/**
 * A lightweight knowledge graph derived from the indexed sessions — no LLM
 * extraction, just the entities that already live in the data (projects,
 * tools, models, providers, git repos) and their links to sessions.
 */
export type EntityType = "project" | "tool" | "model" | "provider" | "repo";
export interface Entity {
    type: EntityType;
    name: string;
    session_count: number;
}
/** List entities of a given type (or all types) with how many sessions reference each. */
export declare function listEntities(type?: EntityType): Entity[];
export interface RelatedSession {
    session_id: string;
    source: string;
    title: string | null;
    project_name: string | null;
    started_at: string | null;
}
/** Find sessions linked to a specific entity (e.g. all sessions that used tool "Bash"). */
export declare function relatedSessions(type: EntityType, name: string, limit?: number): RelatedSession[];
export interface SessionGraph {
    session_id: string;
    project: string | null;
    model: string | null;
    provider: string | null;
    repo: string | null;
    tools: string[];
}
/** The entities a single session touches — its neighborhood in the graph. */
export declare function sessionGraph(sessionId: string): SessionGraph | null;
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