Newly-installed plugin skills missing from slash-command autocomplete until Desktop restart

Summary

After installing a plugin via the marketplace in Claude Code Desktop, the plugin's skills do not appear in slash-command autocomplete (typing /<name> in the input box) until Desktop is fully restarted. The skills work — they're invocable via the + button menu — they're just absent from autocomplete.

Reproduction

1. Install a plugin with skills via Desktop's marketplace UI.
2. Without restarting, type / in the input box and look for the plugin's skills in the autocomplete dropdown.

Expected

New skills appear in autocomplete immediately after install completes.

Actual

Skills missing from autocomplete. Workarounds: select via + button menu, or restart Desktop.

Environment

Claude Code Desktop v2.1.121, macOS.