[BUG] Cowork: Session init fails to mount scheduled task config folder outside project mount after macOS Desktop upgrade

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?

After upgrading Claude Desktop on macOS, initializing any Cowork project session fails with a VirtioFS mount error. The error appears to occur because Cowork attempts to mount the scheduled task config folder as part of session init, even though that folder is outside the project's mount point and unrelated to the current prompt.

Setup:

• Project mount point: /Users/myusername/proj/llm-wiki
• Scheduled task config (managed by Cowork, not user-configurable): /Users/myusername/Documents/Claude/Scheduled/llm-wiki-weekly-note/SKILL.md
• These paths are entirely separate; the scheduled task config is outside the project folder

What Should Happen?

Cowork session initializes successfully. The scheduled task config folder should not require a separate VirtioFS mount at session init, particularly when it is outside the active project mount and the current prompt is unrelated to the scheduled task.

Error Messages/Logs

RPC error: failed to mount /mnt/.virtiofs-root/shared/Users/myusername/Documents/Claude/Scheduled/llm-wiki-weekly-note as .scheduled/llm-wiki-weekly-note: source path is not accessible: /mnt/.virtiofs-root/shared/Users/myusername/Documents/Claude/Scheduled/llm-wiki-weekly-note: stat /mnt/.virtiofs-root/shared/Users/myusername/Documents/Claude/Scheduled/llm-wiki-weekly-note: operation not permitted

Steps to Reproduce

1. Have a Cowork project configured with a scheduled task
2. Upgrade Claude Desktop on macOS
3. Attempt to initialize a session in the Cowork project
4. Session init fails immediately with the above RPC error

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude 1.5354.0 (9a9e3d) 2026-04-29T01:14:34.000Z (Claude Desktop for Mac)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_