[BUG] CLI tip suggests /install-slack-app which is an unknown command

Bug Description

Claude Code CLI displays a tip suggesting users run /install-slack-app, but this command does not exist. Running it returns:

Unknown command: /install-slack-app

Steps to Reproduce

1. Use Claude Code CLI (version 2.1.126, Linux)
2. Observe the rotating tips shown in the interface
3. Eventually the tip use /install-slack-app appears
4. Run /install-slack-app
5. Get "Unknown command" error

Expected Behavior

Tips should only suggest commands that actually exist and are functional.

Actual Behavior

The tip suggests a non-existent slash command, leading to user confusion.

Environment

• Claude Code version: 2.1.126
• Platform: Linux (Fedora 42)
• Shell: bash

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Reported via Claude Code (Assisted-by: Claude)