[BUG] PostHog plugin /insights shadows built-in /insights with no way to disambiguate

Description

The official PostHog plugin (posthog@claude-plugins-official) registers a /insights skill that completely shadows the built-in /insights (Claude Code session analytics).

Steps to reproduce

1. Enable the PostHog plugin in settings: "posthog@claude-plugins-official": true
2. Type /insights in the CLI
3. Both skills appear in the picker — one labeled (posthog) and one for Claude Code session analytics
4. Select the built-in (non-PostHog) entry
5. The PostHog version is invoked instead

Expected behavior

Selecting the built-in /insights from the picker should invoke the built-in skill. Ideally, plugin skills should be namespaced (e.g. posthog:insights) to avoid collisions with built-in skills entirely.

Actual behavior

The PostHog plugin version always takes priority regardless of which entry is selected in the UI.

Related issues

• #36114 (locked)
• #22063 (locked)

Environment

• macOS
• Claude Code CLI latest