Uninstall leaves behind MCP server, SessionStart hook, and cached scripts — browser auth tab keeps reappearing

[StuDub]

After installing and then removing this plugin, the following persistent artifacts remained on my system and continued to execute on every Claude Code session:

1. MCP server registered in ~/.claude.json (mcp-supermemory-ai → https://mcp.supermemory.ai/mcp) — not removed on uninstall
2. SessionStart hook at ~/.claude/plugins/cache/supermemory-plugins/.../hooks/hooks.json firing context-hook.cjs on every new session
3. Marketplace entry in ~/.claude/settings.json and ~/.claude/plugins/known_marketplaces.json
4. Cached plugin scripts at ~/.claude/plugins/cache/supermemory-plugins/

Symptom: every new Claude Code session opened an unsolicited browser tab to https://app.supermemory.ai/login/new attempting to (re-)authenticate, despite the plugin being uninstalled from my perspective.

Expected behaviour: uninstalling the plugin should remove all four artifacts above, or at minimum the MCP server entry and SessionStart hook — these are the components that execute code and make network calls.

Requests:

• Document the full uninstall procedure (or provide a single command) that reverses all install side-effects
• Consider making SessionStart hook + MCP server registration opt-in rather than default-on
• Ensure the auth browser-tab has a clear opt-out / "disable this plugin" link on the landing page

Environment: Linux, Claude Code CLI.