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ProgrammingDEV Community ·

Go Tutorial Series Launches with In-Process Concurrency and CSP Pipeline Basics

A new hands-on tutorial series titled 'Go Distributed Systems Lab' has launched on DEV Community, targeting developers building distributed systems using Go 1.22 and its standard library. The first module focuses on foundational concurrency concepts — goroutines, channels, and Communicating Sequential Processes (CSP) — before progressing to advanced topics like gossip protocols and Raft consensus across 20 planned projects. The guide contrasts Go's channel-based communication model with traditional mutex-heavy approaches used in languages like C++ and Java, highlighting how Go eliminates data races by design. A working three-stage data pipeline — comprising a producer, a worker, and a collector — is constructed using only standard library packages including sync, context, and log/slog. The implementation demonstrates how each pipeline stage operates on isolated memory, passing ownership through typed, direction-constrained buffered channels rather than shared state.

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ProgrammingDEV Community ·

Tim King, Creator of Tripos OS That Powered the Amiga, Dies at 78

Tim King, a British computer scientist who built the operating system at the heart of the Commodore Amiga, passed away in 2026 at the age of 78. As a Cambridge PhD student in the late 1970s, King developed Tripos, a preemptive multitasking OS written in BCPL, which became the foundation of AmigaDOS when Commodore adopted it for the Amiga's 1985 launch. The Amiga's ability to multitask years before Windows or Mac OS was largely due to the maturity of King's earlier work. After his time at MetaComCo in Bristol, King founded Perihelion in 1986 to work on parallel computing and the Helios OS, and later established UK Online, one of Britain's earliest internet service providers. His career spanned three defining decades of computing, leaving a lasting mark on operating systems, personal computing, and early consumer internet.

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ProgrammingDEV Community ·

AI Tools Are Reshaping How Engineers Plan, Build, and Review Code

Traditional software development required engineers to pre-plan and split work into small pull requests before writing any code, primarily to keep code reviews manageable. AI assistants have dramatically reduced the cost of building, designing, and decomposing large branches of code into smaller PRs after the fact. This shift allows developers to build a complete feature first, demo it early, and only then split the work into reviewable chunks along boundaries the code itself reveals. However, two things remain expensive: the judgment-intensive half of code review and product validation, which still require human understanding and real-world testing. The proposed new workflow emphasizes rigorous upfront planning and spec-writing, but defers structural decomposition until after the feature is built and validated.

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ProgrammingDEV Community ·

Developer Builds Visa Photo Checker After Finding Passport Requirements Surprisingly Complex

A developer created VisaReadyNow, a web tool that validates visa and passport photos against official country-specific requirements. The project was prompted by the realization that photo specifications — including size, background, and head position — vary significantly between countries and are often scattered across government websites. The harder challenge was not building the image-processing logic but accurately researching and compiling official requirements for each country. The tool is designed to go beyond simple photo generation by explaining why a photo passes or fails, with links to source documents. The project remains a work in progress, with the developer continuing to improve transparency and accuracy of the requirement data.

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ProgrammingDEV Community ·

TypeScript Intersection Types Can Silently Break Code When Properties Conflict

TypeScript intersection types follow set-theoretic rules, meaning A & B requires values that satisfy both types simultaneously — not a simple merge of their properties. When two intersected types share a property with incompatible types, TypeScript resolves that property to 'never', which can silently break type safety without raising an immediate compiler error. This subtle behavior causes production failures when developers assume intersection behaves like object spread, leading to types that accept no valid runtime value. Compatible types with non-overlapping or matching property signatures compose cleanly, while conflicting signatures collapse the intersection entirely. Understanding this distinction helps developers choose between intersection types for combining capabilities and union types for representing one-of-several-shapes scenarios.

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ProgrammingDEV Community ·

Developer Cuts Website Latency by Measuring Bottlenecks Before Optimizing

A developer improved website performance by systematically measuring request timings rather than applying generic optimization tricks. Key metrics analyzed included DNS lookup, TCP connection, TLS handshake, time to first byte, and total response time. One notable finding was that a site can appear fast locally but perform significantly worse for users in distant locations, prompting multi-region testing. The developer reduced unnecessary server-side work and found that small gains across multiple layers combined into a meaningful overall improvement. The core takeaway was that effective performance optimization depends on identifying the real bottleneck first, not guessing at solutions.

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ProgrammingDEV Community ·

Developer builds Malaysian multicultural RPG entirely within a single HTML file

A developer created Budak Kampung, a browser-based top-down RPG set in a 1440×1440 pixel world divided into Malay, Chinese, and Indian cultural zones, all contained within one self-contained HTML file. The project required no game engine, no npm packages, or build steps, making it fully portable across any browser or device. The game features enterable buildings, NPC dialogue, a localStorage save system, and mobile-first controls. Building without standard tooling surfaced technical challenges, including a HiDPI rendering bug where ignoring devicePixelRatio caused blurry visuals and misaligned tap interactions on Retina and mobile screens. The developer documented each design decision and bug fix in a detailed devlog, citing Malaysia's multicultural heritage as the inspiration for choosing the setting over a generic fantasy world.

