/**
 * Save an architecture document to disk.
 * Overwrites any existing document with the same id.
 */
export declare function saveArchitecture(projectRoot: string, id: string, content: string): Promise<void>;
/**
 * Read an architecture document by id.
 * Throws if not found.
 */
export declare function readArchitecture(projectRoot: string, id: string): Promise<string>;
/**
 * Save an individual ADR file for an architecture.
 * ADRs are saved as separate files: <id>-adr-<N>.md
 */
export declare function saveADR(projectRoot: string, id: string, adrNumber: number, content: string): Promise<void>;
/**
 * Read all ADR files for an architecture, sorted by ADR number.
 * Returns an empty array if none exist.
 */
export declare function readADRs(projectRoot: string, id: string): Promise<string[]>;
/**
 * List all saved architecture IDs, sorted by filename.
 */
export declare function listArchitectures(projectRoot: string): Promise<string[]>;
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