/**
 * Parent-first table ordering for legacy copies — a dependency-free leaf.
 *
 * Lives outside `migrate.ts` so the tasks-domain store (`sqlite.ts` →
 * `legacy-tasks-lineage.ts`) can use it without pulling the exodus engine —
 * whose recovery module loads `node:sqlite` at import — into the store's
 * module graph (T1331 lazy-init contract; T12355).
 *
 * @module
 */
import type { DatabaseSync } from 'node:sqlite';
/**
 * Order a legacy DB's tables so every referenced (parent) table is copied
 * before the tables that reference it, using the SOURCE schema's foreign keys.
 *
 * `foreign_keys=OFF` defers FK enforcement during the bulk copy, but it does NOT
 * defer triggers. The consolidated project schema carries `BEFORE INSERT` guards
 * that look the parent up in `tasks_tasks` — e.g.
 * `tasks_task_acceptance_child_target_insert` raises
 * `E_CHILD_TASK_TARGET_CONTAINMENT` unless the criterion's child task already
 * exists. Alphabetical order copied `task_acceptance_criteria` BEFORE `tasks`,
 * so every legitimate `child_task` criterion was rejected and the whole
 * migration aborted, leaving `cleo.db` empty (T12319: 493 valid criteria in
 * llmtxt, zero actual violations in the source).
 *
 * Kahn's algorithm with alphabetical tie-breaking keeps the order deterministic;
 * self-references and references to tables outside the set are ignored, and a
 * cycle releases its alphabetically-first member so progress continues.
 *
 * @param db - Read-only handle on the legacy source DB.
 * @returns Table names, parents before children.
 * @task T12319
 */
export declare function orderTablesForCopy(db: DatabaseSync): string[];
/** Quote an SQLite identifier. */
export declare function ident(name: string): string;
/** Whether `schema.table` exists on `db`. */
export declare function hasTable(db: DatabaseSync, schema: string, table: string): boolean;
/** Row count of `schema.table`. */
export declare function countRows(db: DatabaseSync, schema: string, table: string): number;
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