picol: A Tcl interpreter in 500 lines of code
Picol is a Tcl-alike interpreter in 500 lines of code that I released 15th of March 2007. Recentely I looked at the source code and realized this was a better C programming example compared to what I recalled, so I’m putting this on GitHub to archive it, together with the main points of the original […]
Building SQLite with a small swarm
February 12, 2026 tl;dr I tasked Claude, Codex, and Gemini to build a SQLite-like engine in Rust. ~19k~ lines of code. Parser, planner, volcano executor, pager, b+trees, wal, recovery, joins, aggregates, indexing, transaction semantics, grouped aggregates, and stats-aware planning all implemented. 282 unit tests, all passing. background Treat software engineering like distributed systems, and force […]
JavaScript-heavy approaches are not compatible with long-term performance goals
This post is a (very long) opinion piece, albeit one that I hope is somewhat substantiated by the accompanying anecdotes. The TL;DR is that in my experience the title is a correct statement the vast majority of the time, and we should favour more server-centric approaches instead, when possible. What I mean by “JS-heavy approaches“ […]
Error payloads in Zig
Feb 13, 2026 I do error payloads in Zig by making a union(enum)-based Diagnostics type for each function. These types have special methods which remove code bloat at call sites. A Diagnostics type can be defined inline, and the errorset can be generated inline from the Diagnostic’s enum tag. pub fn scan( db: *c.sqlite, diag: […]
Magnus Carlsen Wins the Freestyle (Chess960) World Championship
Magnus Carlsen (Norway) is the 2026 FIDE Freestyle Chess World Champion. A draw in the fourth and final game against Fabiano Caruana (USA) was enough to seal a 2.5–1.5 match victory in Weissenhaus, Germany. The decisive moment came in game three. Carlsen won from a dead lost position, turning the match in his favor. Entering […]
I’m joining OpenAI
tl;dr: I’m joining OpenAI to work on bringing agents to everyone. OpenClaw will move to a foundation and stay open and independent. The last month was a whirlwind, never would I have expected that my playground project would create such waves. The internet got weird again, and it’s been incredibly fun to see how my […]
GNU Pies – Program Invocation and Execution Supervisor
The name Pies (pronounced ”p-yes”) stands for Program Invocation and Execution Supervisor. This utility starts and controls execution of external programs, called components. Each component is a stand-alone program, which is executed in the foreground. Upon startup, pies reads the list of components from its configuration file, starts them, and remains in the background, controlling […]
Show HN: VOOG – Moog-style polyphonic synthesizer in Python with tkinter GUI
Virtual Analog Synthesizer — a Moog-style polyphonic synthesizer built in Python with a tkinter GUI inspired by the Subsequent 37. ┌─────────────────────────────────────────────────────────────────┐ │ VOOG VIRTUAL ANALOG SYNTHESIZER │ ├─────────────────────────────────────────────────────────────────┤ │ OSC 1 OSC 2 OSC 3 NOISE │ │ (Oct)(Semi) (Oct)(Semi) (Oct)(Semi) (Lvl) │ │ (Det)(Lvl) (Det)(Lvl) (Det)(Lvl) │ ├─────────────────────────────────────────────────────────────────┤ │ FILTER FILTER ENV AMP ENV […]
Towards Autonomous Mathematics Research
Abstract:Recent advances in foundational models have yielded reasoning systems capable of achieving a gold-medal standard at the International Mathematical Olympiad. The transition from competition-level problem-solving to professional research, however, requires navigating vast literature and constructing long-horizon proofs. In this work, we introduce Aletheia, a math research agent that iteratively generates, verifies, and revises solutions end-to-end […]
Palantir Gets Millions of Dollars from New York City’s Public Hospitals
New York City’s public hospital system is paying millions to Palantir, the controversial ICE and military contractor, according to documents obtained by The Intercept. Since 2023, the New York City Health and Hospitals Corporation has paid Palantir nearly $4 million to improve its ability to track down payment for the services provided at its hospitals […]