Developer details how to sync BLE firmware between a smartwatch and React Native app

A developer building a React Native app for a custom smartwatch has shared the technical approach used to establish and maintain a Bluetooth Low Energy connection. The setup relies on react-native-ble-manager and a custom hook called useBleManager to handle scanning, pairing, and communication with the watch's UART-style BLE service. A structured handshake packet, built using a custom buildPayload function with checksum validation, must be sent to the firmware immediately after notifications are enabled to signal that the phone is ready. Deliberate delays are built into the connection sequence because BLE requires brief pauses after certain operations to function reliably. The app also handles unexpected disconnections automatically by detecting drops through a listener and triggering a retry connection flow.

MEA rejects Pakistan claim of India’s hand in Karachi attack

Developer Details How He Fixed Five Hallucination Bugs in an AI Persona Chatbot

A developer building an AI persona named Jane — designed to respond in character rather than as a generic assistant — encountered repeated hallucination issues after initial testing appeared successful. The system used two parallel knowledge sources, project content and persona memories, retrieved before every reply to ground responses in real articles. The first major bug revealed that a broken retrieval index prevented the model from accessing saved content entirely, returning zero chunks per query. Subsequent bugs showed the model ignoring retrieved context due to conflicting prompt instructions, and blending real facts with invented details. Each issue was resolved through targeted fixes, including forcing index updates on every content save and restructuring the system prompt to explicitly tell the model it had already read the retrieved material.

IONA OS Quick-Start Guide Covers Rust, Flux, GUI, and AI Syscalls for Native Apps

IONA OS is described as a complete platform for building native applications, supporting two programming languages: Rust for performance-critical tasks and Flux for AI, causal memory, and timeline features. Both languages interface with the kernel through a unified syscall API, allowing developers to access system metrics, AI queries, and memory management functions. The OS also includes a native GUI compositor called Glass, which supports 3D acceleration via VirGL and Vulkan. Additional features highlighted include WebAssembly sandboxing, background system services, and native blockchain integration through the IONA Protocol. The project, available at iona.zone, is reportedly built by a single developer over 13 years of independent research.

Power BI Workflow: Data Cleaning, Modeling, and Dashboard Building Explained

Power BI enables analysts to transform messy raw data into interactive dashboards through a structured three-stage workflow. The process begins in Power Query, where missing values, duplicates, and inaccuracies are addressed using techniques such as replacing nulls with placeholders or removing rows with excessive missing data. Next, data modeling organizes tables into logical structures using fact and dimension tables, with relationships defined through primary and foreign keys to enable cross-table analysis. Design patterns like the Star Schema — where a central fact table connects to multiple dimension tables — are recommended for their simplicity and query performance. The final stage involves building dashboards that visually communicate insights drawn from the cleaned and modeled data.

Engineers Push Open5GS 5G Core to 9 Gbps Using VPP and DPDK on Commodity Hardware

A software engineering team replaced the socket-based User Plane Function in an Open5GS 5G core with a pipeline built on VPP and DPDK, achieving 8.5–9 Gbps throughput on a standard 10G link. The original implementation peaked at around 850 Mbps because every packet had to pass through the Linux kernel, incurring memory copies, syscalls, and context switches at scale. By adopting DPDK's poll-mode drivers for kernel bypass and VPP's graph-node architecture for batch packet processing, the team eliminated those bottlenecks entirely. The new UPF integrates with Open5GS's Session Management Function via the PFCP control-plane protocol, allowing session rules to be applied at near line rate on commodity x86 hardware. Once software ceased to be the limiting factor, the team found the next constraint shifted to the PCIe bus rather than the NIC or processing logic.

