[Feature Request] Add plugin installation analytics for marketplace authors

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Problem

Plugin authors currently have no way to track if their plugins are being installed or used by the community. This makes it difficult to:

• Understand plugin adoption and reach
• Prioritize maintenance and updates
• Gauge community interest
• Measure impact of improvements

Current State

• ✅ Plugins can be published via custom marketplaces
• ✅ Users can discover and install plugins via /plugin install
• ❌ No analytics or metrics available to plugin authors
• ❌ No visibility into installation counts, active users, or usage patterns

Proposed Solution

Add basic analytics for plugin authors to track:

1. Installation metrics

• Total installations
• Installations over time
• Uninstall events

1. Usage metrics (optional)

• Active users (users who have the plugin enabled)
• Skill/command invocation counts
• Version distribution

1. Access methods

• Dashboard at console.anthropic.com for marketplace owners
• API endpoint for programmatic access
• Optional webhook notifications for events

Example Use Case

As a plugin author who maintains enhanced-statusline@deepan-statusline-plugins:

• I want to know if anyone is using my plugin
• I want to understand which versions are most popular
• I want to decide if I should continue maintaining it

Privacy Considerations

• Analytics should be aggregated (no PII)
• Users should be able to opt-out
• Only marketplace owners/verified authors can access data
• Comply with data retention policies

Alternative Workarounds Considered

Currently, plugin authors must:

• Monitor git clone counts (limited data)
• Add custom telemetry (requires disclosure, adds complexity)
• Rely on GitHub stars/issues (low signal)

These workarounds provide incomplete data and add friction.

Benefits

• For plugin authors: Better understanding of impact and adoption
• For the ecosystem: Encourages quality plugin development
• For users: More maintained, popular plugins rise to the top

Related

• Similar to NPM download counts, VS Code extension analytics, Chrome extension metrics
• Aligns with existing Claude Code analytics at console.anthropic.com