Echo-tier knobs. k: anchor length (MLX_BUN_FILL_K, default 8 — the corpus
study's token-level threshold). candidates: nearest-occurrence bucket cap
(MLX_BUN_FILL_CANDIDATES, default 24). indexMax: token cap on the growing
index (MLX_BUN_FILL_INDEX_MAX, default 131072).
Echo-tier knobs. k: anchor length (MLX_BUN_FILL_K, default 8 — the corpus study's token-level threshold). candidates: nearest-occurrence bucket cap (MLX_BUN_FILL_CANDIDATES, default 24). indexMax: token cap on the growing index (MLX_BUN_FILL_INDEX_MAX, default 131072).