import type { StoreFootprint } from './render-facts.ts';
import type { ReachabilityIo } from '@lmzhen/dsh-evolution-core';
/**
 * The io surface this reading needs; a runtime without it yields UNKNOWN for every store.
 *
 * It EXTENDS the reachability read surface instead of restating it: this module drives those readings,
 * so the reads they need are the reads it needs. Restating them here is what produced the same
 * "argument not assignable" error three times - the surface now has ONE owner (`ReachabilityIo`) and this
 * adds only the probe the report sweep uses on top.
 */
export interface FootprintIo extends ReachabilityIo {
    mtime?(path: string): Promise<number | null>;
}
/**
 * Read what can be read, and say so for everything else.
 * @param io - the runtime io, or undefined when the caller has none (every store then reads UNKNOWN).
 * @returns one reading per registered store, in ledger order.
 */
export declare function reclamationFootprint(io: FootprintIo | undefined): Promise<StoreFootprint[]>;
/**
 * G3/3.4: the three reachability readings, folded into the footprint channel so the report has ONE shape.
 *
 * Paths come from the caller: the history root and the snapshot root live under the skills root, and the
 * reports directory under the evolution home. A runtime that does not state its skills root gets UNKNOWN
 * for the two rooted domains instead of a guess - the same three-state rule the rest of this file uses.
 * @param io - the runtime io, or undefined when the caller has none.
 * @param skillRoot - the configured skills root, or undefined when the runtime does not state one.
 */
export declare function reachabilityFootprint(io: FootprintIo | undefined, skillRoot: string | undefined): Promise<StoreFootprint[]>;
//# sourceMappingURL=footprint.d.ts.map