Agent Client Protocol - v1.2.1
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    Type Alias ResumeSessionRequest

    Request parameters for resuming an existing session.

    Resumes an existing session without returning previous messages (unlike session/load). This is useful for agents that can resume sessions but don't implement full session loading.

    Only available if the Agent supports the sessionCapabilities.resume capability.

    type ResumeSessionRequest = {
        sessionId: SessionId;
        cwd: string;
        additionalDirectories?: string[];
        mcpServers?: McpServer[];
        _meta?: { [key: string]: unknown } | null;
    }
    Index
    sessionId cwd additionalDirectories? mcpServers? _meta?
    sessionId: SessionId

    The ID of the session to resume.

    cwd: string

    The working directory for this session. Must be an absolute path.

    additionalDirectories?: string[]

    Additional workspace roots to activate for this session. Each path must be absolute.

    When omitted or empty, no additional roots are activated. When non-empty, this is the complete resulting additional-root list for the resumed session. It may differ from any previously used or reported list as long as the request cwd matches the session's cwd.

    mcpServers?: McpServer[]

    List of MCP servers to connect to for this session.

    Optional_meta

    _meta?: { [key: string]: unknown } | null

    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

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