Slash command autocomplete doesn't show custom skills from ~/.claude/skills/

Description

The / autocomplete dropdown in the input bar does not list any custom skills from ~/.claude/skills/ or installed plugin skills. Only built-in commands (schedule, btw, rewind) appear.

Environment

• Claude Code v2.1.110
• macOS (Darwin 25.4.0)
• 70 skill directories in ~/.claude/skills/
• 13 plugins enabled via settings.json

Steps to Reproduce

1. Create skills in ~/.claude/skills/<name>/SKILL.md with valid frontmatter (name, description, user-invokable: true)
2. Restart Claude Code
3. Type / in the input bar
4. Only built-in commands appear — no custom skills or plugin skills are listed

Expected Behavior

Custom skills with user-invokable: true should appear in the / autocomplete dropdown, filterable by typing (e.g. /li should show lint).

Actual Behavior

Only 3 built-in commands show: schedule, btw, rewind. Typing further (e.g. /d) shows no matches from custom skills.

Workaround

Skills ARE loaded into the model context and work when:

• The model invokes them via the Skill tool (e.g. user says "run /lint")
• The model auto-triggers them based on skill description matching

The issue is specifically with the UI autocomplete — user cannot browse or directly invoke custom skills from the input bar.

Additional Context

• All 70 skill directories contain valid SKILL.md files with YAML frontmatter
• Previously had 22 broken symlinks (to /tmp/gstack-install) which were removed — did not fix the issue
• Plugin skills (e.g. from frontend-design, hookify, telegram) also don't appear
• ~/.claude/commands/ (legacy format) contains 2 .md files — these also don't appear