Alvaro Lopez Ortega / 2026-07-25 Briefing

Created Sat, 25 Jul 2026 13:04:00 +0000 Modified Sat, 25 Jul 2026 13:04:41 +0000
1636 Words

Unitree shipped 5,500 humanoid robots in 2025 (25% global share) and prepares Shanghai IPO. Candid Health raised $120M for AI medical billing. Modi turned to raw selfie Reels amid student protests over exam leaks. Google proposes restricting on-device ADB, affecting Shizuku and accessibility tools.

🛠️ Developer Tools & Hacks

A shell colon does nothing. Use it anyway

The article demonstrates how combining the null command : with parameter expansion ${1:?message} can replace a multi-line if-statement for checking required arguments in a shell script. It also highlights the versatile uses of the null command, such as setting default values, truncating files, and checking file readability or writability.

Emacs Writing Machine

The author repurposed an old ThinkPad running Debian without a desktop environment, booting directly into Emacs with Markdown mode and deft, to create a distraction-free writing machine. The minimal setup uses Git and Codeberg for file syncing, helping the author overcome attention issues and finish blog drafts.

Sending packets directly from BPF

Tetragon’s BPF-based monitoring depends on a user-space agent to forward data, creating a vulnerability if the agent is killed. Developers proposed using netpoll to let BPF programs send UDP packets directly to remote servers, bypassing user-space, but concerns remain about UDP’s lack of network stack controls and potential bandwidth contention.

stinkpot: sqlite-backed shell history

Stinkpot is a compact SQLite-backed shell-history searcher for bash, written in about 400 lines of Go and modeled after atuin but with a narrower feature set focused on session-agnostic history management and a reverse-search TUI. It can be set up via a NixOS home-manager module or by evaluating its init script in .bashrc, and users import existing bash history with the stinkpot import command.

the perils of parsing type inference declarations in c

A parsing ambiguity in C23 causes GCC and Clang to disagree on declarations like auto x = 67 when x is a typedef: GCC treats it as a storage-class specifier and errors, while Clang correctly shadows the typedef. The standard lacks explicit disambiguation, and adding attributes further complicates parsing, with neither compiler backtracking when initial assumptions are wrong.

I’m running the ICFP programming contest (2026)

The 29th annual ICFP Programming Contest has begun, running for 3 days, and introduces a new language called “littleman” that uses spatial reasoning with two-dimensional programs where instructions are physically walked over. The contest is designed to prevent unmonitored AI agents from winning by requiring manual interaction. A free textbook on the language is available to everyone.

🤖 AI & Robotics

Hangzhou’s Unitree shipped 5,500 humanoid robots in 2025 (25%+ global share), preps for Shanghai IPO

Unitree, a Hangzhou-based humanoid robotics firm, shipped over 5,500 humanoid robots in 2025, capturing more than a quarter of the global market. The company is now preparing for a Shanghai IPO, as its founder Wang Xingxing continues to push innovation from robot dogs to humanoid robots and the new GD01 mecha robot. Unitree leads in volume as the humanoid robotics industry rapidly expands, with predictions of up to 13 million units by 2035.

Candid Health raised $120M Series D led by Sixth Street Growth for AI medical billing automation

Candid Health raised a $120 million Series D led by Sixth Street Growth, tripling its valuation and bringing total funding past $219 million. The company uses AI agents to automate medical billing for healthcare providers, helping claims get paid correctly the first time. Annual recurring revenue grew 190% year over year, with net revenue retention near 200%.

Neocloud Fluidstack raises $830M Series A at $7.5B, led by Situational Awareness, Anthropic partner

Fluidstack Ltd., which partners with Anthropic on AI data center construction, raised $830 million in a Series A round led by Situational Awareness at a $7.5 billion valuation. The company aims to reduce data center build times to six months using prefabricated modules and robotics, and it plans to build $50 billion worth of AI infrastructure in the U.S.

ARC-AGI Leaderboard

The ARC-AGI-3 leaderboard evaluates AI agents on adapting to novel interactive environments, measuring the relationship between cost-per-task and performance. It categorizes solutions into reasoning systems, base LLMs, and Kaggle systems operating under strict compute constraints. Only systems costing less than $10,000 to run are shown, with preview results considered unofficial.

