/**
 * AgentEvent → SessionEvent mapping (D-P2-4, scope §3).
 *
 * The pi-agent-core `AgentEvent` runtime shape was verified before this
 * mapping was written (scope §7 risk): `agent_start, turn_start,
 * message_start, message_update×N, message_end, turn_end, agent_end` for a
 * text turn, with `tool_execution_start/update/end` interleaved for tool
 * turns. `message_update` carries the pi-ai `AssistantMessageEvent` whose
 * `type` discriminates the field-addressed delta (`text_delta`/`thinking_delta`
 * with `contentIndex`) — that `contentIndex` becomes the `partId` on the
 * OpenKai `delta` event.
 *
 * The mapping is a pure function: `mapAgentEvent(event) → SessionEvent[]`.
 * The transport owns `seq` assignment (monotonic) and `sessionId` injection so
 * this module stays side-effect-free and testable.
 */
import type { AgentEvent } from "@earendil-works/pi-agent-core";
import type { SessionEvent } from "./transport.js";
/**
 * Distributive Omit — `Omit` does not distribute over unions, so a plain
 * `Omit<SessionEvent, …>` collapses to the common keys only. This distributes
 * over each variant, preserving the discriminant fields.
 */
type DistributiveOmit<T, K extends keyof any> = T extends any ? Omit<T, K> : never;
/** A SessionEvent with its `sessionId`/`seq` metadata stripped (caller fills them). */
export type StrippedSessionEvent = DistributiveOmit<SessionEvent, "sessionId" | "seq">;
/**
 * Map one {@link AgentEvent} to zero or more {@link StrippedSessionEvent}s.
 * The caller stamps `sessionId` and assigns `seq` (ascending from 1).
 *
 * Returns an array because `turn_end` emits a usage snapshot, an optional
 * `error` event (when the settled assistant message carries stopReason
 * "error" or an errorMessage), and a turn marker. The common case is exactly
 * one output event.
 */
export declare function mapAgentEvent(event: AgentEvent): StrippedSessionEvent[];
export {};
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