/**
 * Fold an instance's spec delta into the corpus (living-spec-corpus/AC-10).
 *
 * `planFold` reads and computes; `applyFold` is the only writer. The split is
 * what makes a fold all-or-nothing: every file's new content exists in memory
 * before the first write, so a conflict found in the last block leaves the
 * corpus exactly as it was (living-spec-corpus/AC-11), and `--dry-run` and the
 * completion check in `aidlc transition` are the same computation as the real
 * fold rather than a second copy of it.
 *
 * Preconditions are checked against the corpus as it is *before* the fold, for
 * every block, so the conflict list is complete — not just the first one found.
 *
 * Requirements: living-spec-corpus/AC-10, living-spec-corpus/AC-11,
 * living-spec-corpus/AC-12, living-spec-corpus/AC-13,
 * living-spec-corpus/AC-14, living-spec-corpus/AC-17
 */
import type { FoldPlan } from './types.js';
/** The archive record already written for this instance, if any (AC-13). */
export declare function findArchiveRecord(projectRoot: string, instance: string): string | null;
/**
 * Compute what folding `instance` would do. Throws only when the instance name
 * is not a single path segment or the instance does not exist.
 */
export declare function planFold(projectRoot: string, instance: string, now?: Date): FoldPlan;
/** Write a ready plan; anything else is a no-op. Archive record last (design D5). */
export declare function applyFold(plan: FoldPlan): void;
/** One line per error or conflict, for the CLI and for transition violations. */
export declare function describeIssues(plan: FoldPlan): string[];
//# sourceMappingURL=fold.d.ts.map