/**
 * Shared parser for `platform/neo4j/schema.cypher`.
 *
 * Two consumers today:
 *   1. The admin SCHEMA prompt block (`platform/ui/app/lib/admin-schema-block.ts`)
 *      renders labels declared in schema.cypher into the agent's
 *      system prompt.
 *   2. The memory-plugin schema validator treats schema.cypher
 *      declarations as the "promise" half of the recognised-label set —
 *      labels that exist as constraints/indexes but may not yet have a node
 *      in the graph (fresh-install bootstrap).
 *
 * The previous home was admin-schema-block.ts; that owner was wrong as
 * soon as a second consumer arrived. Lifting here keeps a single source of
 * truth and removes the cross-package shape coupling.
 *
 * Also exports a compact `levenshtein` for "did you mean?" suggestions on
 * unknown labels — used by the memory-plugin validator. The graph-mcp
 * cypher validator has its own copy in schema-cache.ts (private to the
 * stale-miss heuristic); the duplication is intentional, since this
 * exported one targets human-readable error UX, not refresh debouncing.
 */
/**
 * Extract every Neo4j label declared in a `schema.cypher` file by scanning
 * `FOR (alias:Label)` and `FOR (alias:A|B|C)` constraint and index forms.
 * Returns a sorted, de-duped list. Pure function — no I/O.
 */
export declare function parseLabelsFromSchemaCypher(schemaCypher: string): string[];
/**
 * Standard iterative-DP Levenshtein. Used to suggest a near-match when an
 * agent submits an unknown label — small alphabets, short strings, runs in
 * microseconds. Identical algorithm to the private copy in schema-cache.ts;
 * exported here so callers outside graph-mcp don't have to roll their own.
 */
export declare function levenshtein(a: string, b: string): number;
/**
 * Find the closest label in `candidates` to `unknown` by edit distance.
 * Returns null when the closest match is further than `maxDistance` (default
 * 3) — beyond that a suggestion is more confusing than helpful.
 */
export declare function nearestLabel(unknown: string, candidates: Iterable<string>, maxDistance?: number): string | null;
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