/**
 * Session Context Tracker
 *
 * Tracks agent and model context for each session, allowing:
 * - System transform hook to inject agent-specific prompts
 * - Todo enforcer and background tasks to preserve model context
 *
 * Flow:
 * 1. chat.message hook fires with { sessionID, agent, model }
 * 2. We store the mapping: sessionID -> { agent, model }
 * 3. experimental.chat.system.transform fires with { sessionID }
 * 4. We look up the context and inject the appropriate prompt
 * 5. Todo enforcer / background tasks use model context when sending prompts
 */
export interface SessionModel {
    providerID: string;
    modelID: string;
}
export interface SessionContext {
    agent?: string;
    model?: SessionModel;
}
/**
 * Record context (agent + model) for a session.
 * Called from chat.message hook.
 */
export declare function setSessionContext(sessionID: string, context: {
    agent?: string;
    model?: SessionModel;
}): void;
/**
 * Get the full context for a session.
 */
export declare function getSessionContext(sessionID: string): SessionContext | undefined;
/**
 * Record which agent is active for a session (legacy helper).
 * Called from chat.message hook.
 */
export declare function setSessionAgent(sessionID: string, agent: string | undefined): void;
/**
 * Get the active agent for a session.
 * Called from experimental.chat.system.transform hook.
 */
export declare function getSessionAgent(sessionID: string): string | undefined;
/**
 * Get the active model for a session.
 */
export declare function getSessionModel(sessionID: string): SessionModel | undefined;
/**
 * Clear tracking for a session (on deletion).
 */
export declare function clearSessionAgent(sessionID: string | undefined): void;
/**
 * Check if an agent should receive orchestration injection.
 * Only build and plan agents get the orchestration prompt.
 */
export declare function shouldInjectOrchestration(agent: string | undefined): boolean;
/**
 * Get the agent type for prompt selection.
 * Returns "build", "plan", or string for other agents.
 */
export declare function getOrchestrationAgentType(agent: string | undefined): "build" | "plan" | string | undefined;