/**
 * Compute a portable content fingerprint for a paragraph's raw visible text.
 *
 * Algorithm: `sha256:nfkc:` + first 32 hex chars of
 *   `sha256( stripInvisibles(NFKC(text)).replace(/\s+/g, " ").trim() )`.
 *
 * Order matters:
 *   1. NFKC first so compatibility whitespace (NBSP, ideographic space) is
 *      normalized to ASCII space and ligatures/full-width Latin decompose.
 *   2. Strip Cf-category invisibles (soft hyphen, ZWJ, ZWNJ, LRM/RLM, bidi
 *      controls, variation selectors, BOM) so byte-level round-trip noise
 *      doesn't change the hash without changing the visible glyphs.
 *   3. Whitespace collapse + trim.
 *
 * Case is preserved — citation systems need to distinguish "Section 5" from
 * "section 5". Curly quotes / en-dashes / ellipses are NOT folded to ASCII;
 * legal practice distinguishes them.
 *
 * The output is read-only metadata, not an edit anchor. Edit tools accept only
 * `_bk_*` paragraph IDs.
 *
 * The 128-bit truncation (32 hex) is collision-safe at any realistic
 * citation-corpus scale; the `sha256:nfkc:` prefix reserves space for future
 * algorithm bumps (e.g. `sha256:nfkc-strip:`). Consumers SHOULD store and
 * compare the full prefixed string so an algorithm bump cleanly invalidates
 * old hashes.
 */
export declare function computeContentFingerprint(rawVisibleText: string): string;
//# sourceMappingURL=content_fingerprint.d.ts.map