/**
 * Which document an observation belongs to.
 *
 * Evidence scoped by time and ring-buffer capacity alone lets a request observed under a PREVIOUS
 * document — or under a previous run of the application entirely — be counted against an action
 * taken now. That is a citation that is true about the bytes and false about the world, which is
 * the worst kind of wrong a verification tool can be.
 *
 * A document id is minted once per real document and dies with it. A full navigation replaces the
 * document and so replaces the id. An SPA route change does NOT, which is correct rather than a
 * limitation: same JavaScript context, same in-flight requests, same evidence.
 *
 * This lives in `core` because it crosses the wire, and every wire value is defined here.
 */
/**
 * Long enough not to collide within a session, short enough to stamp on every event.
 *
 * The cost is paid thousands of times per session, so this is a deliberate trade rather than a
 * default: eight base-36 characters is a little over forty bits, against a population of at most a
 * handful of documents per session. Collisions are not the risk being managed here; wire weight is.
 */
export declare const DOCUMENT_ID_LENGTH = 8;
/**
 * Mint an id for the current document.
 *
 * `random` is injected for the same reason the clock is: a generator that reaches for `Math.random()`
 * cannot be unit-tested and cannot be replayed, and this repo forbids both.
 */
export declare function newDocumentId(random: () => number): string;
/**
 * Does this evidence belong to the document currently under observation?
 *
 * **Unstamped evidence counts as current.** An SDK older than this field stamps nothing, and
 * excluding it would make those installations silently stop reporting real contradictions. A
 * verification tool that quietly finds nothing is far worse than one that occasionally over-reports,
 * and this change exists to remove quietly-wrong answers rather than to trade one kind for another.
 */
export declare function isSameDocument(evidenceDocumentId: string | undefined, currentDocumentId: string | undefined): boolean;