export interface ProjectConfig {
    projectId: string;
    projectName?: string;
    root: string;
}
/**
 * Resolve project configuration from a project ID.
 *
 * Resolution strategy (via projectRegistry):
 * 1. Check registry for exact ID or alias match
 * 2. Check DECIBEL_PROJECT_ROOT env var
 * 3. Check if projectId is a valid absolute path
 * 4. Walk up from cwd looking for matching project
 *
 * @param projectId - The unique identifier for the project (ID, alias, or path)
 * @returns The project configuration including root path
 * @throws Error if the project cannot be resolved
 */
export declare function resolveProjectRoot(projectId: string): Promise<ProjectConfig>;
/**
 * List all known project IDs.
 * Returns projects from the registry plus any discovered from cwd.
 *
 * @returns Array of discovered project IDs
 */
export declare function listProjectIds(): string[];
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