stopgate

cassandra-plugins

Claude Code plugin marketplace for the Cassandra platform.

Setup

Add the marketplace:

claude plugin marketplace add Cassandras-Edge/cassandra-marketplace

Install a plugin

claude plugin install <plugin-name>

Available plugins:

Plugin	Type	Description
stopgate	Hook	Blocks lazy stops — uses an LLM call to verify task completion
acl-lint	Hook	Validates acl.yaml structure on write/edit
gateway-mcp	MCP	Cassandra Gateway — execute any platform tool via sandboxed Python
market-research	MCP	Financial market data — stocks, SEC filings, macro, options, earnings
twitter-mcp	MCP	Twitter/X — news search, Grok AI, post analytics, personal timeline
reddit-mcp	MCP	Reddit — search, subreddit browsing, post + comment reading
claudeai-mcp	MCP	claude.ai — conversations, projects, knowledge docs, artifacts
discord-mcp	MCP	Discord — search messages, read channels/threads/DMs, attachments
media-mcp	MCP	YouTube/media — transcription, search, comments, Watch Later

Examples

# Install the stop gate hook
claude plugin install stopgate

# Install the gateway MCP server
claude plugin install gateway-mcp

# Install to current project only
claude plugin install media-mcp --scope project

Managing plugins

# List installed plugins
claude plugin list

# Disable a plugin without uninstalling
claude plugin disable stopgate

# Re-enable
claude plugin enable stopgate

# Uninstall
claude plugin uninstall stopgate

# Update all plugins after marketplace changes
claude plugin marketplace update
claude plugin update <plugin-name>

Auth

MCP plugins authenticate via WorkOS OAuth. On first tool call, you'll be prompted to authorize in the browser. No API keys or manual config needed.