/**
 * Prose-only ratio calculator — Slice C Group G3 (v2.14.0),
 * corrected in S3 of the 2026-09-15 diagnosis-remediation job.
 *
 * An entry counts as prose-only when `backing === 'prose-only'`.
 * Full stop. There is no second condition.
 *
 * The pre-S3 version also required `informational !== true`, on the
 * reasoning that auto-discovered advisory SKILL.md phrases are "not
 * actionable red lines". Whatever the merits of that reading, the effect
 * was to move 44 of 152 rows — 29% of the catalog — out of the
 * denominator, so the gate reported `proseOnly: 0` while the same JSON
 * carried 44 rows with `"backing": "prose-only"`. A metric whose
 * denominator can be redefined by the code it measures is not a metric.
 *
 * `informational` survives as a triage label — `discoveredProseOnly`
 * below counts those rows — but it no longer moves any number that the
 * ratio is computed from. Expect the ratio to look much worse than it
 * did; that is this correction working.
 *
 * Karpathy §2 simplicity: one exported function plus a thin calculator
 * interface; no I/O.
 */
import type { RedLineEntry } from './types.js';
export interface ProseRatioResult {
    /** Total entries considered (entries.length) — the denominator, always. */
    readonly totalRedLines: number;
    /** Count of entries with backing === 'cli-backed'. */
    readonly cliBacked: number;
    /** Count of entries with backing === 'partial'. */
    readonly partial: number;
    /** Count of entries with backing === 'prose-only'. THE numerator. */
    readonly proseOnly: number;
    /**
     * Breakdown only — the subset of `proseOnly` that carries
     * `informational: true` (auto-discovered advisory phrases with no
     * catalog template). Included in `proseOnly`; changing it changes
     * nothing about `proseOnly` or `ratio`.
     */
    readonly discoveredProseOnly: number;
    /** Count of entries with informational === true, whatever their backing. */
    readonly informational: number;
    /** proseOnly / totalRedLines. Returns 0 when totalRedLines === 0. */
    readonly ratio: number;
    /** Target threshold (default 0.05 per A3.1). */
    readonly target: number;
    /** True when ratio > target. */
    readonly exceeds: boolean;
}
export interface ProseRatioOptions {
    /** Target threshold (default 0.05). */
    readonly target?: number;
}
/** Default target: 5% (per A3.1). */
export declare const DEFAULT_PROSE_RATIO_TARGET = 0.05;
export declare function computeProseRatio(entries: readonly RedLineEntry[], options?: ProseRatioOptions): ProseRatioResult;