Automatic way to get nav mesh to climb wall

I am looking for a way to make my AIs climb walls.

I know I could place some NavLinkProxy with specific NavArea which trigger a special move to my AIs.
But I seek better solution.

Firstly, placing all the NavLinkProxy is a fastidious work for the LD (And is not an exact science).
Secondly, the NavLinkProxy link two edges in a unique point, and the AI cross the edges by this point instead of use all the width of the edges.

Of course, a solution is, in code, browsing all the edges to automaticaly place the navlink. (separate by one meter)
But I prefer to find a way in the navmesh generation. (I don’t want change Agent Max Step Height which is ridiculous.)

So if anybody know a solution I take it.
Thanks.

I’m also looking for any information on NavLinkProxy and NPC climbing.

Finaly the way I use is to hack Recast library to add automatically segment nav link between contours. It took me 5 weeks to implement this solution. It is not perfect but it works.

Wtf, five weeks?

hey,is there any more detail?