[BUG] Claude Desktop app - Filesystem connector not available in Cowork sessions

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?

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_