/**
 * pi-bus deliver API — pure filesystem primitives for inter-pi messaging.
 *
 * Extracted from extensions/bus/index.ts so non-extension callers (cron
 * triggers, CLI scripts, other extensions) can drop messages into a session's
 * inbox without booting a full pi extension.
 *
 * What lives here:
 *   - Path helpers (busRoot, sessionsRoot, ownSessionDir, inboxDir)
 *   - Session meta + inbox message schemas
 *   - Pure I/O: readMeta, listLiveSessions, findByName, writeInboxMessage,
 *     readInbox, generateMsgId
 *
 * What stays in the extension:
 *   - generateName (auto-generated friendly name; only used at session registration)
 *   - writeMeta, updateHeartbeat (write your own meta; tied to closure scope)
 *   - deliverIncoming, startInboxWatch, shutdown (tied to pi extension lifecycle)
 *
 * If you're writing a script that needs to drop a message into a session's
 * inbox, import from this file. Example:
 *
 *   import { findByName, writeInboxMessage, generateMsgId } from "@shog-lab/pi-bus/lib/deliver";
 *   const found = findByName("alice");
 *   if (!("error" in found)) {
 *     writeInboxMessage(found.id, {
 *       id: generateMsgId(),
 *       from: "cron",
 *       body: "wake up",
 *       sentAt: new Date().toISOString(),
 *     });
 *   }
 */
import { type Static } from "@sinclair/typebox";
export declare const HEARTBEAT_INTERVAL_MS = 30000;
export declare const STALE_AFTER_MS = 90000;
export declare const MAX_BODY_BYTES = 16000;
export declare const SessionMetaSchema: import("@sinclair/typebox").TObject<{
    name: import("@sinclair/typebox").TString;
    pid: import("@sinclair/typebox").TNumber;
    cwd: import("@sinclair/typebox").TString;
    joinedAt: import("@sinclair/typebox").TString;
    heartbeatAt: import("@sinclair/typebox").TString;
}>;
export type SessionMeta = Static<typeof SessionMetaSchema>;
export declare const InboxMessageSchema: import("@sinclair/typebox").TObject<{
    id: import("@sinclair/typebox").TString;
    from: import("@sinclair/typebox").TString;
    body: import("@sinclair/typebox").TString;
    sentAt: import("@sinclair/typebox").TString;
}>;
export type InboxMessage = Static<typeof InboxMessageSchema>;
export declare function busRoot(): string;
export declare function sessionsRoot(): string;
export declare function ownSessionDir(sessionId: string): string;
export declare function inboxDir(sessionId: string): string;
export declare function readMeta(sessionId: string): SessionMeta | null;
/** List live sessions (stale-filtered). Excludes `excludeId` if given (yourself). */
export declare function listLiveSessions(excludeId?: string): SessionMeta[];
/** Look up a live session by name. Returns null if not found / stale / ambiguous. */
export declare function findByName(name: string, excludeId?: string): {
    id: string;
    meta: SessionMeta;
} | {
    error: string;
};
export declare function generateMsgId(): string;
export declare function writeInboxMessage(targetSessionId: string, msg: InboxMessage): void;
export declare function readInbox(sessionId: string, consume: boolean): InboxMessage[];
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