Maia Bouchier powers Hampshire to comfortable Charlotte Edwards Cup win over Durham

Maia Bouchier continued her rich vein of scoring form to guide Hampshire to a convincing victory over Durham in the Charlotte Edwards Cup. Durham struggled to post a competitive total, finding it difficult to score freely on a worn pitch. Bouchier, who opens the batting for England, then dismantled the chase with another impressive innings. Hampshire ultimately cruised to their target with minimal difficulty, extending Bouchier's outstanding run of form in the competition.

Power BI Data Modeling Guide: Star Schemas, Relationships, and Performance Tips

A technical guide published on DEV Community outlines best practices for data modeling in Microsoft Power BI, focusing on building efficient semantic models. The guide recommends the star schema design, which places a central fact table surrounded by dimension tables, as the optimal structure for query performance and simpler DAX calculations. It explains key concepts including table types, relationship cardinality, and cross-filter direction, while highlighting common pitfalls such as ambiguous relationships and performance bottlenecks. The resource also covers data combination techniques across three stages: Power Query for preparation, model-view relationships for logical linking, and DAX functions for dynamic analysis. The guide targets both beginners and advanced users aiming to build scalable, high-performance Power BI reports from raw data.

Knott's All-Round Performance Fires Blaze to Nine-Wicket Win Over Essex

Amy Knott delivered a standout all-round display as Blaze secured a commanding nine-wicket victory over Essex. The win was driven by Knott's contributions with both bat and ball, proving decisive in the one-sided contest. The result keeps Blaze firmly in contention for a place in the knockout stages of the competition. Blaze remain among the pace-setters in the standings following this emphatic performance.

Mandatory AI workflows, not AI itself, are draining developer job satisfaction

A viral post titled 'Don't feel like a developer anymore after AI' has sparked widespread discussion across developer communities, drawing thousands of responses. Developers expressing burnout are largely not opposed to AI tools themselves, but to managers who mandate AI-first workflows without consulting their teams about actual needs. Research on developer productivity consistently identifies autonomy over tools and processes as the strongest predictor of job satisfaction. When organizations impose AI usage quotas or treat tool adoption as a KPI, developers report feeling reduced to monitoring and correcting AI output rather than engaging in meaningful work. Experts and practitioners argue that giving developers the freedom to choose when and how to use AI — rather than mandating it — is the key to preserving both productivity and job fulfillment.

AWS Provisions Postgres Twice as Fast as GCP, Year-Long Benchmark Finds

A developer ran 1,852 automated tests over more than a year to benchmark managed PostgreSQL provisioning times across AWS, Azure, and GCP in nine regions. AWS consistently provisioned instances at a median of around 5 minutes, while GCP took roughly 10 minutes across all three tested regions. AWS also achieved a 100% success rate in all its regions, whereas Azure recorded failure rates of approximately 4%, or about 1 in 25 attempts. Azure showed the widest variance in provisioning times, with its eastus2 region ranging from 331 seconds at the median to 451 seconds at the 95th percentile. The findings highlight that for pipelines relying on ephemeral databases, such as CI/CD environments, GCP's slower spin-up times and Azure's reliability gaps carry practical operational costs.

Opinion: US Tech Policy Shifts From Adoption to Restriction

A PCMag opinion piece argues that the United States has moved away from its historical approach of embracing and demanding cutting-edge technology. The author contrasts past US leadership in adopting advanced tech with a growing trend of banning or restricting certain technologies. The piece appears to reference recent policy decisions targeting foreign-developed platforms and tools. The article has gained modest traction on Hacker News, prompting discussion about the implications of such restrictions on American innovation and competitiveness.

Study Explores Whether Large Language Models Can Pass the Mirror Self-Awareness Test

A recent blog post by Pascal Schuster investigates whether large language models (LLMs) can pass the mirror test, a classic measure of self-awareness used in animal cognition research. The mirror test traditionally determines if a creature can recognize its own reflection, serving as a proxy for self-awareness. The article applies this concept to AI language models to probe whether they exhibit any form of self-recognition or awareness. The post has drawn early attention on Hacker News, sparking discussion about the nature of machine cognition. The question touches on broader debates in AI research regarding consciousness and self-modeling in neural language systems.

