Sinon is a universal AI plugin marketplace repository.
This repository uses the official marketplace paths for Claude Code and Codex, with plugins stored under plugins/.
Purpose
- Publish curated marketplace catalogs from a Git repository.
- Represent plugins for multiple AI runtimes without splitting plugin source trees.
- Store installable plugin packages in a consistent directory layout.
- Keep runtime-specific marketplace metadata and plugin manifests aligned.
Repository Structure
README.md: repository overview and contribution context..gitignore: development ignore rules..markdownlint.jsonc: Markdown lint configuration..claude-plugin/marketplace.json: Claude marketplace catalog..agents/plugins/marketplace.json: Codex marketplace catalog.plugins/: plugins maintained in this repository.
Marketplace Layout
Plugins are stored under plugins/.
Each plugin directory can expose one or more runtime manifests from the same plugin root.
.claude-plugin/plugin.json: Claude plugin manifest..codex-plugin/plugin.json: Codex plugin manifest.
Optional plugin assets such as README.md, .mcp.json, .app.json, commands/, agents/, skills/, and assets/ live beside those manifests at the plugin root.
The repository keeps separate official marketplace catalogs per runtime.
Current Plugins
This list describes the plugins currently published through the repository marketplace catalogs.
plugins/git-workflow: Git workflow plugin with practical guidance for commit readiness, Conventional Commit drafting, staged-change hygiene, and template-aware GitHub pull request or GitLab merge request body drafting.plugins/java: Java development plugin with practical skills for syntax boundaries, language design, testing workflows, dependency decisions, performance analysis, and JDTLS-assisted editing.plugins/jvm: JVM development assistant with shared skills for tooling workflows, runtime diagnostics, and garbage-collection guidance.plugins/kotlin: Kotlin development plugin with practical skills for idiomatic language design, coroutines and Flow decisions, Kotlin testing workflows, and kotlin-lsp-assisted editing.plugins/spring: Spring development plugin with practical skills for Spring Boot, Web, Data, transactions, observability, Batch, Integration, Cloud, and Kafka workflows.plugins/observability-assets: Prometheus and Grafana plugin with practical skills for alert-rule design, recording-rule support, promtool validation, dashboard JSON authoring, and Grafana mixin workflows for version-controlled observability assets.plugins/reactor: Project Reactor plugin with practical skills for Flux and Mono composition, scheduler selection, Sinks and ConnectableFlux hot-source design, and reactor-test workflows with StepVerifier, TestPublisher, PublisherProbe, and virtual time.plugins/netty: Netty and Reactor Netty plugin with practical skills for high-performance network applications, bootstrap and pipeline design, ByteBuf and codec handling, and reactive HTTP/TCP/UDP workflows with Reactor Netty.
Publishing Model
.claude-plugin/marketplace.json is the Claude marketplace catalog.
.agents/plugins/marketplace.json is the Codex marketplace catalog.
Individual plugin directories remain the source of truth for plugin-specific runtime manifests and bundled assets.
Bundled upstream plugins may support only a subset of runtimes. In some cases, this repository may add minimal runtime metadata such as .codex-plugin/ while leaving the upstream plugin content otherwise intact.
Registering This Marketplace in Claude Code
Claude Code supports registering marketplaces from GitHub repositories, generic git URLs, direct URLs to marketplace.json, and local paths.
For this repository, use a GitHub repository, git URL, or local path. Sinon currently uses relative plugin sources such as ./plugins/java inside .claude-plugin/marketplace.json, so a direct HTTP URL to the catalog file is not a safe distribution path for this marketplace.
The Claude marketplace catalog for this repository is:
.claude-plugin/marketplace.json
Interactive registration
Register this marketplace from a local checkout:
/plugin marketplace add /path/to/sinon
Register this marketplace from GitHub:
/plugin marketplace add ririnto/sinon
Register this marketplace from a generic git URL:
/plugin marketplace add https://github.com/ririnto/sinon.git
After Claude Code registers the sinon marketplace, install a plugin from it with:
/plugin install <plugin>@sinon
Examples: