Appvision Claude Code plugins

A Claude Code plugin marketplace. Add it once, then install the plugins you want.

Plugin	What it does
eraser-diagrams	Draws architecture diagrams, flowcharts, swimlanes and ERDs, and renders them to PNG on your machine with Eraser's open-source engine.

Install

In Claude Code:

/plugin marketplace add appvision-ai/claude-plugins
/plugin install eraser-diagrams@appvision

Or from a shell:

claude plugin marketplace add appvision-ai/claude-plugins
claude plugin install eraser-diagrams@appvision

Claude Code clones the repository with git. If the add fails on a machine without a GitHub SSH key, set CLAUDE_CODE_PLUGIN_PREFER_HTTPS=1 and try again.

Each plugin's README lists what else it needs.

Updates

Marketplaces you add yourself do not update on their own. Either:

• run /plugin marketplace update appvision when a new version is announced, or
• turn on auto-update once: /plugin → Marketplaces → appvision → Enable auto-update.

Turn a plugin on for everyone in a repository

Commit this to the repository's .claude/settings.json:

{
  "extraKnownMarketplaces": {
    "appvision": {
      "source": { "source": "github", "repo": "appvision-ai/claude-plugins" }
    }
  },
  "enabledPlugins": {
    "eraser-diagrams@appvision": true
  }
}

Anyone who opens the repository in Claude Code and accepts the folder-trust prompt gets the plugin, with no separate install step.

Adding a plugin

1. Create plugins/<name>/.claude-plugin/plugin.json and the plugin's skills/, commands/ or agents/ beside it.
2. Add an entry to .claude-plugin/marketplace.json with "source": "./plugins/<name>".
3. Run claude plugin validate . and claude plugin validate ./plugins/<name>.
4. Try it without installing: claude --plugin-dir ./plugins/<name>.

To ship a change to an existing plugin, bump version in its plugin.json. Users who already have the plugin keep their cached copy until the version string changes.

Licence

MIT.