/**
 * Message store engine — write, read, and list message files.
 * Spec: §4.4 — Message File Schema
 */
import type { Message, Labels } from "@pi-orca/core";
export interface WriteMessageParams {
    title: string;
    from: string;
    to: string;
    body: string;
    labels?: Labels;
    projectSlug?: string;
}
export interface MessageFile {
    message: Message;
    body: string;
    filePath: string;
}
export interface ListMessagesFilter {
    from?: string;
    to?: string;
    labels?: Labels;
    limit?: number;
    projectSlug?: string;
}
/**
 * Write a message to the store directory.
 *
 * Generates a `msg-<uuid>` filename, computes the date-based subdirectory
 * (store/YYYY/MM/DD/), and writes a markdown file with YAML frontmatter.
 *
 * @param params - Message parameters
 * @returns Resolved message file with metadata
 */
export declare function writeMessage(params: WriteMessageParams): Promise<MessageFile>;
/**
 * Read a single message by ID.
 *
 * Walks all `.md` files under the store directory, parses frontmatter,
 * and returns the first match.
 *
 * @param messageId - Message ID to look up
 * @param projectSlug - Optional project slug
 * @returns Message file or null if not found
 */
export declare function readMessage(messageId: string, projectSlug?: string): Promise<MessageFile | null>;
/**
 * List messages with optional filters.
 *
 * Walks all `.md` files, parses frontmatter, applies filters, sorts by
 * sentAt descending, and applies limit.
 *
 * @param filters - Optional filter criteria
 * @returns Filtered and sorted message files
 */
export declare function listMessages(filters?: ListMessagesFilter): Promise<MessageFile[]>;
//# sourceMappingURL=store.d.ts.map