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
Optional ExperimentaladditionalUNSTABLE
This capability is not part of the spec yet, and may be removed or changed at any point.
Additional workspace roots for this session. Each path must be absolute.
These expand the session's filesystem scope without changing cwd, which
remains the base for relative paths. When omitted or empty, no
additional roots are activated for the new session.
The working directory for this session. Must be an absolute path.
List of MCP (Model Context Protocol) servers the agent should connect to.
Request parameters for creating a new session.
See protocol docs: Creating a Session