/**
 * Induction quality: frontmatter backfill + per-type induction depth audit (#1504).
 *
 * TS-native port of section9 `backfill_frontmatter.py` + `audit_inductions.py`.
 * The audit is **source-type-aware** (#1509): required-section checks come from
 * the source-type registry, so a blog isn't flagged for missing "Benchmark
 * Results" and a repo is checked for "Architecture"/"Maintenance Signals". This
 * is the audit consumer that demonstrates the #1509 registry end-to-end.
 *
 * Reconciles with `research-quality-audit` (GRADE evidence quality) and
 * `best-practices-audit` (corpus-wide best practices): this is the structural +
 * depth + per-type-section induction check, not a GRADE assessment.
 *
 * @source historical: corpus/audit_inductions.py, corpus/backfill_frontmatter.py
 * @tests @test/unit/artifacts/induction-audit.test.ts
 */
export interface AuditResult {
    ref: string;
    analysisExists: boolean;
    analysisLines: number;
    sidecarExists: boolean;
    pdfExists: boolean;
    pdfExcluded: boolean;
    sourceType: string;
    depthBand: string;
    missingSections: string[];
    issues: string[];
}
export interface AuditOptions {
    start?: number;
    end?: number;
    refs?: string[];
}
export declare function auditInductions(root: string, opts?: AuditOptions): AuditResult[];
export declare function renderAudit(results: AuditResult[]): string;
export interface BackfillResult {
    changed: string[];
    skippedExisting: number;
    holdouts: Array<{
        ref: string;
        missing: string;
    }>;
}
/** Additive frontmatter backfill: skips docs that already have frontmatter. */
export declare function backfillFrontmatter(root: string, opts?: {
    write?: boolean;
    date?: string;
}): BackfillResult;
export declare function renderBackfill(r: BackfillResult, write: boolean): string;
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