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claude-code - 💡(How to fix) Fix [BUG] Claude Desktop app - Filesystem connector not available in Cowork sessions [2 comments, 3 participants]

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anthropics/claude-code#49181•Fetched 2026-04-17 08:48:35
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Error Message

Error Messages/Logs

Code Example

The Filesystem connector tools (list_directory, move_file, etc.) are still not available — same result as before. The bug is confirmed and reproducible: even with the skill loaded and the connector attached via the "+" button, the Filesystem tools simply don't surface in Cowork sessions.
This is definitely something to include in your bug report.

One additional detail worth adding:
The connector also fails to load when triggered from within a skill that explicitly requires it (uses Filesystem:list_directory and Filesystem:move_file). The tools are absent whether the connector is pre-attached or attached mid-session.
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Preflight Checklist

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

What's Wrong?

The Filesystem connector is installed and configured in the Claude desktop app. It works correctly in the standard Claude desktop app chat, but its cannot be loaded in Cowork sessions. Claude cannot load the connector in Cowork; the connector appears enabled in the UI but is not surfaced in Cowork sessions

Environment: macOS 26.4.1 (25E253), Claude desktop app (Cowork mode) 1.2773.0 (884b37)

What Should Happen?

Claude can load the connector in Cowork, as it already does in the standard desktop chat

Error Messages/Logs

The Filesystem connector tools (list_directory, move_file, etc.) are still not available — same result as before. The bug is confirmed and reproducible: even with the skill loaded and the connector attached via the "+" button, the Filesystem tools simply don't surface in Cowork sessions.
This is definitely something to include in your bug report.

One additional detail worth adding:
The connector also fails to load when triggered from within a skill that explicitly requires it (uses Filesystem:list_directory and Filesystem:move_file). The tools are absent whether the connector is pre-attached or attached mid-session.

Steps to Reproduce

Install the Filesystem connector via Customize → Connectors → "+" button Configure an allowed directory and click Save Start a new Cowork session The filesystem tools (read file, move file, etc.) are not available to Claude

Also tried: Starting a new cowork session. Restarting the Claude desktop application. Restarting the computer. Starting multiple fresh sessions

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

No response

Claude Code Version

Claude 1.2773.0 (884b37) 2026-04-15T14:32:09.000Z

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

No response

extent analysis

TL;DR

The Filesystem connector fails to load in Cowork sessions, despite being installed and configured correctly in the Claude desktop app.

Guidance

  • Verify that the connector is properly configured and enabled in the Claude desktop app, outside of Cowork sessions.
  • Check if the issue persists when triggering the connector from within a skill that explicitly requires it, to confirm if it's a general loading issue or specific to Cowork sessions.
  • Attempt to load the connector in a standard desktop chat session to confirm if the issue is specific to Cowork mode.
  • Review the connector's documentation to ensure that it is compatible with Cowork sessions and the Sonnet model.

Example

No code snippet is provided as the issue seems to be related to the configuration and compatibility of the Filesystem connector with Cowork sessions.

Notes

The issue may be related to the specific version of the Claude desktop app (1.2773.0) or the Sonnet model, and further investigation is needed to determine the root cause.

Recommendation

Apply workaround: Try loading the connector in a standard desktop chat session or with a different model to isolate the issue, as the problem seems to be specific to Cowork sessions with the Sonnet model.

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claude-code - 💡(How to fix) Fix [BUG] Claude Desktop app - Filesystem connector not available in Cowork sessions [2 comments, 3 participants]