import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
import { createErrorToolResponse } from './tool-response.js';
export declare function resetMaxFileCharsCacheForTesting(): void;
export declare function validateFileBudget(content: string): ReturnType<typeof createErrorToolResponse> | undefined;
export declare const SOURCE_RESOURCE_URI = "internal://file/current";
export declare const fileStaleWarningMs: import("./config.js").CachedEnvInt;
export interface FileSlot {
    filePath: string;
    content: string;
    language: string;
    lineCount: number;
    sizeChars: number;
    /** Date.now() epoch ms — used for TTL checks and stale warnings. */
    cachedAt: number;
    /** ISO 8601 timestamp for display in resources and tool responses. */
    cachedAtIso: string;
}
/** Binds file resource notifications to the currently active server instance. */
export declare function initFileStore(server: McpServer): void;
export declare function disposeFileStore(): void;
export declare function storeFile(slot: FileSlot): void;
export declare function getFile(): FileSlot | undefined;
/** Test-only: directly set or clear the file slot without emitting resource-updated. */
export declare function setFileForTesting(slot: FileSlot | undefined): void;
export declare function createNoFileError(): ReturnType<typeof createErrorToolResponse>;