Dev shares hard lessons from migrating a real SaaS app to Next.js App Router

A developer documented the challenges of migrating a production SaaS application with thousands of active users from Next.js Pages Router to the App Router, a process that took three weeks and broke authentication twice. A key pitfall was 'use client' contagion, where a single directive cascaded through component imports and inadvertently converted most Server Components back into Client Components. The app's aggressive default caching behaviour caused stale data issues, such as profile pictures not updating, requiring the team to force dynamic rendering on authenticated routes before cautiously reintroducing caching. Third-party libraries dependent on browser APIs like 'window' also required custom wrapper components to function within the new server-side paradigm. Despite the difficult migration, the team ultimately saw a 40% drop in initial page load times and a significantly reduced JavaScript bundle size.

Automattic CEO Matt Mullenweg Placed on Leave of Absence

Matt Mullenweg, the CEO of Automattic and co-founder of WordPress, has been placed on a leave of absence, according to a report by 404 Media. The development marks a significant leadership moment for Automattic, the company behind WordPress.com and other web products. Further details regarding the circumstances or duration of the leave were not available in the provided source. The story was picked up by Hacker News, drawing community attention to the leadership change.

Supreme Court Urges CBSE to Exempt Class 6 Students from Three-Language Policy

The Supreme Court has once again called on CBSE to consider exempting Class 6 students from its mandatory three-language policy. The court reiterated its earlier stance, signaling continued judicial scrutiny of the board's language education requirements. The bench indicated that the broader question of whether English should be classified as a native or foreign language would require a more comprehensive hearing. The matter has been flagged as a significant policy issue that warrants detailed deliberation before a final ruling can be made.

Spain Had Prior Intelligence Warning Before Ceuta Mass Migrant Crossing

Declassified documents reveal that Spanish and Moroccan authorities received advance warning of a planned mass migrant crossing into Ceuta. Intelligence agencies had identified social media calls urging people to attempt the crossing before the surge occurred. The warnings came just one day before tens of thousands of migrants entered the Spanish enclave. Despite the prior intelligence, the crossing proceeded on a massive scale, raising questions about the response from both governments.

DEV Community Users Report Random Color Changes on Profile Icons

Some DEV Community users have noticed that the background color of their profile icons is changing unexpectedly. One user observed the background shift from yellow to red within a short period. The cause of the color changes is currently unknown, and no official explanation has been provided. The issue appears to have surfaced recently, prompting users to seek answers from the community.

Developer releases bigbullui v1.2.0: 659-component React library with zero dependencies

A developer has launched bigbullui v1.2.0, an open-source React component library featuring 659 copy-paste components, 63 page blocks, and 1,023 hand-drawn stroke icons. The library is built for React 19 and Tailwind v4, carries an MIT license, and has zero runtime dependencies beyond React and a small utility helper. Components can be added via npm, a dedicated CLI, or the shadcn CLI, and a scaffolding tool is also available to bootstrap new projects. The library includes an MCP server integration, allowing AI coding tools like Cursor and Claude Code to browse components and fetch source code locally without a backend. The project is publicly available and the developer is actively seeking community feedback on missing features or stack-specific needs.

UK Sanctions West Bank Settlers Amid Quiet US Response

The United Kingdom has imposed sanctions on Israeli settlers in the West Bank, accusing Israel's government of ignoring what it describes as the 'ethnic cleansing' of Palestinians. The measures signal a notable shift in British policy toward the Israeli-Palestinian conflict. The subdued reaction from the United States to the UK's move has drawn attention, suggesting possible underlying tensions between the two allies on the issue. Analysts interpret Washington's muted response as potentially reflecting growing frustration with Israeli settler activity in the occupied territory.

Sarah Michelle Gellar Cuts LA Home Price to $9.95M After 3 Months on Market

Actress Sarah Michelle Gellar and her husband Freddie Prinze Jr. have reduced the asking price of their Los Angeles property to $9.95 million. The Mandeville Canyon home was originally listed just three months ago at a higher price. The couple purchased the residence in 2013 and have been looking to sell the family home. The price reduction signals their eagerness to close a deal on the long-held property.

