[BUG] Stale tasks cannot be cleared

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?

OS: Ubuntu 24.04.4 LTS
Shell: SSH --> Ubuntu ZSH

Description

My Claude Code session persistently shows "18 tasks (10 done)". All the tasks are stale and have been completed although I do not know when. However if I run /tasks, it shows no tasks.

When I query Claude, it states:

• It finds no running tasks it owns in ps
• There is no task-manifest file to clean
• TaskStop finds no live tasks

It suggests starting a new session to clear, which I do not want to do due to context, history, and memory.

It is unclear how or exactly when the session got to this state, but I did have a power outage affecting the system causing a hard disconnect around the same time.

The majority of issue reports on stale tasks seem related to /compact but I doubt this caused my situation as I have never had an issue with /compact before.

What Should Happen?

Claude should be able to auto / manually garbage clean stale tasks, even on hard disconnects.

Error Messages/Logs

None.

Steps to Reproduce

See description above, not consistently reproducible.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.218

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

_No response_