During March 2025, Daniel Howarth enhanced the IRAM eigensolver in the lattice/quda repository by introducing a configurable QR tolerance parameter, qr_tol, to improve numerical stability in large-scale lattice simulations. He implemented this feature in C++ using advanced linear algebra libraries and numerical methods, deriving the default qr_tol value from the main eigenvalue tolerance and adding warnings for potentially unstable configurations. By adjusting the default and warning thresholds to eig_tol * 1e-3, Daniel reduced the risk of unstable convergence and minimized manual tuning for users. This work provided a robust, non-breaking improvement to the eigensolver’s reliability and user experience.