NYC Man's 100-Day Solo Cleanup Inspires Neighbours to Reclaim Their Block

David Clarke, a New York City resident, took it upon himself to clean a neglected block using basic tools over 100 days. He regularly shared his progress on social media, gradually attracting attention from the wider community. Clarke also spent his own money to build gardens in tree beds along the block. His efforts inspired neighbours to join in and help maintain the newly improved space. The grassroots initiative ultimately transformed the block and built a stronger sense of community pride.

OpenAI claims Millennium Prize math breakthrough amid academic scooping allegations

OpenAI announced on Tuesday that it has solved one of mathematics' Millennium Prize problems, a landmark achievement in the field. However, the announcement was clouded by controversy before it was even formally made public. Reports suggest OpenAI rushed to solve the problem after learning that other researchers were already close to a solution, raising concerns about competitive misconduct. The incident has sparked allegations of scooping and spying within academic circles. The episode highlights both the rapid pace at which AI is reshaping mathematics and the ethical tensions that can arise in high-stakes research competition.

Apple iPhone Duo Forces Swift Developers to Rethink Layout Assumptions

Apple has unveiled the iPhone Duo, its first foldable iPhone, featuring a 5.4-inch outer display and a 7.6-inch inner display, shipping with iOS 27. The dual-screen, shape-shifting design invalidates long-standing assumptions in iPhone app development, such as fixed screen sizes, symmetric safe areas, and predictable orientations. Developers who rebuild their apps using Xcode 27.1 and the iOS 27.1 SDK will gain full edge-to-edge inner display support, while apps built on older SDKs will appear letterboxed. Apple now recommends using size classes instead of orientation-based layout logic, since the inner display behaves like an iPad in both dimensions. Additionally, UIScreen.main is being deprecated in favor of trait collection and window scene APIs, as the device now has more than one physical screen.

San Francisco City Attorney Orders Meta to Explain AI Child Abuse Ads

San Francisco's City Attorney's Office has issued a formal demand to Meta over harmful AI-generated child abuse advertisements that repeatedly appeared on Facebook and Instagram. Authorities are seeking an explanation from the company about how such ads were allowed to run multiple times on its platforms. Meta has pushed back, arguing that the matter falls outside the city's legal jurisdiction. The dispute highlights growing concerns over the adequacy of Meta's content moderation systems in detecting and removing exploitative material.

Schedule E Guide: Key Tax Expense Categories Every Landlord Should Track

Schedule E on Form 1040 is where landlords report rental income and expenses to the IRS each year, but many small landlords miss out on deductions due to poor record-keeping. Deductible categories include advertising, auto mileage, repairs, insurance, mortgage interest, property taxes, and depreciation, among others. A critical distinction exists between repairs, which are deducted in the year paid, and improvements, which must be depreciated over several years — misclassifying them is a common audit trigger. Depreciation is especially valuable, as a residential rental property depreciates over 27.5 years, potentially yielding thousands in annual deductions without any cash outlay. Experts recommend logging each transaction with a date, category, and property tag as it occurs, and keeping separate records for each rental property to ensure accurate year-end reporting.

nginx blocks new HTTP QUERY method while Caddy and Traefik pass it through

RFC 10008, which reached Proposed Standard in June 2025, introduces QUERY as a new HTTP method that is safe and idempotent like GET but can carry a request body like POST. A developer tested how major reverse proxies and frameworks handle QUERY requests by setting up a DigitalOcean droplet with FastAPI, Django, nginx 1.24.0, Caddy 2.11.4, and Traefik 3.7.10. Testing revealed that nginx silently rejects QUERY requests rather than forwarding them to the backend, while Caddy and Traefik passed the method through without issue. On the framework side, FastAPI handled QUERY correctly when explicitly configured, but Django's class-based views returned a 405 Method Not Allowed response despite following the same lowercase-dispatch pattern used for GET and POST. The findings highlight that adopting QUERY in production requires verifying compatibility at every layer of the stack, as the RFC itself does not specify how non-compliant intermediaries will behave.

