OpenCode – The open source AI coding agent

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OpenCode is a free, open-source coding agent available on macOS, Windows, and Linux, trusted by 5M developers. It offers private coding with reliable AI models through its Zen platform, ensuring consistent performance and quality.

Our commitment to Windows quality

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Microsoft is making changes to Windows 11 to improve performance, reliability, and user experience, including taskbar customization, AI integration, and reduced Windows Update disruption. The company is focusing on making Windows 11 more responsive, consistent, and secure, with a goal of delivering better experiences with greater confidence, month after month.

Discontinuation and reinitiation of dual-labeled GLP-1 receptor agonists

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Researchers found that stopping GLP-1 weight-loss drugs leads to increased heart attack and stroke risk, with benefits not fully returning after restarting. Discontinuation of GLP-1s causes a lasting scar on heart health, highlighting the need for better adherence and treatment plans.

We rewrote our Rust WASM Parser in TypeScript – and it got 3x Faster

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The team initially built a WASM parser in Rust for a custom DSL, but found that the boundary overhead between WASM and JS dominated the computation time. They ported the parser to TypeScript and optimized the streaming architecture to reduce the number of parse calls, resulting in a significant performance improvement.

I love my dumb watches

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The author initially liked smartwatches but found them redundant and addictive, leading to a preference for traditional automatic watches. They now appreciate the simplicity and durability of mechanical watches.

France's aircraft carrier located in real time by Le Monde through fitness app

Contactez licensing[@]groupelemonde.fr pour obtenir une autorisation d'accès. Incluez une copie de la page d'erreur avec votre adresse IP et votre identifiant de requête (RID).

Show HN: We built a terminal-only Bluesky / AT Proto client written in Fortran

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Fortransky is a terminal Bluesky client written in Fortran with a Rust decoder. It connects to Bluesky via Jetstream or relay-raw streams with session state saved in ~/.fortransky/session.json.

Ghostling

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Ghostling is a demo project showcasing libghostty's flexibility in a single C file using Raylib for windowing and rendering. It's a minimal viable terminal based on libghostty, not a full-featured daily use terminal, and demonstrates the library's embeddable and high-performance capabilities.

Attention Residuals

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Attention Residuals (AttnRes) is a drop-in replacement for standard residual connections in Transformers that enables selective aggregation of earlier representations via learned attention. It consistently outperforms the baseline across all compute budgets and mitigates PreNorm dilution.

Show HN: Baltic shadow fleet tracker – live AIS, cable proximity alerts

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The Shadow Fleet Tracker Light monitors 1200+ vessels from the Ukrainian GUR catalogue against live AIS data, plotting positions on a self-updating map. It detects Russia-West transshipment patterns and flags proximity to undersea cables.

The Los Angeles Aqueduct Is Wild

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The Los Angeles Aqueduct is a 300-mile gravity-fed system that brings water from the Eastern Sierra to LA, but its construction and operation have been marked by controversy and environmental impact. The aqueduct's design and expansion have had significant effects on the Owens Valley and surrounding ecosystems, highlighting the need for careful consideration of costs beyond the balance sheet.
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Offline MGRS navigation and proximity team coordination for small teams (2-8 people). No cell service needed. Built on the MGRS engine from Red Grid MGRS. Field Link adds zero-config proximity sync over Bluetooth and WiFi Direct -- your team appears on the map the moment they're in range. Live Military Grid Reference System coordinates with 1-meter precision. GPS Kalman filter for smooth, ...

Show HN: I made an email app inspired by Arc browser

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define brings email, chat, meetings, docs, and video together—so teams decide faster, switch less, and stay in flow.

VisiCalc Reconstructed

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The user discusses rebuilding a minimal VisiCalc clone from scratch, focusing on a data model, formula evaluator, and simple UI to display cells, and implements a recursive descent parser to calculate formulas on the fly. The user also implements a basic UI using the ncurses library, allowing users to navigate through cells, edit them, and display their values, with features like ...

