import type { SessionEvidenceSource, SessionEvidenceSourceOptions, SessionTextEvidenceSource } from './types.js';
/**
 * A fixed end of the log a source reads up to: a record the capturing writer
 * vouches for. Appends after it do not change what the source sees.
 */
export interface EvidenceAnchor {
    readonly seq: number;
    readonly offset: number;
    readonly length: number;
    readonly sha256: string;
}
/**
 * @experimental Bounded, authenticated evidence over one explicitly authorized
 * session log, or one turn of it. Closed by default (no active turn in scope);
 * snapshot mode also reads a session whose turn is running, without assuming
 * its writer is dead. The host owns authorization and the log's directory.
 * Changes to the log invalidate addresses; record and chunk digests detect
 * changed bytes. This is not a hostile filesystem sandbox.
 */
export declare function createSessionTextEvidenceSource(options: SessionEvidenceSourceOptions): SessionTextEvidenceSource;
/**
 * @internal A text source anchored at a record the writer holds: appends
 * after it neither invalidate its addresses nor become visible to it.
 */
export declare function createAnchoredSessionTextEvidenceSource(options: SessionEvidenceSourceOptions, anchor: EvidenceAnchor): SessionTextEvidenceSource;
/** @experimental Tool-only view of the shared session text index. */
export declare function createSessionEvidenceSource(options: SessionEvidenceSourceOptions): SessionEvidenceSource;
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