Developer Documents Sysmon and Wazuh SIEM Detection Setup, Learns From Troubleshooting

A cybersecurity learner set out to explore what Microsoft's Sysmon tool can capture by tuning its configuration on a Windows endpoint and forwarding logs to the Wazuh SIEM platform. The project involved modifying an existing Sysmon XML configuration file on a Windows server by removing an exclusion for the conhost.exe process to increase process telemetry. After applying the change, the expected conhost.exe Process Create events (Event ID 1) did not appear as anticipated, prompting deeper investigation into how Sysmon records process creation. The experience highlighted that effective SIEM detection requires not just log collection but also a clear understanding of what to look for and how to validate test results accurately. The author noted that troubleshooting self-made errors proved to be a valuable learning experience in understanding the investigative side of cybersecurity.

NSE cuts IPO size, may raise 23.5k crore

How a Reckless 1958 Mass Card Drop in Fresno Seeded the Visa Network

In September 1958, Bank of America mailed 60,000 unsolicited, pre-activated credit cards to residents of Fresno, California, in a bid to force-start a payment network — an experiment that quickly spiraled into widespread fraud and over 20% delinquency, earning the internal nickname 'the Fresno Drop.' The stunt exposed a fundamental challenge of two-sided networks: cardholders won't adopt a card merchants won't accept, and merchants won't invest in infrastructure for a card customers don't carry. Diners Club had tackled a similar problem in 1950, when Frank McNamara personally persuaded New York restaurants and wealthy diners to join simultaneously, proving that payment intermediation between strangers could be a viable business. By the late 1960s, Bank of America's licensed BankAmericard network had expanded nationally but descended into chaos, with inconsistent fraud controls and chargeback rules threatening its survival. Bank manager Dee Hock resolved the crisis by designing a member-owned cooperative with universal, non-negotiable rules — a structure that became Visa in 1976.

Presibo Builds AI-Powered Continuous Care Loop to Bridge Gaps Between Hospital Visits

Presibo, a healthcare technology startup that began as a prescription management app during COVID-19, is developing an infrastructure designed to provide continuous patient monitoring rather than relying solely on periodic hospital appointments. The platform connects patients, smart medical devices such as blood pressure monitors and glucometers, an AI analysis layer, and healthcare professionals into what the company calls the Presibo Care Loop. Connected devices transmit readings directly into a patient's digital health record, allowing the system to track health trends over time instead of relying on isolated snapshots. An AI layer analyses this data to detect concerning patterns and routes alerts through an intelligent triage system, escalating cases to nurses, doctors, or emergency pathways based on severity. The company emphasises that the AI is intended to support healthcare professionals rather than replace them, keeping clinicians central to all care decisions.

Self-Hosting AI Models Rarely Beats Hosted Open-Weight APIs on Cost

When choosing between closed frontier APIs and self-hosted open-weight models, engineers often overlook a third option: hosted open-weight APIs that serve the same models without operational overhead. Closed frontier APIs cost roughly $2.50–$15 per million tokens, while hosted open-weight endpoints for models like Llama 4 run as low as $0.07–$0.90 per million tokens, and self-hosting on an H100 costs around $0.18 per million tokens — but only at 85% GPU utilization. In practice, production Kubernetes clusters average just 5% GPU utilization, which can inflate self-hosting costs up to 17 times compared to theoretical estimates. Additional operational work — version upgrades, monitoring, and capacity planning — adds $1,500–$4,000 per month in hidden costs not reflected in GPU bills. As a result, self-hosting only breaks even against hosted open-weight APIs at volumes exceeding 50 million tokens per day, a threshold most workloads never reach.

ChatGPT Surpasses 900 Million Weekly Users as OpenAI Closes $110B Investment Round

OpenAI announced in late February 2026 that ChatGPT has surpassed 900 million weekly active users, making it one of the most widely used AI products globally. The company also reported over 50 million consumer subscribers, more than 9 million paying business users, and 1.6 million weekly users of its coding tool Codex. Alongside the user metrics, OpenAI disclosed a $110 billion investment round backed by partners including Amazon, NVIDIA, and SoftBank to expand computing infrastructure and meet growing demand. OpenAI described ChatGPT as the primary entry point through which people first engage with AI, signaling its shift from a niche tool to a mainstream product. The figures suggest conversational AI has reached a scale where many employees, customers, and business stakeholders already have direct hands-on experience with it.