/**
 * summarizeTiers() — "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. Tiers:
 *   trivial              — same_change, delete_no_change, one_side_change,
 *                           non_overlapping, whitespace_only, reorder_only,
 *                           insertion_at_boundary, value_only_change, generated_file
 *   advancedDeterministic — refactoring_aware_merge, token_level_merge
 *   model                 — llm_proposed
 *   unresolved            — complex
 */
export {};
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