What
Claude Code can run helper agents, sometimes called subagents: separate workers it starts to handle part of a task. Some of these are started by other agents, so an agent can have a parent.
The filter that picks out running agents now takes a parent agent as input and returns the agents started by that parent. Before, it could only return top-level agents, the ones with no parent at all.
Why
This affects how nested agents, meaning agents started by other agents, are grouped and shown on screen.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
It is not clear what a user will see differently on screen as a result.