  Upcoming full-sky large-scale structure surveys such as Euclid can probe the
primordial Universe. Using the specifications for the Euclid survey, we
estimate the constraints on the inflation potential beyond slow-roll. We use
mock Euclid and Planck data from fiducial cosmological models using the Wiggly
Whipped Inflation (WWI) framework, which generates features in the primordial
power spectrum. We include Euclid cosmic shear and galaxy clustering, with two
setups (Conservative and Realistic) for the non-linear cut-off. We find that
the addition of Euclid data gives an improvement in constraints in the WWI
potential, with the Realistic setup providing marginal improvement over the
Conservative for most models. This shows that Euclid may allow us to identify
oscillations in the primordial spectrum present at intermediate to small
scales.
