/**
 * Notification delivery for parent sessions.
 *
 * Re-activated in Phase 16.2 for terminal-state delegation notifications.
 * Provides fire-and-forget SDK prompt delivery with structured payload.
 *
 * Audit: G-01 closed as by-design (2026-04-21)
 */
import { type OpenCodeClient } from "../../shared/session-api.js";
import type { Delegation } from "../../shared/types.js";
import type { TaskNotification } from "../../shared/types.js";
export declare function buildNotificationMessage(task: TaskNotification): string;
export declare function formatToastMessage(task: TaskNotification): string;
/**
 * Reactivate a stopped parent session stream by sending an empty async prompt.
 *
 * Reserved for Step 3 (stream reactivation). Uses `sendPromptAsync()` instead of
 * `sendPrompt()` to avoid blocking and avoid unnecessary response handling.
 * Best-effort: if reactivation fails, notification is still delivered.
 */
export declare function reactivateSessionStream(client: OpenCodeClient, sessionID: string): Promise<void>;
/**
 * Deliver a notification to the parent session using two mechanisms:
 *
 * 1. **Toast** - `showTuiToast()` — user-visible, transient, agent-invisible
 * 2. **Context injection** - `sendPromptAsync()` — fire-and-forget message that
 *    agent sees in its context window. Uses `noReply: true` (no AI auto-response).
 *
 * Step 1 of the notification redesign (2026-05-23):
 * - Replaces `appendTuiPrompt()` with `showTuiToast()` — fixes input pollution bug
 * - Replaces `sendPrompt()` with `sendPromptAsync()` — no blocking, no response wait
 * - Removes `remove `synthetic: true` — it's a TextPart-level property, not message-level
 *
 * @param client - OpenCode SDK client
 * @param parentSessionID - The parent session to notify
 * @param task - Notification task payload
 * @returns `true` when context injection succeeds, `false` on failure
 */
export declare function notifyParentSession(client: OpenCodeClient, parentSessionID: string, task: TaskNotification): Promise<boolean>;
export declare function replayPendingNotifications(client: OpenCodeClient, parentSessionID: string, notifications: TaskNotification[]): Promise<boolean>;
/**
 * Fire-and-forget notification of a delegation's terminal state to its parent session.
 *
 * P59 C1/C2: Deduplicates completion notifications — if the same notification
 * message was already delivered for this delegation, skip re-injection. This
 * prevents the <system_reminder> tag from being re-inserted into the parent's
 * context on consecutive turns, which was the root cause of the agent-looping
 * behavior (observed: 7 consecutive identical messages within 2 minutes).
 *
 * Step 1 implementation:
 * - Uses `showTuiToast()` for user visibility
 * - Uses `sendPromptAsync()` for fire-and-forget context injection into parent session
 *
 * R-NOTIF-02: Payload contains taskId, terminalState, resultSummary, duration.
 * R-NOTIF-03: Delivery failure does NOT block the terminal transition.
 */
export declare function notifyDelegationTerminal(client: OpenCodeClient, delegation: Delegation): Promise<void>;
export type { TaskNotification };
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