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+---
+authors:
+  - lucas
+title: "This Month in Hax: January 2025"
+date: 2025-02-10
+---
+
+
+This blog post continues our ongoing series introduced in the [previous blog of
+hax](https://hacspec.org/blog/tags/this-month-in-hax/), a monthly collection of
+highlights showcasing key developments in hax and its ecosystem.
+
+This month, we merged **31 pull requests** and celebrated a major milestone by
+releasing the first official version of hax:
+[v0.1.0](https://github.com/cryspen/hax/releases/tag/cargo-hax-v0.1.0). If you
+haven’t already, be sure to check out [our blog post](../announce-v0.1.md) for
+more details on this release!
+
+We tackled a variety of bug fixes and engine improvements. One significant
+achievement was resolving a long-standing issue related to the inconsistent
+preservation of declaration orders between Rust and the extractions. This
+problem [was finally fixed](https://github.com/cryspen/hax/pull/1247). 🎉
+
+Additionally, we merged [a comprehensive
+overhaul](https://github.com/cryspen/hax/pull/1199) of how identifiers are
+treated and represented within the engine. This rework allowed us to fix nearly
+ten related issues, making the system more robust and efficient.
+
+In the F\* backend, we transitioned away from using
+[HACL\*](https://github.com/hacl-star/hacl-star) machine integers. Instead, we
+now rely on a [thin wrapper](https://github.com/cryspen/hax/pull/1238) over
+F\*'s native mathematical integers. Unlike HACL\*'s opaque machine integers,
+this new representation allows us to use F\*'s normalizer freely, offering a
+cleaner and more lightweight solution.
+
+Stay tuned for more updates in the coming months!
+
+### Full list of PRs
+
+* \#1278: [ci(gha): drop magic-nix-cache action because of EOL](https://github.com/cryspen/hax/pull/1278)
+* \#1277: [fix(mkdocs): use codemirror instead of ace, re-setup on page reload](https://github.com/cryspen/hax/pull/1277)
+* \#1275: [Create CODEOWNERS](https://github.com/cryspen/hax/pull/1275)
+* \#1273: [Various F* core lib additions.](https://github.com/cryspen/hax/pull/1273)
+* \#1267: [fix(hax-lib/macros): handle correctly `&mut Self` arguments in `ensures`](https://github.com/cryspen/hax/pull/1267)
+* \#1265: [Fix announce-v0.1.md](https://github.com/cryspen/hax/pull/1265)
+* \#1263: [updatge readme and docs](https://github.com/cryspen/hax/pull/1263)
+* \#1261: [Update website landing page](https://github.com/cryspen/hax/pull/1261)
+* \#1260: [chore(deps): bump hashbrown from 0.15.0 to 0.15.2](https://github.com/cryspen/hax/pull/1260)
+* \#1259: [changelog: initialize](https://github.com/cryspen/hax/pull/1259)
+* \#1258: [Delete frontend/exporter/json-visualizer directory](https://github.com/cryspen/hax/pull/1258)
+* \#1247: [Stable topological sort using original order.](https://github.com/cryspen/hax/pull/1247)
+* \#1245: [Release hax v0.1.0](https://github.com/cryspen/hax/pull/1245)
+* \#1241: [hax v0.1 blog post](https://github.com/cryspen/hax/pull/1241)
+* \#1238: [Transparent integers](https://github.com/cryspen/hax/pull/1238)
+* \#1237: [Fix order of `Call` trait clauses](https://github.com/cryspen/hax/pull/1237)
+* \#1236: [Add more info to `ImplExprAtom::Builtin`](https://github.com/cryspen/hax/pull/1236)
+* \#1230: [fix(engine) Propagate return rewrite to avoid crash in side_effect_utils](https://github.com/cryspen/hax/pull/1230)
+* \#1229: [fix(engine) Add type arguments for associated constants.](https://github.com/cryspen/hax/pull/1229)
+* \#1228: [fix(engine) Use ocamlgraph fork to fix missing rec bug.](https://github.com/cryspen/hax/pull/1228)
+* \#1225: [Hax home page using mkdocs](https://github.com/cryspen/hax/pull/1225)
+* \#1223: [fix(engine) Attempt to fix double return bug.](https://github.com/cryspen/hax/pull/1223)
+* \#1222: [Make predicate handling a bit more consistent](https://github.com/cryspen/hax/pull/1222)
+* \#1220: [Visit trait goals to rename impl expr they may contain.](https://github.com/cryspen/hax/pull/1220)
+* \#1216: [Update README.md: `unsafe` is OK to use](https://github.com/cryspen/hax/pull/1216)
+* \#1215: [Fix generics handling for function calls](https://github.com/cryspen/hax/pull/1215)
+* \#1212: [fix(CI) Update F* version to fix mlkem CI job ](https://github.com/cryspen/hax/pull/1212)
+* \#1206: [fix(engine) Make sub-parts of `Quote` visited by visitors](https://github.com/cryspen/hax/pull/1206)
+* \#1199: [Engine: rework global name representation](https://github.com/cryspen/hax/pull/1199)
+* \#1075: [Move trait methods in cyclic dependencies bundling.](https://github.com/cryspen/hax/pull/1075)
+* \#1066: [Add EBNF for AST to book](https://github.com/cryspen/hax/pull/1066)
+
+### Contributors
+* [@Nadrieril](https://github.com/Nadrieril)
+* [@W95Psp](https://github.com/W95Psp)
+* [@app/dependabot](https://github.com/app/dependabot)
+* [@cmester0](https://github.com/cmester0)
+* [@franziskuskiefer](https://github.com/franziskuskiefer)
+* [@karthikbhargavan](https://github.com/karthikbhargavan)
+* [@maximebuyse](https://github.com/maximebuyse)