import type { Prompt } from '@effect/ai';
/**
 * Conversation context metadata
 */
export interface ConversationPolicy {
    maxMessages?: number;
    maxChars?: number;
    strict?: boolean;
    isolated?: boolean;
}
export interface ConversationMetadata {
    createdAt: Date;
    updatedAt: Date;
    policy?: ConversationPolicy;
    [key: string]: any;
}
/**
 * Conversation context
 */
export interface ConversationContext {
    id: string;
    messages: Prompt.MessageEncoded[];
    metadata: ConversationMetadata;
}
/**
 * Session agent metadata derived from ConversationMetadata.
 */
export interface SessionAgentMetadata {
    id?: string;
    name?: string;
}
/**
 * Summary information for listing sessions.
 */
export interface SessionSummary {
    id: string;
    title?: string;
    preview?: string;
    createdAt: Date;
    updatedAt: Date;
    messageCount: number;
    agent?: SessionAgentMetadata;
}
/**
 * Detailed session view with messages and metadata.
 */
export interface SessionDetails {
    summary: SessionSummary;
    messages: Prompt.MessageEncoded[];
    metadata: ConversationMetadata;
}
/**
 * JSON export shape for sessions.
 */
export interface SessionExportJson {
    id: string;
    metadata: Record<string, unknown>;
    messages: Array<Record<string, unknown>>;
}
/**
 * Markdown export is a formatted string.
 */
export type SessionExportMarkdown = string;
/**
 * Context storage abstraction interface
 */
export interface ContextStorage {
    get(id: string): Promise<ConversationContext | null>;
    set(id: string, context: ConversationContext): Promise<void>;
    listSessions(): Promise<SessionSummary[]>;
    delete(id: string): Promise<void>;
    clear(): Promise<void>;
}
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