import type { ISubAgentContextBuilder, RagResult, SubAgentContextRequest, SubAgentContextResult } from '@mcp-abap-adt/llm-agent';
/**
 * Thin retrieval callback used by the builder. The caller is responsible
 * for converting `text` into whatever the underlying store needs
 * (typically: wrap text + embedder in QueryEmbedding, then call
 * `IRag.query(embedding, k, options)`), but the builder itself stays
 * decoupled from embedder/RAG specifics.
 */
export type SubAgentRetrievalSource = (text: string, k: number, signal?: AbortSignal) => Promise<RagResult[]>;
export interface DefaultSubAgentContextBuilderConfig {
    /** Source of project/domain knowledge snippets. */
    projectSource?: SubAgentRetrievalSource;
    /** Source of tool-description / MCP-RAG snippets. */
    toolSource?: SubAgentRetrievalSource;
    topKProject?: number;
    topKTool?: number;
    maxContextChars?: number;
}
/**
 * Builds subagent context by querying project source, then tool source.
 * Skips retrieval entirely when the agent's contextPolicy is 'forbidden'.
 * Bounds the final context by character budget (cheap proxy for tokens).
 */
export declare class DefaultSubAgentContextBuilder implements ISubAgentContextBuilder {
    private readonly config;
    constructor(config: DefaultSubAgentContextBuilderConfig);
    build(req: SubAgentContextRequest): Promise<SubAgentContextResult>;
    private refOf;
}
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