How to Break LambdaCDM

One-page challenge to ΛCDM. Starting from the COW experiment (gravity couples to quantum phase), a single disorder weight derived via Tsallis non-extensive mechanics is inserted into the Einstein equation. The resulting source term, scaled by the rigid constant α0=2.618, accounts for flat rotation curves, cluster lensing morphology, and aspects of cosmic acceleration without particle dark matter or a cosmological constant. Full derivations are given in the primary record: Zenodo 21741195.