import type { LspTransport } from "../../core/lsp.js";
/** The slice of a spawned child process the transport uses (so a test can drive a fake duplex — no real spawn). */
export interface LspChildProcess {
    stdin: {
        write(data: Buffer): void;
        on(event: "error", cb: (err: unknown) => void): void;
    };
    stdout: {
        on(event: "data", cb: (chunk: Buffer) => void): void;
    };
    on(event: "exit" | "error", cb: (arg?: unknown) => void): void;
    kill(signal?: string): void;
    /** Present on a real child process; used on win32 (shell:true shim) to tree-kill on close. */
    pid?: number;
}
export declare class StdioLspTransport implements LspTransport {
    private readonly child;
    private readonly requestTimeoutMs;
    private nextId;
    private readonly pending;
    private isClosed;
    private readonly decode;
    /** design/121: server→client notification subscribers (publishDiagnostics, …). Empty = pre-121 behavior. */
    private readonly notificationHandlers;
    constructor(child: LspChildProcess, requestTimeoutMs?: number);
    /** Manager-visible liveness: evict + reopen instead of reusing a dead server (crashed / killed). */
    get closed(): boolean;
    private onMessage;
    /** design/121 {@link LspTransport.onNotification}: subscribe to server notifications; returns unsubscribe. */
    onNotification(handler: (method: string, params: unknown) => void): () => void;
    private failAll;
    private send;
    request(method: string, params: unknown, signal?: AbortSignal): Promise<unknown>;
    notify(method: string, params: unknown): void;
    close(): Promise<void>;
}
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