import type { CommsMessage } from "./comms-types.js";
export declare const COMMS_THREAD_SCHEMA = "humanish.comms-thread.v1";
export interface CommsThreadEntry {
    id: string;
    channel: CommsMessage["channel"];
    /** sha256-16 of the raw sender address. */
    fromDigest: string;
    /** sha256-16 of each recipient inbox address. */
    toDigests: string[];
    /** sha256-16 of the subject (non-reversible for a PII subject; correlates identical subjects). */
    subjectDigest?: string;
    /** sha256-16 of each actionable link (high-entropy → non-reversible). */
    linkDigests: string[];
    /** COUNT ONLY — a short OTP's digest is reversible, so the code itself never lands here. */
    codeCount: number;
    sentAt: number;
    deliveredAt: number;
}
export interface CommsThreadArtifact {
    schema: typeof COMMS_THREAD_SCHEMA;
    channel: CommsMessage["channel"];
    count: number;
    thread: CommsThreadEntry[];
}
/** Project polled inbox messages into the digest-only thread artifact. Pure; the caller writes it into
 *  the run dir and registers it as an adapter-artifact. */
export declare function buildCommsThreadArtifact(messages: CommsMessage[]): CommsThreadArtifact;