ToolboxDerived

keep/drop/evolve return full native states, validated as bona fide

3/3 passed in 0ms

Test	What it does	Result
test_matches_direct	Epr(0.8).keep([0]) and Thermal(sinh^2 0.8) give the same covariance, mean, purity and homodyne samples down one thermal-loss channel.	✅ pass
test_methods_survive	Displace, squeeze, rotate, beamsplitter, thermal loss, conditioning and both detectors all run on a state from keep, drop or evolve.	✅ pass
test_moments_validated	from_moments refuses diag(0.1, 0.1) -- quadrature product 0.01 below 1/4, caught only by V + i*Omega/2 >= 0 -- plus a wrong shape and a non-symmetric covariance.	✅ pass