/**
 * WorkGraph scaffold apply engine — applies validated scaffold proposals to storage.
 *
 * Takes a validated scaffold proposal (saga/epic/tasks + edges/relations) and
 * writes them to the SQLite database in a single transaction. Idempotent —
 * re-applying the same scaffold does not create duplicates.
 *
 * @task T10633
 * @saga T10538
 * @epic T10547
 */
import type { WorkGraphScaffoldApplyParams, WorkGraphScaffoldApplyResult } from '@cleocode/contracts';
/** Stable error code for apply failures where the scaffold is invalid. */
export declare const E_WORKGRAPH_SCAFFOLD_APPLY_INVALID = "E_WORKGRAPH_SCAFFOLD_APPLY_INVALID";
/** Stable error code for apply failures where a referenced parent does not exist. */
export declare const E_WORKGRAPH_SCAFFOLD_APPLY_MISSING_PARENT = "E_WORKGRAPH_SCAFFOLD_APPLY_MISSING_PARENT";
/** Stable error code for apply failures where the database is not initialized. */
export declare const E_WORKGRAPH_SCAFFOLD_APPLY_NO_DB = "E_WORKGRAPH_SCAFFOLD_APPLY_NO_DB";
/**
 * Apply a validated WorkGraph scaffold proposal to storage.
 *
 * Runs validation first using {@link validateWorkGraphScaffold}. When the
 * scaffold is valid and `params.apply` is `true`, all nodes and edges are
 * written to the database inside a single transaction.
 *
 * **AC1 — transactional**: all writes succeed or none do. If any insert
 * fails, the entire transaction is rolled back.
 *
 * **AC2 — idempotency**: uses `ON CONFLICT DO NOTHING` for task, dependency,
 * and relation inserts. Re-applying the same scaffold produces the same
 * result without duplicates.
 *
 * **AC3 — docs and relations created consistently**: all task rows (docs)
 * and their dependency/relation edges are written in the same atomic
 * transaction, so consumers never see a partially-applied scaffold.
 *
 * @param params - Scaffold payload to apply. Must include `apply: true` to
 *   perform writes; omit or set `false` for dry-run preview.
 * @returns Structured apply result with validity, applied status, and change
 *   counts.
 */
export declare function applyWorkGraphScaffold(params: WorkGraphScaffoldApplyParams): Promise<WorkGraphScaffoldApplyResult>;
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