A bundle of 27M-parameter checkpoints (d_model 448, 8 layers) that back the paper's mechanistic results: the recovery ablation, the multi-epoch repetition ladder (1 to 20 epochs on a fixed 75M-token pool), the technique arms, and the fresh-data baselines. Each file is bfloat16, paired with its FP16 twin where relevant. These are provenance artifacts for reproducing the tables and figures, not standalone models. See https://github.com/lupodevelop/echo-1.58 for the code that consumes them and results/RESULTS.md for the numbers.