Myers O(ND) forward/backtrack over line vectors (dict-vec), edit script
{:op eq|del|add :line}, reconstruction invariants both sides, paper example
D=5 verified; unified hunks with context 3, merged ranges, exact header
math for empty sides; tree/commit structural diff over flattened trees;
whole-commit unified render. 27/27, total 159/159.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