“We removed over 80% of Claude Code’s system prompt for Opus 5 and Fable 5”

The page displays a browser verification check that takes a few seconds. If the test fails, users are instructed to whitelist extensions, update their browser, or email antibot@unixfox.eu with their browser information and a reference ID.

🔒 Security & Privacy

Android Restricts On-Device ADB

A Google ADB maintainer has proposed restricting on-device ADB connections to prevent abuse, which would affect legitimate uses like Shizuku-based apps, accessibility tools, and call recording. Affected users are urged to provide constructive feedback rather than spamming the issue tracker.

UK AISI / Caisi Preliminary Assessment of Kimi K3’s Cyber Capabilities

The UK AISI and US CAISI evaluated Moonshot AI’s Kimi K3 model, finding it outperformed other open-weight models on the ExploitBench benchmark (32% vs 24%) but failed to achieve arbitrary code execution on any of 41 tasks, unlike top models which succeeded on 20/41 tasks overall. Kimi K3’s cyber capability estimate has a larger confidence interval because it was derived from a single benchmark.

DentaQuest breach notices sent to 15 million after health data theft

DentaQuest notified nearly 15 million people that hackers accessed sensitive personal and health data, including over 1.7 million unique Social Security numbers, most belonging to children. The May breach, claimed by the ShinyHunters gang, exposed insurance information and medical diagnoses, with notifications sent starting July 17.

🌐 Society & Culture

Amid student protests, Modi swaps cinematic videos for self-recorded Reels targeting Gen Z

Prime Minister Narendra Modi has shifted from his usual cinematic videos to raw, self-recorded Instagram Reels to address growing student protests over an exam paper leak scandal. In two selfie videos, he called the leaks “extremely painful” and vowed to punish those harming students’ futures.

Meta pauses plan to rate-limit Conversation Focus, an accessibility feature, after backlash.

Meta has paused its plan to charge a $20 monthly subscription for Conversation Focus, an on-device accessibility feature for its Ray-Ban smart glasses, following user backlash. The feature will remain free for early testers while the company explores other approaches, though Meta still intends to introduce subscription fees for some premium features in the future.

Extinct Media Museum Tokyo

The Extinct Media Museum in Tokyo is a private, hands-on museum housing over 4,000 obsolete media items, with 3,000 on permanent display and 80% donated. It specializes in home-use motion picture cameras from film to digital, and also features a basement library of 3,000 product catalogs. Visitors can freely touch, photograph, and scan items, while 90% of the collection is accessible via a free online database.

🤪 Weird & Wonderful

BOFH: This printer engineer knows every trick in the book

A printer engineer is confident in his knowledge of every trick in the book, but he soon discovers that the customer is equally savvy and can match him move for move. The article details the ensuing battle of wits between the two.

MouthPad: A Tongue-Controlled Touchpad

MouthPad is a discreet, hands-free touchpad worn inside the mouth that translates tongue and head movements into cursor control, clicks, and scrolling. It connects via Bluetooth to multiple devices and is custom-fit from a dental scan. Developed with input from users with diverse abilities, it aims to enhance digital independence.

Man convicted of child sex crime by added _ char “Fus Ro Dah” Skyrim username

Brandon Klayme was wrongfully convicted of child luring and possession of child pornography after police mistook his username “fus_ro_dah” (one underscore) for a nearly identical username with two underscores. He spent 18 months in jail before Nova Scotia’s top court discovered the error during his appeal and acquitted him, stating he was factually innocent and should never have been charged.

🔬 Science & Research

Hannah Fry Wins the Leelavati Prize in 2026 for Mathematics Outreach

Professor Hannah Fry has been awarded the 2026 Leelavati Prize at the International Congress of Mathematicians for her outstanding work in increasing public awareness of mathematics. She is the first person to hold the role of Professor of the Public Understanding of Mathematics at the University of Cambridge, and the prize citation praised her creativity in making mathematics accessible and wondrous for the public.