import type { Capability, ToolDeclaration, CapabilityPromptSection, CapabilityAction } from './index.js';
/**
 * Simplified retrieval interface for the capability layer.
 * Decoupled from AutoRetrieveProvider's RunContext requirement — the
 * capability system is backend-agnostic and has no RunContext at tool time.
 */
export interface RetrieveProvider {
    run: (opts: {
        input: string;
    }) => Promise<{
        text: string;
    } | null>;
    label?: string;
}
export interface AutoRetrieveCapabilityConfig {
    provider: RetrieveProvider;
}
/**
 * Converts auto-retrieve from a pipeline stage to an on-demand
 * `search_knowledge_base` tool. The LLM decides when to call it;
 * the result flows back as a tool result for the LLM to use.
 */
export declare class AutoRetrieveCapability implements Capability {
    private provider;
    constructor(config: AutoRetrieveCapabilityConfig);
    getTools(): ToolDeclaration[];
    getPromptSections(): CapabilityPromptSection[];
    processToolResult(_toolName: string, _args: unknown, _result: unknown): CapabilityAction | null;
}