Optional ExperimentalcompactionUNSTABLE
This capability is not part of the spec yet, and may be removed or changed at any point.
Support for ID-addressed context compaction updates. Omitted or null
means unsupported; {} advertises the complete compaction contract.
OptionalconfigConfig option capabilities supported by the client.
Omitted or null both mean the client does not advertise support for any
config option extensions.
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
Session-related capabilities supported by the client.