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Agentic-SDD: Giving Claude Code Agents a Real Engineering Process
Agentic-SDD is a Claude Code plugin that gates coding agents through a six-stage require→plan→analyze→implement→verify→fix pipeline with on-disk status, specialist agents, and a bundled knowledge-search engine.
6 min · 1,303 words
OxCaml - Stack Allocations and Locality
The motivation behind OxCaml is to make OCaml a great language for performance engineering, with the eventual goal being to upstream these language extensions to vanilla OCaml (OxCaml](https://oxcaml.org/)). OxCaml maintains backwards compatibility with OCaml, which implies that every OCaml program is a valid OxCaml program. The language extensions range from additions to the type system that rule out data races, to control over allocations that reduces garbage collection pressure, to management
7 min · 1,697 words
What Makes LLM Tokenization Slow?Exploring the performance of byte-pair encoding by optimizing a GPT-2 tokenizer.
Andrew Healey dissects GPT-2’s reference BPE tokenizer, measures what makes tokenization slow, and shows concrete optimizations on the hot path of LLM products.
11 min · 2,547 words
Python 3.15 ships with a new profiler. It is called Tachyon, it lives in the standard library as the profiling.sampling module, and unlike cProfile it is a sampling profiler rather than a tracing one. I now have a set of hands-on workshops for it, which you can find at github.com/GrahamDumpleton/tachyon-workshops or on the workshops page of this site, and they have reached the point where I am happy for other people to do them. That said, they were not written for other people in the first place. They were written so I could learn Tachyon myself, and the reason I wanted...
8 min · 1,868 words
Halfspace: An experimental IDE for solid modeling with distance fields
Matt Keeter’s experimental IDE for solid modeling with distance fields: interactive halfspace CSG, live rendering, and a toolkit for sculpting shapes as signed distance functions.
6 min · 1,448 words
Git 3.0's upcoming SHA-256 default will be a costly mistake
Git 3.0 will make SHA-256 the new default content hashing algorithm and it will be an incomprehensibly expensive and ultimately valueless and avoidable global nightmare.
17 min · 3,902 words
zenkai: The App Launcher I Wrote Because I Wanted Something Fast and Beautiful
Dayvster builds zenkai, a Zig + Qt6 cross-platform app launcher with ~140ms startup (sometimes ~20ms), 65+ themes, Lua plugins, and a sandbox—written as a hobby performance deep dive.
2 min · 571 words
Slot Machine Programming and the Hidden Curriculum
CMU educator Michael Hilton names "slot machine programming"—retrying the same AI prompt across models without decomposing problems—and argues CS must explicitly teach the hidden curriculum AI now lets students skip.
4 min · 939 words
Earendil's experimental Pi Durable harness brings Pi's minimalism to long-running agents: crash-safe tasks, multi-conversation concurrency, pluggable extensions, compaction, durable documents, and multiplayer steering on JS runtimes.
5 min · 1,053 words
Earendil ships Pi 1.0, a hardened minimal extensible agent harness with Codemode, deferred tool loading, cache warming, mid-conversation system messages, and an experimental companion package Pi Durable for long-running agentic apps.
2 min · 532 words
How to speed up the Rust compiler in September 2026
How to speed up the Rust compiler in September 2026 My last post](https://nnethercote.github.io/2026/07/31/how-to-speed-up-the-rust-compiler-in-july-2026.html) on the Rust compiler’s performance was two months ago and a lot has happened since then. Overall progress The measurements for the period 2026-07-29 to 2026-09-28 can be seen here](https://perf.rust-lang.org/compare.html?start=1a833e16546c2eb012758ddd499964fd8afee29e&stat=wall-time&tab=compile&end=c1070d69382b8d2f2eb65119c738a77d9e324c9e&
5 min · 1,212 words
Garbage Collection: Generational? Incremental? Both!
The third Language Summit talk was brought by Mark Shannon, who is the author of the incremental garbage collector implementation shipped in Python 3.14 that was reverted back to the generational garbage collector from Python 3.13 after reports of “significant memory pressure” in production environments. The original goal of the new incremental garbage collector was to reduce maximum pause times by an order of magnitude for larger heaps.
5 min · 1,173 words
A Spring AI tutorial on hardening agents for production: guardrails, evaluation loops, observability, tool authorization, and human-in-the-loop approval beyond a basic MCP-connected demo.
17 min · 3,953 words
Edward Kmett's week-old Turbo Haskell Compiler (THC) JITs GHC Core onto Truffle/GraalVM, supports AOT Native Image, polyglot FFI, Loom green threads, and can compile pandoc, happy, alex, and GHC itself.
2 min · 506 words
Effect 4.0 rebuilds the TypeScript effect system from the ground up: zero-dependency core, ~5× smaller bundles, ~6.4× concurrent throughput, 86% less memory per fiber, and a long-term support policy through at least 2029.
2 min · 433 words
Codex is now in preview in the ChatGPT mobile app so you can monitor, steer, and approve coding tasks in real time across devices and remote environments.
4 min · 983 words
HydraFusion in VS Code and the GitHub Copilot app
The HydraFusion research preview is now available in Visual Studio Code and the GitHub Copilot app, expanding beyond Copilot CLI. HydraFusion appears in the model picker, but rather than being…
2 min · 389 words
01 Fiscal sponsorship Receive and manage donations on behalf of EDG. The EDG open source transition On September 30, 2026, the source for EDG's C++ front end goes public, and The C++ Alliance becomes its nonprofit home. Same engine, same standards, professionally maintained, and open to contributions. Continuity is the point. This is a change of steward, not a change of course.
3 min · 730 words
We are thrilled to announce the latest release of Gitea v28.0.0. Gitea drops the historical 1. prefix from its version numbers, so this release is 28.0.0 rather than 1.28.0. Highlights include audit logging, bot accounts, HTTPS deploy tokens, user impersonation for administrators, codeowner approval rules, diff file filters, and an Actions queue view. See the changelog for everything else.
18 min · 4,204 words
Rust is the answer to the wrong question
Rust is the answer to the wrong question The below was 100% written by a human. TL;DR: porting an app to another language is merely an anecdote. One shoting an application from scratch optimizes the easy part initial authoring and completely misses the point on the hard part: maintenance. Repeated onshots are not the answer to security vulnerabilities.
5 min · 1,063 words