/**
 * MCP hosts truncate server instructions near 2 KB, so the prompt stays
 * within this limit with the most decisive rules first. Detail lives in
 * each tool's description.
 */
export declare const MAX_MCP_INSTRUCTION_CHARS = 2000;
/** Prompt size in UTF-8 bytes: the request-cost budget. */
export declare const MAX_MCP_INSTRUCTION_BYTES = 1600;
export declare const TOOL_RESEARCH_INSTRUCTIONS: string;
/**
 * MCP `initialize.instructions`. The prompt is the same for every tool
 * subset; `_enabledToolNames` stays only for existing callers.
 */
export declare function buildMcpInstructions(_enabledToolNames?: readonly string[]): string;
/** CLI `schema` instructions: the same prompt as MCP. */
export declare function buildCliInstructions(): string;
export interface GrammarCapability {
    language: string;
    languageId?: string;
    selectorAliases: readonly string[];
    extensions: readonly string[];
    structuralSearch: boolean;
    signatureOutline: boolean;
    graphFacts: boolean;
}
/** Runtime astSearch grammar inventory, served by CLI `schema` beside the prompt. */
export declare function buildGrammarCapabilityInstruction(capabilities: readonly GrammarCapability[] | undefined): string | undefined;