Adds binary-mean: a 1-bit sign code thresholded at the per-coordinate mean rather than zero. A zero threshold assumes mean-centred data (LSH assumption A1); for off-centre embeddings like e5 it wastes most bits, and re-centring recovers them — e5 1-bit retention goes from 53% to 86% of float, while already-centred embedders barely move. The board now shows where the threshold is placed can matter as much as how many bits are spent. binary (zero threshold) stays for reproducibility.
Leaderboard: https://sjmoran.github.io/bitbudget/