/**
 * "Recoverable-before-model" metric (v2.7).
 *
 * Design: docs/superpowers/specs/2026-07-07-recoverable-before-model-metric-design.md §4.B
 *
 * Pure, derived summary over `MergeStats.byType` — NOT a change to resolution
 * logic. Answers: of the residual left after the cheap deterministic passes,
 * how much is still recoverable deterministically before the model is ever
 * invoked?
 *
 * Design note: these fields are deliberately NOT added to `MergeStats` —
 * that struct is a serialized public contract (CLI --json reports, MCP
 * output), and derived metrics stay derived. `summarizeTiers` is a TS-side
 * helper consumed separately by CLI/desktop/MCP. (An earlier revision cited
 * the Rust↔TS parity probe as the reason; that probe covers git commands,
 * not resolution structs — the contract argument is the real one.)
 */
import type { ConflictType } from "../types.js";
export type ResolutionTier = "trivial" | "advancedDeterministic" | "model" | "unresolved";
export interface TierSummary {
    byTier: Record<ResolutionTier, number>;
    /** advancedDeterministic + model + unresolved — everything past the cheap trivial passes. */
    residual: number;
    /** model + unresolved — the bucket a new deterministic pattern must shrink. */
    aiReachable: number;
    /** advancedDeterministic / residual, 0 when residual === 0 (never NaN/Infinity). */
    recoverableBeforeModel: number;
}
export declare function summarizeTiers(byType: Record<ConflictType, number>): TierSummary;
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