2.1.89 regression: local slash command autocomplete broken in projects

Description

After upgrading from 2.1.87 to 2.1.89, the / command autocomplete for local project commands (.claude/commands/*.md) stopped working entirely across all projects. Downgrading back to 2.1.87 restores the behavior.

Steps to Reproduce

1. Have one or more projects with .claude/commands/ containing .md command files
2. Upgrade to 2.1.89
3. Open any of those projects and type / in the prompt

Expected Behavior

Autocomplete suggestions appear for the custom commands defined in .claude/commands/

Actual Behavior

No suggestions appear when typing / — local commands are not shown

Environment

• OS: Linux (Ubuntu)
• Claude Code version affected: 2.1.89
• Claude Code version where it works: 2.1.87

Notes

Nothing in the 2.1.89 changelog mentions changes to slash command autocomplete, so this appears to be an unintentional regression.