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claude-code - 💡(How to fix) Fix [BUG] CLI tip suggests /install-slack-app which is an unknown command [1 participants]

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anthropics/claude-code#56010•Fetched 2026-05-05 06:00:33
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Error Message

  1. Get "Unknown command" error

Code Example

Unknown command: /install-slack-app
RAW_BUFFERClick to expand / collapse

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

Reported via Claude Code (Assisted-by: Claude)

extent analysis

TL;DR

The issue can be resolved by removing or updating the non-existent /install-slack-app command suggestion from the Claude Code CLI tips.

Guidance

  • Verify the list of available commands in the Claude Code CLI to ensure /install-slack-app is not a typo or an outdated command.
  • Check the documentation or source code of Claude Code CLI (version 2.1.126) to see if there's a way to customize or update the tips shown in the interface.
  • If the command is supposed to be available, investigate why it's not recognized by the CLI, possibly due to a missing installation or configuration step.
  • Consider reporting the issue to the Claude Code developers to have the tip updated or removed.

Example

No code snippet is provided as the issue is related to a specific command and its availability in the CLI.

Notes

The solution may require changes to the Claude Code CLI's internal configuration or codebase, which might not be directly accessible to users. The issue might be specific to version 2.1.126 or the Linux (Fedora 42) environment.

Recommendation

Apply workaround: Remove or ignore the /install-slack-app tip until the command is properly implemented or the tip is updated by the developers, as it currently causes confusion and does not provide a functional feature.

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