SimpleCORE Skills

A collection of Claude Code skills maintained by SimpleCORE Inc., distributed as a plugin marketplace. Each skill is packaged as an independent plugin so you can install only what you need.

Available Plugins

Plugin	Components	Description
svg-diagrams	skill	Create diagrams as SVG or ASCII — flowcharts, sequence/state/class/ER diagrams, system architecture, pipelines, and network layouts. Includes JSON-spec auto-layout, Mermaid conversion, and a render audit script that catches missing arrowheads, text overflow, and clipped content.
korean-docs	skill, /glossary-audit command, PostToolUse hook	Korean output standards for all deliverables — writing, translation, proofreading, and glossary (GLOSSARY.md) management. Ships a base glossary, a style reference catalog, an automated glossary audit script, a slash command that drives audits to zero errors, and a hook that audits Markdown and SVG files as they are written.
ignite3	skill	Apache Ignite 3 reference — SQL (DDL/DML/grammar/data types/functions), client APIs (Java/JDBC/.NET/C++), table/transaction/compute/streaming APIs, cluster configuration, operations, and architecture.

Requirements

• Claude Code 2.x
• Node.js 18+ — used by the korean-docs audit tooling and the svg-diagrams layout/conversion scripts
• Python 3 — used by the svg-diagrams render audit script

Installation

Add the marketplace, then install the plugins you want.

Inside a Claude Code session:

/plugin marketplace add simplecore-inc/simplecore-skills
/plugin install svg-diagrams@simplecore-skills
/plugin install korean-docs@simplecore-skills
/plugin install ignite3@simplecore-skills

Or from the terminal:

claude plugin marketplace add simplecore-inc/simplecore-skills
claude plugin install svg-diagrams@simplecore-skills
claude plugin install korean-docs@simplecore-skills
claude plugin install ignite3@simplecore-skills

Restart your Claude Code session to load the installed components. Commands and hooks register automatically with the plugin — no manual configuration is needed.

Updating

Fetch the latest marketplace metadata, then update installed plugins:

claude plugin marketplace update simplecore-skills
claude plugin update svg-diagrams
claude plugin update korean-docs
claude plugin update ignite3

A restart is required for updates to take effect.

korean-docs: Command and Hook

/glossary-audit command

Runs the Korean glossary audit for the current project and drives it to zero errors.

/glossary-audit                # audit.paths from the glossary front matter, else project-wide
/glossary-audit docs/ README.md
/glossary-audit --all --strict
/glossary-audit --untranslated # also flag remaining English prose (translation projects)

Markdown audit hook

The plugin registers a PostToolUse hook that audits every Markdown file Claude writes or edits. The hook activates automatically when the plugin is installed; there is nothing to configure.

Scope guard: the hook runs only in projects that have a project glossary — .claude/GLOSSARY.md (default location) or GLOSSARY.md, discovered by walking up from the edited file to the git boundary. Projects without a glossary never see any output. To opt a project in, run /glossary-audit once — it offers to create .claude/GLOSSARY.md from the bundled template when none exists.

When the hook finds violations, the report is fed back to Claude, which fixes them and continues.

Repository Layout

simplecore-skills/
├── .claude-plugin/
│   └── marketplace.json           # Marketplace manifest listing the three plugins
├── plugins/
│   ├── svg-diagrams/
│   │   ├── .claude-plugin/plugin.json
│   │   └── skills/svg-diagrams/   # SKILL.md + references/ + scripts/
│   ├── korean-docs/
│   │   ├── .claude-plugin/plugin.json
│   │   ├── commands/glossary-audit.md
│   │   ├── hooks/                 # hooks.json + check-md-glossary.mjs
│   │   └── skills/korean-docs/    # SKILL.md + references/ + scripts/ + templates/
│   └── ignite3/
│       ├── .claude-plugin/plugin.json
│       └── skills/ignite3/        # SKILL.md + references/
├── examples/
│   └── CLAUDE.md                  # Global instruction file example
├── LICENSE
└── README.md

Each plugin is self-contained under plugins/<name>/: components in the default locations (skills/, commands/, hooks/) are discovered automatically, and installs copy only that plugin's subtree.

Global Instructions Example

examples/CLAUDE.md is a ready-to-use global instruction file that pairs with these skills. Copy it to ~/.claude/CLAUDE.md to apply to every project, or merge individual sections into a project-level CLAUDE.md.

Every section is written to be environment-agnostic — proactive skill usage, code comment language, import discipline, no-stub/no-test-bypass rules, error handling, git conventions, and emoji-free output. The final "Korean Output Environment" section is optional: keep it together with the korean-docs plugin for a Korean-first setup, or delete it otherwise.

Local Development

To work on a skill and have Claude Code pick up changes immediately, clone this repository and symlink the skill directories into your personal skills folder instead of installing the plugins:

git clone https://github.com/simplecore-inc/simplecore-skills.git
cd simplecore-skills
ln -s "$(pwd)/plugins/svg-diagrams/skills/svg-diagrams" ~/.claude/skills/svg-diagrams
ln -s "$(pwd)/plugins/korean-docs/skills/korean-docs"   ~/.claude/skills/korean-docs
ln -s "$(pwd)/plugins/ignite3/skills/ignite3"           ~/.claude/skills/ignite3

Personal skills in ~/.claude/skills/ load on every session, so edits in the working tree apply without reinstalling. Do not install the marketplace plugins on the same machine — the skills would be registered twice.

Notes for symlink users:

• Symlinks carry only the skills. The /glossary-audit command and the Markdown audit hook register through plugin installation. To get the hook without installing the plugin, add it to ~/.claude/settings.json with an absolute path:

  {
    "hooks": {
      "PostToolUse": [
        {
          "matcher": "Write|Edit|MultiEdit",
          "hooks": [
            {
              "type": "command",
              "command": "node \"/path/to/simplecore-skills/plugins/korean-docs/hooks/check-md-glossary.mjs\"",
              "timeout": 30
            }
          ]
        }
      ]
    }
  }

• On Windows, creating symlinks requires Developer Mode (or an elevated shell with mklink /D). WSL and Linux need no special setup. On Windows, prefer the plugin installation over symlinks unless you are actively editing the skills.

Releasing Changes

1. Edit the plugin content under plugins/<name>/.
2. Bump the version in plugins/<name>/.claude-plugin/plugin.json (semantic versioning).
3. Validate the manifest: claude plugin validate .
4. Commit and push. Users receive the new version through claude plugin marketplace update followed by claude plugin update <plugin>.

Attribution

The ignite3 skill's reference documentation is derived from the Apache Ignite 3 documentation, licensed under the Apache License 2.0.

License

Apache License 2.0