Ford rehires veteran engineers after AI fails to meet quality standards

Ford has rehired experienced senior engineers, internally referred to as 'gray beards', after the company found that artificial intelligence alone could not ensure high-quality vehicle production. The automaker had previously reduced its reliance on seasoned human expertise, expecting AI tools to fill the gap. However, Ford acknowledged the assumption was a mistake, as AI fell short of delivering the expected product quality. The company's reversal highlights the continued importance of human experience and judgment in complex manufacturing processes.

Big Four rethink partnership as AI changes the game

Software Engineer Shares How GCP ACE Certification Reshaped His Entire Study Approach

A software engineer at a fintech company passed the Google Cloud Certified Associate Cloud Engineer (ACE) exam in April 2026 after overhauling his preparation strategy. He initially pursued the certification to fill a gap in his technical knowledge, having already completed certifications in cybersecurity and Azure AI fundamentals. His manager recommended Google Cloud certifications after he expressed interest in cloud technologies, as the organization was heavily invested in GCP. He found that his early study habits created a false sense of progress without genuine understanding, prompting him to rebuild his approach from scratch. Rather than offering a standard exam guide, he documented the mistakes and mindset shifts that ultimately led to deeper comprehension and success.

Developer Builds Custom REST API to Organize Twitter Bookmarks Without Paywall

A developer created a backend REST API to solve Twitter's lack of free bookmark organization, since the platform's folder feature is locked behind a subscription. The API supports three core functions: storing a bookmark, tagging it, and filtering by tag, with no frontend or AI components. Security and reliability were prioritized through database-level constraints, a centralized error handler, and a deliberate middleware chain ordering rate limiting before authentication and validation. The project uses Knex for schema migrations and pg.Pool for runtime queries, keeping the two tools intentionally separate to avoid subtle bugs. A hours-long debugging session ultimately traced connection errors to a missing dotenv.config() call, highlighting how environment misconfigurations can mimic database failures.

How Major Hosting Platforms Handle Next.js ISR and PPR in 2026

A technical analysis examines how leading hosting platforms support two advanced Next.js rendering features — Incremental Static Regeneration (ISR) and Partial Prerendering (PPR) — beyond surface-level marketing claims. The key distinction drawn is between functional fidelity, where a feature works correctly, and performance fidelity, where it works optimally, as platforms can satisfy the former while falling short on the latter. Traditional CDN deployment models were not built for the mutable, post-deploy cache behavior that ISR and PPR require, creating long-standing challenges for non-Vercel hosts. To address this, Next.js and major platforms including Netlify, Cloudflare, AWS Amplify, and Google Cloud collaborated on a standardized Deployment Adapter API, which reached stable release in Next.js 16.2 in March 2026. As of that release, Vercel remains the only platform to handle PPR's static shell and dynamic stream stitching at the CDN edge, while all other platforms currently resolve it through server functions.

1968 Stanford Study on Computer-Aided Language Development in Nonspeaking Children Resurfaces

A 1968 Stanford University technical report on computer-assisted language development in nonspeaking children has been shared on Hacker News. The document, catalogued as Stanford Computer Science Technical Report CS-TR-68-85, dates back to early research into technology-assisted communication. The report represents a historically significant exploration of how computers might support language acquisition in children unable to speak. However, the full content of the paper is accessible only via the Stanford technical report archive.

How Akira Yoshizawa's 1955 Exhibition Shaped Modern Origami

Akira Yoshizawa, widely regarded as the father of modern origami, held a significant exhibition in 1955 that helped elevate the art form to international recognition. The British Origami Society has documented the historical importance of this event on its website. Yoshizawa's work during this period was instrumental in transforming origami from a traditional craft into a respected artistic discipline. His innovative folding techniques and expressive figures set new standards that continue to influence origami practitioners worldwide.