export type MigrationStepKind = "move" | "rename" | "generate" | "remove" | "update" | "note";
export interface MigrationStep {
    kind: MigrationStepKind;
    from?: string;
    to?: string;
    description: string;
    payload?: unknown;
}
export interface MigrationPlan {
    steps: MigrationStep[];
    warnings: string[];
    irreversible_changes: string[];
    estimated_disk_delta_mb: number;
}
export interface VerifyResult {
    ok: boolean;
    error?: string;
}
export interface Migration {
    /** Source version spec (e.g. "0.1.x" matches 0.1.0–1.1.*). */
    from: string;
    /** Target version (e.g. "0.2.2"). */
    to: string;
    description: string;
    detect(workspace: string): Promise<boolean>;
    plan(workspace: string): Promise<MigrationPlan>;
    apply(workspace: string, plan: MigrationPlan): Promise<void>;
    verify(workspace: string): Promise<VerifyResult>;
}
export interface BackupMeta {
    workspace: string;
    source_version: string;
    target_version: string;
    created_at: string;
    migration_chain: string[];
}