - the event-native database.

When to Read Additional Files

NeedRead
Full API reference for any language
reference.md
Ready-to-run project templates
templates/{language}/

Quick Reference

Docker Setup (Insecure Single Node)

docker run --name kurrentdb-node -it -p 2113:2113 \
    docker.kurrent.io/kurrent-latest/kurrentdb:latest \
    --insecure --run-projections=All --enable-atom-pub-over-http

Or use docker-compose - see 

templates/docker-compose.yaml

Connection String: 

kurrentdb://localhost:2113?tls=false
Web UI: http://localhost:2113

Client Installation Quick Reference

LanguageInstall Command
.NET/C#
dotnet add package KurrentDB.Client
F#
dotnet add package KurrentDB.Client
JavaAdd 
com.eventstore:db-client-java:5.3.2
to pom.xml
Python
pip install kurrentdbclient
Node.js
npm install @kurrent/kurrentdb-client
Go
go get github.com/kurrent-io/KurrentDB-Client-Go/kurrentdb
RustAdd 
kurrentdb = "1.0"
to Cargo.toml

Key API Patterns

Optimistic Concurrency (CRITICAL)

ALWAYS use expected revision for aggregates:

  • NO_STREAM
    - Creating new aggregate (stream must not exist)
  • StreamExists
    - Appending to existing stream
  • Specific revision number - Prevent concurrent modifications

Subscriptions

  • Catch-up: Read history + live events. Use for projections.
  • Persistent: Server-managed with ACK/NACK. Use for reliable processing.

System Streams

  • $ce-{category}
    - All events from streams matching pattern (e.g., 
    $ce-order
    for 
    order-*
    )
  • $et-{eventType}
    - All events of a type (e.g., 
    $et-OrderCreated
    )

Official Documentation