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ProgrammingDEV Community ·

70% of AI Agent Pilots Fail: What Enterprises Must Do to Reach Production in 2026

IDC forecasts that by 2026, 60% of enterprises will have deployed at least one production AI agent to automate functions such as customer support, DevOps, and R&D workflows. However, Gartner's 2025 data reveals that 70% of AI agent projects stall at the pilot stage due to weak evaluation practices, unreliable behavior in production, and poor alignment with business goals. Modern production-ready AI agents are described as multi-modal, stateful, tool-using systems capable of autonomously executing complex workflows over extended periods. Regulatory frameworks such as the EU AI Act and US AI Executive Order impose additional compliance requirements for high-risk deployments in sectors like finance, healthcare, and critical infrastructure. A technical guide published on DEV Community outlines an end-to-end playbook covering agent architecture, evaluation frameworks, production hardening, and strategies for converting agent capabilities into lasting competitive advantage.

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ProgrammingDEV Community ·

Key Lessons From Deploying Passkeys in Production With WebAuthn

Passkeys are WebAuthn public-key credentials that replace both passwords and second factors in a single authentication prompt, with the private key never leaving the user's device. One of the most critical implementation details is the Relying Party ID (RP ID), which must be set to the apex domain before any user registers, as it cannot be changed retroactively and determines where credentials are usable. The user.id field must be an opaque, non-identifying handle rather than an email address, since it gets permanently baked into the credential and cannot be rotated later. Conditional UI — which surfaces passkeys inside the browser's autofill dropdown — requires both the autocomplete='username webauthn' attribute on the input field and a separate navigator.credentials.get() call with mediation set to 'conditional'. Developers are also cautioned that passkeys shift rather than eliminate the account-recovery problem, making it important to retain password support during the transition period.

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ProgrammingDEV Community ·

Browser Agents Need Strict Session Boundaries to Prevent Automation Security Failures

Browser automation creates persistent sessions that retain cookies, storage, tabs, and incomplete actions even after an AI agent loses context, posing risks that API-only systems typically avoid. Security-focused developers recommend treating every browser session as an isolated, expiring execution unit with a defined contract specifying its owner, purpose, permitted sites, and deadline. Each browser worker should use a disposable profile per workflow rather than a shared or human-linked Chrome profile, which may carry unrelated credentials and extensions. If a worker crashes mid-action, the replacement should mark the step as unknown and verify via a read-only check before retrying, since a click or timeout alone cannot confirm whether a server-side effect occurred. Revocation and authorization logic should be enforced at the browser worker or policy layer, not left to the agent to interpret through instructions or page content.

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ProgrammingDEV Community ·

Amazon Nova Lite on Bedrock Powers Text and Icon Extraction for AWS Builder Cards

A developer built a multi-lambda pipeline to process AWS Builder Cards, using Amazon Nova 2 Lite via Amazon Bedrock to extract both text and gameplay icons from card images. Unlike earlier pipeline components, this model runs entirely within Bedrock rather than inside a Lambda function, eliminating concerns about container builds, memory limits, or cold starts. Standard AWS tools like Textract and Rekognition were ruled out because they could not interpret the card's icon-based effects, making a multimodal model necessary. The model is invoked through a simple HTTPS converse() API call, with temperature set to 0.0 to ensure consistent, deterministic outputs. Extracted card data, including text fields and icon types, is then written to DynamoDB as card metadata.

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ProgrammingHacker News ·

US Efforts to Restore Democratic Rule in Venezuela Show Renewed Promise

A recent analysis suggests the United States may have a genuine opportunity to help restore democracy in Venezuela. The piece, published by The Economist in August 2026, examines the evolving geopolitical and diplomatic conditions surrounding the country. Venezuela has been under authoritarian rule for years, with its democratic institutions significantly weakened under the Maduro government. The report indicates that shifting circumstances may now make meaningful US-backed democratic restoration more feasible than before.

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ProgrammingDEV Community ·

73% of Tracked Software Versions Are End-of-Life, But the Real Risk Lies Elsewhere

A analysis of end-of-life.org's database of 8,307 software and hardware versions finds that 73% have passed their end-of-life date, but experts caution this figure is largely misleading. The statistic is inflated by historical versions no longer in active use, making it a denominator problem rather than a meaningful risk indicator. What actually matters is the intersection of end-of-life software and versions still actively deployed in an organisation's environment, data that no public dataset can provide. Teams are also warned against sorting upgrade priorities by total CVE count, as older versions naturally accumulate more vulnerabilities, skewing focus away from higher-severity risks. A more actionable approach involves ranking dead-and-deployed software by critical CVEs per year and flagging the 142 branches set to reach end-of-life within 90 days, when upgrades are still routine maintenance rather than emergency remediation.

