import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import type { RuntimeOptionsExtension } from "./runtime-option-extensions.js";
/** Pi bounds MCP text content at 12,000 characters; leave framing headroom. */
export declare const REQUEST_SCOPED_MCP_MODEL_TEXT_MAX_CHARS = 10000;
export declare const REQUEST_SCOPED_MCP_MAX_CURSOR_BYTES = 2048;
export declare const REQUEST_SCOPED_MCP_NESTED_RESULT_OMISSION = "[nested history-tool result omitted; inspect the referenced record directly]";
export interface RequestScopedMcpEndpointOptions {
    readonly serverName: string;
    readonly startingMessage: string;
    /** A fresh server is required for every stateless HTTP request. */
    readonly createServer: (input: Parameters<RuntimeOptionsExtension>[0]) => McpServer;
    readonly onUnavailable?: (error: unknown) => void;
}
/**
 * Create one capability-path loopback endpoint per model request. Each HTTP
 * request gets a fresh MCP server and stateless transport so model failover may
 * initialize again without inheriting transport state.
 */
export declare function createRequestScopedMcpRuntimeExtension(options: RequestScopedMcpEndpointOptions): RuntimeOptionsExtension;
export declare function requestScopedCurrentRunBlocked(candidateRunId: string, currentRunId: string): boolean;
export declare function requestScopedConversationMatches(candidateConversationId: string, requestConversationId: string, rollover: "none" | "daily" | undefined): boolean;
export declare function requestScopedNestedResult(toolName: string, aliases: readonly string[], value: unknown, omission?: string): unknown;
export declare function splitRequestScopedModelText(section: string): Array<{
    readonly type: "text";
    readonly text: string;
}>;
/** Unsigned cursor, matching RunHistory: structure + binding digest provide validation. */
export declare function encodeRequestScopedCursor(value: Readonly<Record<string, unknown>>): string;
export declare function decodeRequestScopedCursor(cursor: string): Record<string, unknown> | undefined;
export declare function requestScopedCursorDigest(parts: readonly (string | number | boolean | undefined)[]): string;
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