/**
 * host domain contract. No protocol version: client and host ship
 * together; introduce protocolVersion only when an independently released client appears.
 */
import type { RpcRequest, RpcResponse } from './rpc.ts';
/** One directory row of a listing: a child entry or a breadcrumb ancestor. */
export interface DirectoryEntry {
    /** Base name shown in a browser row (a root crumb carries its full path). */
    name: string;
    /** Absolute host path — the client never joins path segments itself. */
    path: string;
    /** Hidden by the host platform's convention (dot-prefixed on POSIX); the client owns whether to show it. */
    hidden: boolean;
}
/** host.listDirectory response value: one directory level plus its ancestry. */
export interface DirectoryListing {
    /** Absolute path of the listed directory. */
    path: string;
    /** The host account's home directory (breadcrumb "Home" rooting). */
    home: string;
    /**
     * Ancestor chain from the filesystem root to the listed directory
     * inclusive; every crumb is a jump target (crumb `hidden` is always false).
     */
    crumbs: DirectoryEntry[];
    /** Direct child directories, name-sorted; symlinks to directories included. */
    entries: DirectoryEntry[];
    /** True when the backend cut `entries` at its complete-result bound (the name-sorted tail is absent). */
    truncated: boolean;
}
/** Host-level unary methods. */
export interface HostApi {
    /**
     * One-shot host snapshot. Empty payload uses the literal `{}` (extend in place when fields arrive).
     * version = the host app's (apps/cli) package.json version; cwd = the host process working
     * directory (root for session persistence and tool execution); provider/model = the defaults
     * applied when a new agent doesn't specify them explicitly, absent when the host configures
     * no explicit default (the adapter falls back internally);
     * attachedSessions = count of currently attached sessions (those with a live agent);
     */
    describe(request: RpcRequest<{}>): Promise<RpcResponse<{
        version: string;
        cwd: string;
        provider?: string;
        model?: string;
        attachedSessions: number;
    }>>;
    /**
     * Open the operating system's single-directory picker; cancellation returns
     * null. Only served under the `native` capability.
     */
    pickDirectory(request: RpcRequest<{}>, signal: AbortSignal): Promise<RpcResponse<{
        path: string | null;
    }>>;
    /**
     * List one directory level for the in-app browser; an absent path lists the
     * host account's home directory. Only served under the `browse` capability;
     * unreadable or missing targets fail with `directory-unreadable`. The
     * carrier's request signal follows the caller, stopping the backend's scan
     * on disconnect or timeout.
     */
    listDirectory(request: RpcRequest<{
        path?: string;
    }>, signal: AbortSignal): Promise<RpcResponse<DirectoryListing>>;
    /**
     * Create one child directory under an existing parent (the browser's
     * "New folder"). Only served under the `browse` capability; an existing
     * child fails with `directory-exists`, every other filesystem failure with
     * `directory-create-failed`.
     */
    createDirectory(request: RpcRequest<{
        path: string;
        name: string;
    }>): Promise<RpcResponse<{
        path: string;
    }>>;
    /**
     * Open a filesystem path with the operating system's default application
     * (Finder / Explorer / xdg-open hand-off). The browser carrier's
     * prefix-wide trust fence covers this privileged method like every other
     * `/api` request.
     */
    openPath(request: RpcRequest<{
        path: string;
    }>, signal: AbortSignal): Promise<RpcResponse<{
        opened: true;
    }>>;
}
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