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Claude Code Plugin

The official Mostly Good Metrics plugin for Claude Code. It connects Claude to your MGM projects via MCP and ships skills for analyzing metrics, building funnels, running weekly reviews, and instrumenting your app.

Install​

Inside Claude Code:

/plugin marketplace add Mostly-Good-Metrics/claude-plugin
/plugin install mostly-good-metrics@mostly-good-metrics

First run: the first time Claude calls an MGM tool, Claude Code opens your browser to sign in to Mostly Good Metrics (OAuth). No API keys or manual configuration needed — approve once and you're connected.

What you get​

The plugin connects the MGM MCP server (https://app.mostlygoodmetrics.com/mcp), giving Claude tools to query events, run and save queries, build funnels, measure retention, manage experiments, and read your dashboard. See MCP server for the full tool list.

Skills​

  • analyze-metrics — Claude uses this automatically when you ask how something is doing.
    • "How are signups trending this month?"
    • "Which platform drives the most sessions?"
  • funnel-doctor — Claude uses this automatically for conversion questions.
    • "Where do users drop off during onboarding?"
    • "Build a checkout funnel and tell me what to fix first."
  • weekly-review — run it yourself with /mostly-good-metrics:weekly-review for a compact week-over-week report: WAU, signups, top-event deltas, notable movers, and one suggested action.
  • instrument-my-app — Claude uses this automatically when you want to add analytics to code.
    • "Add MGM tracking to my Flutter app."
    • "What events should I track for this signup flow?"

The instrument-my-app skill knows all six SDKs: Swift, Android, Flutter, JavaScript, React Native, and Capacitor.