/**
 * PlatformCapabilities — declares what the host platform supports.
 *
 * Used for graceful degradation: features check capabilities before
 * attempting operations the platform may not support.
 */
export interface PlatformCapabilities {
    /** Platform supports background/async task dispatch. */
    hasBackgroundTasks: boolean;
    /** Platform supports session forking/branching. */
    hasSessionFork: boolean;
    /** Platform supports session creation (spawning new sessions). */
    hasSessionCreate: boolean;
    /** Platform supports session abort. */
    hasSessionAbort: boolean;
    /** Platform supports persistent agent file registration. */
    hasAgentFileSync: boolean;
    /** Platform supports multi-step tool execution (tool chaining). */
    hasMultiStepTools: boolean;
    /** Platform supports event streaming. */
    hasEventStream: boolean;
    /** Platform supports session status polling. */
    hasSessionStatus: boolean;
    /** Platform supports in-session active-role switching (Pi role switcher). */
    hasRoleSwitch: boolean;
    /** Platform identifier for logging and diagnostics. */
    platformId: string;
}
/**
 * Default capabilities for the opencode platform.
 * All features are supported.
 */
export declare function defaultCapabilities(): PlatformCapabilities;
/**
 * Minimal capabilities for platforms with limited support.
 * Use as a starting point for new platform adapters.
 */
export declare function minimalCapabilities(platformId: string): PlatformCapabilities;
/**
 * Capabilities for the Pi coding agent platform (pi.dev).
 * Supports event streaming and multi-step tools, but not background
 * dispatch, session management, or agent file sync.
 */
export declare function piCapabilities(): PlatformCapabilities;
/**
 * Capabilities for the Codex platform.
 *
 * Codex drives rolebox over MCP only — a plugin bundle registering rolebox's
 * MCP server — so every host-integration capability is absent except
 * multi-step tool execution, which the MCP tool surface provides. That is
 * exactly {@link minimalCapabilities}'s shape, so this delegates instead of
 * duplicating a block that could drift.
 */
export declare function codexCapabilities(): PlatformCapabilities;
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