import type * as acp from '@agentclientprotocol/sdk';
import type { AdapterMeta, ConversationEventKind, ConversationPayload } from './conversation-types.js';
/**
 * Reduce one ACP v1 `session/update` into one conversation-domain event draft.
 *
 * This is the protocol seam: v1 create/update pairs (and a future v2 upsert
 * stream) both land in the same domain shapes. The function is pure and total —
 * it never throws, never passes raw wire objects through, caps every payload,
 * and quarantines namespaced `_meta` so unknown extensions cannot leak into
 * generic rendering paths.
 */
/** Cap for any single normalized text payload. */
export declare const MAX_TEXT_BYTES: number;
/** Cap for each retained side of an oversized snapshot-style file diff. */
export declare const MAX_DIFF_TEXT_BYTES: number;
/** Cap for attacker-controlled filesystem paths while retaining their useful basename tail. */
export declare const MAX_PATH_BYTES: number;
/** Hard cap for the complete normalized update before the durable event envelope is added. */
export declare const MAX_NORMALIZED_UPDATE_BYTES: number;
/** Cap for one adapter `_meta` namespace value. */
export declare const MAX_META_BYTES: number;
/** Cap for serialized raw tool input/output retained as structured JSON. */
export declare const MAX_RAW_JSON_BYTES: number;
/** Cap for the sanitized preview of an unsupported update. */
export declare const MAX_UNSUPPORTED_PREVIEW_CHARS = 2048;
export interface NormalizeOptions {
    /**
     * Replace every text payload with this placeholder, keeping byte count and
     * digest. Used for scheduled-loop turns whose output must not be retained.
     */
    redactText?: string;
    /**
     * Replace ACP tool-call IDs in both the normalized event correlation field
     * and payload. The caller may still use the original update for in-memory
     * lifecycle tracking without persisting its private identifier.
     */
    redactToolCallId?: string;
}
export interface NormalizedUpdate {
    kind: ConversationEventKind;
    payload: ConversationPayload;
    messageId?: string;
    toolCallId?: string;
    adapterMeta?: AdapterMeta[];
}
export declare function normalizeSessionUpdate(update: acp.SessionUpdate, options?: NormalizeOptions): NormalizedUpdate;