/**
 * ADR Backfill Walker — T1829
 *
 * One-time idempotent script that parses every `.cleo/adrs/*.md` (and the 9
 * unique ADRs in `docs/adr/`) and creates a `brain_decisions` row for each one.
 *
 * ## Usage
 *
 * ```bash
 * # Dry-run (no writes):
 * node packages/core/dist/tools/adr-backfill-walker.js --dry-run
 *
 * # Apply (writes to brain.db):
 * node packages/core/dist/tools/adr-backfill-walker.js --apply
 * ```
 *
 * ## Idempotency
 *
 * Rows are skipped when an existing `brain_decisions` row already has
 * `adrNumber` populated for that ADR number.  The check is transactional:
 * `SELECT … WHERE adr_number = ?`.
 *
 * ## Collisions (ADR-051..054)
 *
 * The four ADR numbers 051–054 each have two conflicting files in two
 * different directories. This walker uses `.cleo/adrs/` as the canonical
 * SSoT (per Epsilon audit decision) and SKIPS the `docs/adr/` versions.
 * A note is written to the report for each skipped collision.
 *
 * ## Duplicates (ADR-031/033, ADR-032/034)
 *
 * ADR-033 duplicates ADR-031 and ADR-034 duplicates ADR-032. The first
 * number is kept as canonical; the second is inserted with
 * `supersededBy = <first>` and `confirmationState = 'superseded'`.
 *
 * @task T1829
 * @epic T1824
 */
interface WalkerResult {
    adrNumber: number;
    filename: string;
    filePath: string;
    action: 'inserted' | 'skipped-exists' | 'skipped-collision' | 'skipped-error';
    note?: string;
    decisionId?: string;
    supersedureTo?: string;
}
/**
 * Main walker function.
 *
 * @param projectRoot - Absolute path to the project root.
 * @param dryRun      - When true, no writes are performed.
 * @returns Array of results per ADR file processed.
 */
export declare function runAdrBackfillWalker(projectRoot: string, dryRun: boolean): Promise<WalkerResult[]>;
export {};
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