TWiR with AI summaries

This Week in Rust 633
Official
Cargo in 1.93 brings enhanced diagnostics with `annotate-snippets`, finer-grained target directory locking, stabilized config includes, and new structured logging for build analysis.
Rust is advancing its virtual places model with "canonical projections" using `@` syntax, "place wrappers" for non-indirected containers like `MaybeUninit`, and leaning towards "one-shot projections" for complex field access, with a new wiki for documentation.
Newsletters
This December 2025 Rust OSDev update highlights progress in projects like Xous, Asterinas, ratatui no-std support, and CLUU's microkernel transition, alongside bootloader and uefi-rs changes.
The Embedded Rustacean Issue #62 www.theembeddedrustacean.com
The Embedded Rustacean Issue #62 summarizes recent embedded Rust news, project reviews, educational resources, job postings, and upcoming events from January 2026.
Project/Tooling Updates
Danube Messaging's Schema Registry offers centralized message contract governance with versioning, compatibility, and multi-layer validation, featuring Rust SDK integration.
Fjall 3.0, a major release for the Rust LSM-tree key-value store (like RocksDB), introduces a new disk format, revamped APIs, and substantial improvements in performance and memory usage.
Observations/Thoughts
A Rust core contributor reflects on 2025, detailing 1160 upstream PRs that delivered significant compiler performance, build system, and infrastructure improvements.
Details Rust's type layout (e.g., `repr` attributes, niche optimizations, ZSTs), fat pointers for dynamically sized types, and the performance trade-offs between generics and trait objects for polymorphism.
A GitHub Actions workflow demonstrating comprehensive Rust testing, including unit, doc, Miri, and cross-platform tests for s390x.
Scaleway's CTO discusses their journey to become a European hyperscaler, their strategic adoption of Rust for low-level networking and storage in an AI-focused cloud, and his personal projects leveraging Rust for real-time, cross-platform applications.
Rust Walkthroughs
This article critiques common Rust error handling patterns, advocating for a dual approach that provides actionable error kinds for automated recovery and low-friction, context-rich error trees for human debugging, emphasizing context capture at module boundaries.
Leverage Rust's type system and design patterns to create "pit of success" APIs, making correct usage easy and incorrect usage impossible, exemplified by `rusty_paseto`.
A generic HTML boilerplate for a single-page application featuring Posthog analytics and the notable title 'EBADF'.
A Tokyo Rust talk offering a deep dive into Cargo's internals, build parallelization challenges, and its future direction.
Netstack.FM offers deep dives into networking, protocols, and infrastructure, all explored through the lens of Rust with expert interviews and crate spotlights.
Explores using `httpmock` to test Rust functions interacting with external HTTP APIs, highlighting the challenge of injecting mock server URLs without modifying public function signatures.
Examines the relevance of GoF design patterns in Rust, arguing many are unnecessary as Rust's features provide more idiomatic solutions to their underlying problems.
An introduction to Tock OS, covering Rust embedded tooling and QEMU setup for first boot.
Research
This document defines various Rust crate advisory diagnostics, including vulnerability, unsound, notice, unmaintained, and yanked, along with their implications for professionals.