import type { CommandIO, CommandResult } from '../services/io.js';
/**
 * `cadence mcp install` (phase 78) — paste-free wiring of the MCP server into a
 * host. Pure merge/snippet helpers + a thin file-I/O service. Deliberately
 * SDK-free: registering this command must not load `@modelcontextprotocol/sdk`
 * (only `mcp serve` does).
 */
export type McpClient = 'claude-code' | 'claude-desktop' | 'cursor';
export declare const MCP_CLIENTS: readonly McpClient[];
export declare const CADENCE_MCP_ENTRY: {
    readonly command: "cadence";
    readonly args: readonly ["mcp", "serve"];
};
/**
 * Merge the cadence server entry into existing `.mcp.json` text (or create
 * fresh when null). Non-destructive: preserves unknown top-level keys and any
 * existing `mcpServers`; only the `cadence` key is set. Idempotent. Throws on
 * malformed / non-object JSON (the caller must not overwrite in that case).
 */
export declare function mergeMcpConfig(existing: string | null): string;
/** The paste-ready snippet (same `mcpServers` shape across hosts). */
export declare function mcpSnippet(): string;
/** Where to paste the snippet for a given host. */
export declare function clientHint(client: McpClient): string;
export interface InstallOptions {
    print?: boolean;
    client?: McpClient;
}
/**
 * Install/merge the cadence MCP server config. Only Claude Code's `.mcp.json` is
 * written; `--print` or any other client emits the snippet + a path hint and
 * writes nothing.
 */
export declare function installMcpConfig(repoRoot: string, opts: InstallOptions, io: CommandIO): Promise<CommandResult>;
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