/** Pieces missing BEFORE migrations run — full bundled surface (back-compat). */
export declare function missingExtensions(pool: any): Promise<string[]>;
/** Fact-provider missing extensions (vector / pg_textsearch / pg_durable). */
export declare function missingFactExtensions(pool: any): Promise<string[]>;
/** Graph-provider missing extensions (age). */
export declare function missingGraphExtensions(pool: any): Promise<string[]>;
/** Throw the itemized fail-fast error if any required extension is unavailable
 *  (full bundled surface — back-compat). */
export declare function assertExtensionsAvailable(pool: any): Promise<void>;
/** Fail-fast for the enhanced FACT provider (vector / pg_textsearch / pg_durable). */
export declare function assertFactExtensions(pool: any): Promise<void>;
/** Fail-fast for the GRAPH provider (age only). */
export declare function assertGraphExtensions(pool: any): Promise<void>;
/** Post-migration checks: df.http present and usable by this role. */
export declare function assertDurableHttpUsable(pool: any): Promise<void>;
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