Experimental
UNSTABLE
This capability is not part of the spec yet, and may be removed or changed at any point.
Capability to cancel work in a subagent session without ending that session.
Supplying {} advertises support; an omitted or null cancel does not.
{}
null
cancel
Optional
The _meta property is reserved by ACP to allow clients and agents to attach additional metadata to their interactions. Implementations MUST NOT make assumptions about values at these keys.
See protocol docs: Extensibility
UNSTABLE
This capability is not part of the spec yet, and may be removed or changed at any point.
Capability to cancel work in a subagent session without ending that session.
Supplying
{}advertises support; an omitted ornullcanceldoes not.