/**
 * In-process session store for compiled IR and RuntimeEngine instances.
 *
 * The MCP server is a long-lived stdio process managed by the host (e.g. Claude
 * Desktop). This store caches compiled IR keyed by content hash so that the
 * execute and explain tools can reference a prior compile result.
 *
 * No cross-process persistence — when the server process restarts, all cached
 * IR is lost. Re-compilation is cheap (sub-millisecond for typical manifests).
 */
import type { IR } from '@angriff36/manifest/ir';
import { RuntimeEngine, type RuntimeContext, type RuntimeOptions } from '@angriff36/manifest';
export interface CacheEntry {
    ir: IR;
    contentHash: string;
    engine: RuntimeEngine;
    createdAt: number;
}
declare class SessionStore {
    private cache;
    private maxSize;
    /**
     * Store compiled IR and create a pre-warmed RuntimeEngine for it.
     * Uses FIFO eviction when the cache exceeds maxSize.
     */
    store(contentHash: string, ir: IR, context?: RuntimeContext, options?: RuntimeOptions): void;
    get(contentHash: string): CacheEntry | undefined;
    getEngine(contentHash: string): RuntimeEngine | undefined;
    getIR(contentHash: string): IR | undefined;
    list(): Array<{
        contentHash: string;
        createdAt: number;
    }>;
    clear(): void;
}
/** Singleton session store for the MCP server process lifetime. */
export declare const sessionStore: SessionStore;
export {};
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