sinon

Authoring kit for Claude Code plugins, agents, commands/prompts, and cross-platform Agent Skills.

Java development plugin with practical skills for LTS syntax boundaries, foundational java.base guidance, language design, testing workflows, dependency decisions, performance analysis, and JDTLS-assisted editing.

JVM development assistant with shared skills for tooling workflows, runtime diagnostics, and garbage-collection guidance.

Kotlin development plugin with practical skills for idiomatic language design, coroutines and Flow decisions, Kotlin testing workflows, and kotlin-lsp-assisted editing.

Netty and Reactor Netty skills for building high-performance network applications with non-blocking I/O.

Prometheus and Grafana plugin with practical skills for PromQL, alert-rule authoring, alert-rule testing, Alertmanager routing, dashboard JSON authoring, and dashboard provisioning for version-controlled observability assets.

Project Reactor skills for reactive programming with Flux, Mono, operators, schedulers, sinks, and reactor-test.

Spec-first workflow: research unknowns, write abstract requirements in SPEC.md, get approval, implement, verify completeness.

Spring development plugin with practical skills for Spring Boot, Web, Data, transactions, observability, Batch, Integration, Cloud, and Kafka workflows.