An FAQ on Reinforcement Learning Environments

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This post is a collaboration between guest author Chris Barber and JS Denain from Epoch AI. Reinforcement learning (RL) environments have become central to how frontier AI labs train their models. In September 2025, The Information reported that Anthropic had discussed spending over $1 billion on RL environments over the following year. As Andrej Karpathy put it in his 2025 year-in-review: by ...

Work_mem: It's a Trap

Henrietta Dombrovskaya's Postgres cluster was killed by the OOM killer after consuming 2 TB of RAM due to a badly written query that accumulated memory in a single context. The issue was caused by the query's design, not a Postgres bug, and can be mitigated by fixing the query, using query timeouts, and monitoring with pg_log_backend_memory_contexts.

NumKong: 2'000 Mixed Precision Kernels for All

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The author has released a new open-source project called NumKong, which is a collection of over 2,000 SIMD kernels for mixed precision numerics, and has discussed the state of RISC-V, Intel's Advanced Matrix Extensions (AMX), and Apple's Scalable Matrix Extensions (SME). The author has also compared NumKong to other libraries such as OpenBLAS and Eigen, highlighting its advantages in terms of ...

A Japanese Glossary of Chopsticks Faux Pas

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Using chopsticks in certain ways is considered taboo in Japan, including passing food between pairs and holding them between hands when saying thanks. Proper etiquette involves eating rice first, then side dishes, and placing chopsticks on a rest when finished.

Parallel Perl – Autoparallelizing interpreter with JIT

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The user discusses issues with CPAN and PBP, and their decision to use STM32F103 instead of ATmega328 for faster performance. They also mention their use of CAN protocol, Perl, and Rust for various projects and tasks.

Delve – Fake Compliance as a Service

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Delve, a compliance company, uses fake evidence and fabricated audit reports to make companies appear compliant with frameworks like SOC 2, ISO 27001, HIPAA, and GDPR. Delve's platform relies on pre-populated templates, manual forms, and dodgy auditors to produce reports that falsely claim independent verification, putting clients at risk of criminal liability and hefty fines.

The worst volume control UI in the world (2017)

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Developers and designers on Reddit created a thread to come up with the worst volume control interface ideas for fun. The exercise helps strengthen creative muscles and think outside the box.

Entso-E final report on Iberian 2025 blackout

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On 28 April 2025, a total blackout occurred in continental Spain and Portugal, with disruptions in a small area of Southwest France. An Expert Panel investigated the incident and released a final report on 20 March 2026 with recommendations to prevent similar events.

Meme Buildings

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The author discusses meme buildings, which are structures that endear themselves to the public despite lacking architectural significance. These buildings often have a unique appearance or nostalgic value.

Launch HN: Sitefire (YC W26) – Automating actions to improve AI visibility

Vincent and Jochen from sitefire developed a platform to improve brand visibility in AI search by analyzing and optimizing content for AI search engines. Their platform generates synthetic prompts, analyzes AI search results, and creates optimized content to increase AI bot requests and human referrals to clients' pages.

The Social Smolnet

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User implemented social features in Offpunk after realizing blogs and email already formed a decentralized social network. Offpunk allows users to share and reply to online content with simple email commands.

Show HN: An open-source safety net for home hemodialysis

Safehemo is a pre-alpha demonstration for home dialysis, connecting patients, clinics, and communities in a secure ecosystem. It provides real-time monitoring and alerts for critical events, but is not a medical device and should not be used in emergencies.

Video Encoding and Decoding with Vulkan Compute Shaders in FFmpeg

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FFmpeg uses Vulkan Compute to accelerate encoding and decoding of professional-grade video on consumer GPUs, unlocking GPU compute parallelism at scale without specialized hardware. This approach complements Vulkan Video's fixed-function codec support, extending acceleration to formats and workflows it doesn't cover, making it an ideal starting point for making compute-based codec ...

Monkey C – Small familiar language for apps on Garmin watches

Monkey C

Flash-KMeans: Fast and Memory-Efficient Exact K-Means

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Researchers improved k-means algorithm for online use by addressing GPU bottlenecks through flash-kmeans, a new implementation. It achieves up to 17.9x speedup over best baselines and outperforms industry-standard libraries.

Super Micro Shares Plunge 25% After Co-Founder Charged in $2.5B Smuggling Plot

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