[BUG] Skill activation message appears repeatedly in chat on every session

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

When a skill is installed (e.g. motion-design) with Trigger set to "Slash command + auto", the following message appears automatically at the start of every new conversation:

"Hey Claude—I just added the 'motion-design' skill. Can you make something amazing with it?"

This message is not present in the skill's SKILL.md file and cannot be disabled from the Skills settings UI. There is no toggle to suppress this activation prompt.

Expected behavior: The activation message should either not appear, or there should be an option to disable it.

Steps to reproduce:

1. Install any skill with "auto" trigger
2. Start a new conversation
3. The activation message appears automatically

Platform: macOS, Claude Code desktop app

What Should Happen?

The skill activation message should not appear automatically in every new conversation, or there should be an option in the Skills settings UI to disable it.

Error Messages/Logs

Steps to Reproduce

1. Open Claude Code desktop app
2. Go to Settings > Skills
3. Install any skill with Trigger set to "Slash command + auto" (e.g. motion-design)
4. Start a new conversation
5. The activation message appears automatically without any user input

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.172 (Claude Code)

Platform

Other

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_