Default injection is now the paper's slerp(eps_refined, eps_random,
noise_lambda) per pixelrush-correct.txt. The 2026-08-13 additive mode
(eps_pred + lambda*eps_rand) remains available via
noise_injection='additive' (node combo input) for workflows tuned
against it. Tests pin both formulas exactly via seeded randn streams
(lambda=0 -> pure eps, lambda=1 -> pure random, additive formula),
the slerp default, and invalid-mode rejection. The legacy-calibrated
HF tests are pinned to additive; a new slerp-mode HF guard holds the
provisional >=0.5 bound pending Step 11 calibration.
WildAi
8b1bfc2bcc