Desktop: list_sessions with linked: true does not return sessions started from a spawn_task chip, though get_session reports them as children

Where: Claude desktop app on macOS, Code tab. The sessions run on a Linux host over SSH, and get_session reports "isRemote": true for all of them.

What happened

One remote Code-tab session created several background-task chips with mcp__ccd_session__spawn_task, and the user clicked each one to start it. Each new session also ran on the Linux host. From the first session:

• mcp__ccd_session_mgmt__get_session on any of the started sessions returns "parentSessionId": "<first session's id>" and "detached": false.
• mcp__ccd_session_mgmt__list_sessions with {"linked": true} returns "No other sessions found." At that point eight such sessions existed, all still unarchived.

Expected

The tool describes linked: true as listing "this session's linked family: the session that started it, the sessions it or they started". Sessions whose parentSessionId is this session should appear there.

Why it matters

A session that coordinates chip-started sessions has no other way to find one whose id it doesn't already know. In our case, the only way to find one of them was to call list_sessions without the filter and pick it out by title, among about 30 sessions from two machines.

A related point in the same description

It says linked sessions are ones "Claude started from another with start_session", but no start_session tool is available in the session. Either the description is stale, or the tool is missing from this setup.

Reproduction

1. In a remote Code-tab session, call spawn_task with any prompt, then click the chip to start it.
2. In the first session, call get_session on the new session's id and note parentSessionId.
3. In the first session, call list_sessions with {"linked": true}.

Seen once, in this remote setup. I haven't checked whether a local session on macOS behaves the same way.

Related

• #95195 (show sessions as a parent/child tree in the sidebar)
• #82788 (put spawned sessions in their parent's sidebar group)