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ProgrammingDEV Community ·

Local-first API testing workflow stores collections as versioned JSON files

A developer and creator of API testing tool RestRuno has outlined a cloud-free workflow for testing APIs, where request collections are stored as plain JSON files and version-controlled with Git. The approach eliminates the need for cloud accounts or synced workspaces, which can pose compliance concerns for some teams. Each request is saved as a small JSON file, with environments and variables also managed locally, while JavaScript handles authentication chaining and assertions. Data-driven testing is supported by feeding CSV or JSON files into a runner that maps columns to variables. The author notes that similar tools like Bruno follow the same local-first philosophy, and argues that API test suites belong in the same repository as the code they test.

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ProgrammingDEV Community ·

How JavaScript's Event Loop Keeps Web Apps Responsive on a Single Thread

JavaScript runs on a single execution thread yet handles multiple tasks simultaneously through a mechanism called the event loop. The event loop delegates slow or time-consuming operations — such as network requests or file uploads — to background browser APIs, freeing the main thread to continue processing other tasks. Once a background task completes, its callback function is placed in a queue and executed only when the main thread is idle. This design prevents web applications from freezing during intensive operations, ensuring users can still click, scroll, and type while data loads. Developers write non-blocking code by relying on this cycle, making the event loop a foundational concept in modern web development.

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ProgrammingDEV Community ·

Developer builds 59 privacy-first browser tools in vanilla JS with zero dependencies

A developer has publicly launched Antigravity Tools, a collection of 59 free, browser-based utilities built entirely in vanilla JavaScript without any external dependencies, backend servers, or analytics. The project was motivated by privacy concerns with existing online tools, such as JWT decoders and regex testers, which can log or transmit user data to remote servers. All operations run locally in the browser using native APIs including Web Crypto, Canvas, Web Audio, and IndexedDB. The toolkit covers a wide range of developer needs, including JWT inspection, RSA key generation, JSON formatting, cURL conversion, regex testing, and AI prompt optimization. The tools are freely accessible at antigravitytools.app and require no installation, accounts, or cookies.

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ProgrammingDEV Community ·

Developer shares JavaScript lessons from building a simple counter app with Cloudflare

A developer built a small counter app using vanilla JavaScript, Tailwind CSS, and Cloudflare Workers to practice state encapsulation, DOM event handling, and static app deployment. The project evolved from a constructor function to a class-based approach using JavaScript's private field syntax (#count) to protect state from direct external access. Instead of attaching separate click listeners to each button, the developer used event delegation — a single listener on the parent element — to simplify and future-proof the code. Deployment to Cloudflare Workers initially failed repeatedly because the Wrangler config pointed to the project root, causing node_modules files exceeding 25 MiB to be treated as deployable assets. The fix was straightforward: redirecting the assets directory to the actual build output folder resolved the error and completed the deployment.

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ProgrammingDEV Community ·

AI Boom Mirrors Past Tech Bubbles: Correction Likely, But Technology May Endure

Historical tech bubbles — from 1840s railway mania to the dot-com crash — follow a recurring pattern where capital floods in ahead of real returns, prices detach from fundamentals, and a correction eventually follows. The current AI wave shows similar traits, with a handful of major companies like Nvidia, Microsoft, and Google driving outsized market gains on the promise of generative AI, while secondary startups trade at high valuation multiples. Analysts note bubble-like signals including concentrated market leadership, heavy upfront infrastructure spending, and investor optimism outpacing proven, scaled profits. A meaningful market correction is considered probable, with risks including disappointing near-term returns, overcapacity in data centers, and failure of many smaller AI ventures. However, as with past technology cycles, the underlying AI technology is already delivering real productivity gains and is widely expected to generate significant long-term economic value even if many early speculative investments do not pay off.

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ProgrammingDEV Community ·

One Line of CSS Enables Smooth Page Transitions Without JavaScript

A native CSS feature called the View Transition API now allows multi-page websites to cross-fade between pages instead of showing a jarring white flash on navigation. Supported since Chrome 126, Edge 126, Safari 18.2, and Opera 112, the effect is activated by adding a single CSS rule — @view-transition { navigation: auto; } — to a shared stylesheet. The API works by capturing a screenshot of the outgoing page, rendering the new one, and blending the two together using GPU-accelerated animation. Developers can also apply the same API to in-page interactions like toggling panels or filtering lists using the JavaScript startViewTransition method. The feature is progressively enhanced, meaning unsupported browsers simply fall back to standard navigation without errors or broken animations.

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ProgrammingDEV Community ·

Why context quality, not model smarts, determines AI output in real builds

A developer building an AI-native platform argues that output quality depends primarily on how much relevant context a model can access at the time it generates a response, not on prompt tricks or model upgrades. To demonstrate this, they contrast two identical coding prompts — one without context and one with the actual codebase visible — showing the latter produces directly usable code while the former produces generic, misaligned output. The team also reduced their MCP server's tool count from 59 to 43, finding that fewer, well-scoped tools improved model performance because each tool schema consumes valuable context window space. Benchmarking the same build tasks before and after the reduction consistently favored the leaner setup. The post concludes by flagging a persistent gap: for developers with existing websites, the richest context they own — their content, structure, and design system — remains invisible to their AI tools.

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