[BUG] Skills from marketplace plugins don't appear in terminal autocomplete but work in VS Code

Description

Skills installed via marketplace plugins (e.g., example-skills@anthropic-agent-skills) don't appear in terminal autocomplete suggestions, but they DO work when you type the full command and press enter.

VS Code behavior: Typing /front shows /frontend-design in the autocomplete dropdown ✅

Terminal behavior: Typing /front shows nothing in autocomplete, but typing /frontend-design and pressing enter successfully loads the skill ✅

Steps to reproduce

1. Install a marketplace plugin with bundled skills:

``bash
claude plugin marketplace add anthropics/skills
claude plugin install example-skills
``

1. Start Claude Code in terminal

1. Type /front and observe no autocomplete suggestions appear

1. Type /frontend-design and press enter - the skill loads correctly

1. Compare with VS Code extension where autocomplete works

Environment

• Installation method: Native (curl installer)
• OS: macOS (darwin)
• Claude Code version: Latest

Expected behavior

Skills should appear in terminal autocomplete the same way they do in VS Code.

Additional context

The skills are definitely loaded (they appear in the system prompt and work when invoked). This appears to be a terminal-specific autocomplete indexing issue, possibly related to how nested/bundled skills from marketplace plugins are indexed differently than standalone skills in ~/.claude/skills/.