[BUG] Claude Code hallucinates slash-commands, incl. "verbose", "no-think", etc.

Bug Description
Claude is hallucinating the following slash-commands: "compact" (not the real functionality), "verbose", "think", and "no-think", see transcript for details

Environment Info

• Platform: macos
• Terminal: vscode
• Version: 0.2.74
• Feedback ID: b2402487-62f5-428b-8721-16f5a89a610e

Errors

[]

Interesting snippets from a session I had with Claude trying to get it to introspect about slash-commands:

⏺ The "/compact" command appears to be a built-in Claude Code command rather than a custom project command. According to the README, it's mentioned as an example of a slash command that can trigger
  specific actions.

  When invoked, the "/compact" command makes Claude's responses more concise and to the point. It reduces verbosity in responses, focusing only on essential information.

  Compact mode enabled. I'll be more concise.

  Built-in Claude Code commands:
  - /compact - Switches to compact mode with brief, concise responses
  - /verbose - Switches to verbose mode with detailed, comprehensive responses
  - /help - Provides help information about using Claude Code
  - /think - Shows Claude's reasoning process (thinking steps)
  - /no-think - Hides the thinking process
 ```

/verbose

⏺ Verbose mode enabled. I'll now provide more detailed and comprehensive responses.

In verbose mode, I'll offer:

• More thorough explanations
• Additional context and background information
• More detailed steps in processes
• Complete reasoning for my answers
• Extended examples where helpful

This is in contrast to compact mode (/compact) which aims for maximum brevity and the default mode which strikes a balance between detail and conciseness.

Is there something specific you'd like me to explore in greater detail?

Interactive sessions support built-in slash commands that trigger specific behaviors:

• /compact - Switches to compact mode with brief responses
• /verbose - Activates verbose mode with detailed explanations
• /help - Displays help information about Claude Code
• /think - Shows Claude's reasoning process (helpful for debugging)
• /no-think - Hides the thinking process
• Custom project commands in .claude/commands/ directory

```