This month in hax november description.

Author: maximebuyse

docs/blog/posts/this-month-in-hax/2025-11.md

@@ -7,7 +7,11 @@ date: 2025-12-01
 
 In November, we successfully merged **16 pull requests**!
 
-<DESCRIPTION>
+The frontend continues getting improvements thanks to [@Nadrieril](https://github.com/Nadrieril). 
+So does the lean backend, with support for default methods and lib improvements including renaming the `Result` monad to `RustM`.
+The lib has been the focus as we now have started incorporating the new core models written in Rust. 
+A first batch of changes already happened in November and are automatically extracted to the F* library (manually for lean).
+We continue the development of these models which will hopefully cover all we already have in the F* lib as manual F* models.
 
 ### Full list of PRs
 * \#1778: [Change impl_u64__rotate_right second parameter type to u32](https://github.com/cryspen/hax/pull/1778)

engine/lib/import_thir.ml

@@ -1189,6 +1189,7 @@ end) : EXPR = struct
   (* fun _ -> Ok Bool *)
 
   and c_impl_expr (span : Thir.span) (ie : Thir.impl_expr) : impl_expr =
+    Logs.info (fun m -> m "span: %s" ([%show: Thir.span] span));
     let goal = c_trait_ref span ie.trait.value in
     let impl = { kind = c_impl_expr_atom span ie.impl goal; goal } in
     match ie.impl with