[BUG] Cowork Scheduled tasks fail with ECONNRESET error while Chat mode works normally

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?

Cowork Scheduled tasks consistently fail with API Error: Unable to connect to API (ECONNRESET) while regular Chat mode on the same Claude Desktop app works perfectly fine.

What Should Happen?

Scheduled tasks should run at the configured cadence without connection errors

Error Messages/Logs

Scheduled tasks show "service busy" → eventually fail with ECONNRESET
Chat mode (same app, same account, same network) works normally
Error suggests the task's background connection is being reset mid-execution

Steps to Reproduce

1. Open Claude Desktop and navigate to the Cowork tab
2. Click "Scheduled" in the left sidebar
3. Click "+ New task" to create a new scheduled task
4. Enter a simple prompt (e.g., "Tell me the current date")
5. Set the frequency to "Daily" (or any recurring option)
6. Click "Save" to create the task
7. Wait for the scheduled time to arrive, or click "Run"

to manually trigger the task

1. Check the execution log by clicking into the task history
2. Observe the error: "API Error: Unable to connect to API (ECONNRESET)"

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude 1.12603.1 (3df4fd) 2026-06-11T16:57:36.000Z

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

Regression since 2 days ago. Chat mode works fine,
only Cowork Scheduled tasks fail with ECONNRESET.
Suggests issue specific to Cowork's background task
connection management.