dev-skills

assistants

This repository is not production software. It is a reference collection of sample plugins, skills, and personas for exploring how Agent Skills, Claude Code plugins, Cursor plugins, and plugin marketplaces work together across multiple AI coding tools. Use it to learn, experiment, and as a starting point for your own configurations.

Nothing here is guaranteed to be complete, stable, or suitable for any particular use. Skills and plugins may contain placeholder logic, opinionated patterns, or personal workflow assumptions.

What This Repository Demonstrates

• Cross-vendor plugins — Each plugin carries both .claude-plugin/ and .cursor-plugin/ manifests, making it usable from either tool's marketplace
• Portable skills — Skills follow the agentskills.io specification, the open standard adopted by Claude Code, Cursor, Codex, GitHub Copilot, and others
• Dual marketplace — The repo serves as both a Claude Code marketplace and a Cursor team marketplace from the same GitHub repository
• Vendor-neutral instructions — AGENTS.md files provide project context for Codex and Cursor alongside CLAUDE.md for Claude Code
• Persona composition — How ynh personas reference and compose skills from shared libraries (ynh/)

Repository Structure

assistants/
├── .claude-plugin/
│   └── marketplace.json          # Claude Code marketplace index
├── .cursor-plugin/
│   └── marketplace.json          # Cursor marketplace index
├── AGENTS.md                     # Codex/Cursor project instructions
├── plugins/
│   └── media-management/         # Self-contained plugin (skills, agents, hooks, tests)
│       ├── .claude-plugin/plugin.json
│       ├── .cursor-plugin/plugin.json
│       ├── .claude/CLAUDE.md     # Claude Code instructions
│       └── AGENTS.md             # Codex/Cursor instructions
├── skills/
│   ├── dev/                      # Development workflow plugin (7 skills)
│   │   ├── .claude-plugin/plugin.json
│   │   ├── .cursor-plugin/plugin.json
│   │   └── skills/
│   │       ├── dev-project/
│   │       ├── dev-quality/
│   │       ├── dev-review/
│   │       ├── dev-backend/
│   │       ├── dev-ui/
│   │       ├── dev-debug/
│   │       └── dev-security/
│   ├── tech/                     # Language-specific plugin (2 skills)
│   │   ├── .claude-plugin/plugin.json
│   │   ├── .cursor-plugin/plugin.json
│   │   └── skills/
│   │       ├── go-lang/
│   │       └── java-lang/
│   ├── infra/                    # Infrastructure plugin (2 skills)
│   │   ├── .claude-plugin/plugin.json
│   │   ├── .cursor-plugin/plugin.json
│   │   └── skills/
│   │       ├── gh-os-repo/
│   │       └── terraform-backend-aws/
│   └── pause/                    # Conversational alignment plugin (2 skills)
│       ├── .claude-plugin/plugin.json
│       ├── .cursor-plugin/plugin.json
│       └── skills/
│           ├── help-me-answer/
│           └── take-a-moment/
└── ynh/                          # Personas (compose skills via includes)
    ├── david/
    ├── planner/
    ├── tester/
    └── researcher/

Using the Marketplace

Claude Code

/plugin marketplace add eyelock/assistants
/plugin install dev-skills@eyelock-assistants

Test locally:

claude --plugin-dir ./skills/dev

Cursor (Teams/Enterprise)

Import this repo as a team marketplace via Dashboard > Settings > Plugins, then team members install from the plugin manager.

Individual users can test locally by copying a plugin to ~/.cursor/plugins/local/.

Codex

Copy skills directly:

cp -r skills/dev/skills/dev-project ~/.agents/skills/

Or install via the built-in skill installer:

$skill-installer dev-project

Marketplace Plugins

Plugin	Skills	Description
media-management	7	Process downloaded music purchases: extract, tag, import to Apple Music, stage to NAS
dev-skills	7	Project setup, code quality, review, debugging, backend, UI, and security patterns
tech-skills	2	Go and Java development workflows
infra-skills	2	GitHub repository setup, Terraform backend provisioning
pause-skills	2	Guided elicitation and context checkpoints for alignment

Cross-Vendor Compatibility

Layer	Claude Code	Cursor	Codex
Skills (SKILL.md)	Native	Native	Native
Plugin manifest	.claude-plugin/plugin.json	.cursor-plugin/plugin.json	N/A
Marketplace	.claude-plugin/marketplace.json	.cursor-plugin/marketplace.json	N/A
Instructions	.claude/CLAUDE.md	AGENTS.md, .cursor/rules/	AGENTS.md
MCP servers	.mcp.json	.mcp.json	config.toml
Custom repos	Any user	Teams/Enterprise	Manual install