The speaker warns that retaining many model-specific failure modes in a running log may over-constrain Claude, since a failure in Fable 5 may not occur in Fable 5.1.

“do this on purpose you know i mean it's just like how the models work right and so like maybe like fable 5 had this like failure mode that fable 5.1 doesn't and if you keep this context running log of a bunch of different failure modes they will probably over constrain claude you know and so this is like”