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ProgrammingDEV Community ·

How to Buy 2026 FIFA World Cup Tickets Safely and Avoid Bot-Driven Scams

The 2026 FIFA World Cup, hosted across 16 stadiums in the United States, Canada, and Mexico, is expected to draw around 3.2 million fans across 80 matches, with approximately 8 million tickets available. However, only 30% of tickets are released in the first public sale, making them a prime target for automated scalper bots, which are estimated to account for roughly 70% of secondary-market sales. Fans are advised to purchase exclusively through the official FIFA ticketing portal, use protected payment methods, and verify ticket barcodes via the FIFA mobile app. In the United States, using ticket-buying bots violates the BOTS Act of 2016, with penalties reaching up to $10,000 per ticket for individuals and $100,000 for commercial operators. Developers and tech-savvy fans can deploy lightweight Python monitoring scripts to receive real-time alerts when legitimate tickets become available at face value.

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ProgrammingDEV Community ·

FoxyInvoice Dev Blog: How Invoice Lifecycle, Tax Engine, and Exports Were Built

Developer blog series FoxyInvoice has published Chapter 5, detailing the domain logic behind its invoicing platform built for real production use. The invoice lifecycle follows a state machine moving from Draft through Sent to Paid, Partial, Overdue, or Void, with overdue status derived daily rather than stored. A dedicated tax engine handles US sales tax complexity by evaluating exemptions, nexus, jurisdiction rates, and product taxability per line item, using decimal arithmetic to avoid floating-point errors. All totals are computed server-side, with the browser's figures never trusted, and invoices lock after a configurable window to prevent retroactive edits. The platform also supports export formats including CSV, QuickBooks IIF, and Tally XML to meet accountant requirements across different markets.

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ProgrammingDEV Community ·

9,560 MikroTik Routers Expose SSH Globally Amid Two Actively Exploited Flaws

CERT Polska disclosed six MikroTik RouterOS vulnerabilities in September 2026, two of which — CVE-2026-67277 and CVE-2026-86060 — were already being actively exploited in combination to give unauthenticated attackers full administrative control. CISA added both flaws to its Known Exploited Vulnerabilities catalog on 10 September 2026. A ZoomEye scan identified over 8 million internet-visible RouterOS devices, of which 9,560 specifically expose SSH — the key precondition for the reported attack chain. Security researchers caution that these figures represent a floor, not a ceiling, since scanning coverage is incomplete and the fingerprint cannot distinguish patched from unpatched firmware. Organizations running RouterOS equipment are advised to audit internet-facing SSH exposure, verify firmware versions against patched releases, and review logs for signs of unauthorized access.

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ProgrammingDEV Community ·

How Performance Tuning and Profiling Help Developers Build Faster Software

Performance tuning is a systematic process of optimizing software components — including code, databases, and networks — to improve speed, responsiveness, and resource efficiency. Profiling complements this by diagnosing runtime behavior, helping developers pinpoint CPU-heavy functions, memory leaks, and excessive I/O operations. The tuning cycle involves measuring a baseline, identifying bottlenecks, applying fixes, and re-measuring to confirm gains. Popular profiling tools include Chrome DevTools, Visual Studio Profiler, YourKit, Intel VTune, and Python's cProfile, each catering to different platforms and languages. Experts recommend targeting the most resource-intensive components first and controlling the profiling environment to ensure accurate, actionable results.

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ProgrammingDEV Community ·

AI Trading Systems Move Beyond Binary Vetoes With Conditional Approval Logic

A new architectural approach in AI-driven trading systems replaces binary pass-or-veto decisions with a 'Conditional Approval' mechanism that adjusts risk parameters dynamically. In a logged example from September 2026, an AI Advisor issued a PROCEED ruling on a UAIUSDT trade despite unfavorable macro conditions, applying tightened stop-losses and reduced position size instead of a blanket veto. The system detected an 88-score high-kinetic micro-structure signal indicating strong localized buying momentum, while simultaneously flagging elevated Bitcoin Dominance at 58.3% and broad market sell pressure as macro risks. Traditional binary logic would have forced a deadlock, either missing a profitable opportunity or exposing the portfolio to significant downside. The shift toward continuous risk space management allows AI trading systems to act as holistic risk managers rather than simple signal-to-order pipelines.

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ProgrammingDEV Community ·

Five Coding Habits That Sharpen Problem-Solving Skills in the AI Era

A developer writing in 2026 argues that while AI tools can generate code rapidly, they risk eroding a programmer's ability to think through problems independently. The author outlines five habits adopted to counter this: thoroughly analyzing a problem before writing any code, building up from brute-force solutions rather than jumping to optimized ones, and using AI as a mentor for hints and feedback rather than a solution generator. Manually tracing through algorithms with small examples — known as dry runs — is highlighted as a powerful way to catch logic errors without a compiler. The author also emphasizes the value of being able to explain any solution clearly in plain language as a reliable test of genuine understanding.

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ProgrammingDEV Community ·

CoordMap Aims to Unify Fragmented Geographic Tools Around a Single Coordinate

A developer identified a common workflow problem where users must visit multiple separate tools to answer questions about a single set of coordinates, such as elevation, time zone, local time, and distance. This fragmentation prompted the creation of CoordMap, a geographic utility platform designed to consolidate related location-based tasks. Rather than building another full-featured map dashboard, the project focuses on keeping individual tools simple and task-specific while making it easy to continue to the next related query. The core design principle is that a coordinate is not the final answer but the starting point for richer, human-meaningful questions. Each tool within CoordMap is built around a single clear purpose, with the map serving the task rather than becoming the task itself.

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ProgrammingDEV Community ·

Why Database Transactions Must Wrap Entire Operations, Not Individual Queries

A software engineering lab demonstrates how omitting database transactions can leave systems in a partially completed, inconsistent state after a failure. In the example, a payment flow inserts a payment record and marks an order as paid before crashing, but never records the wallet transaction — resulting in corrupted data rather than a clean rollback. The core lesson is that a database transaction acts as a boundary: all related writes inside it either commit or roll back together, while statements executed outside any transaction cannot be automatically undone. A safer implementation wraps all three related writes — payment insert, order status update, and wallet transaction insert — inside a single transaction, ensuring the database reverts to its original state if any step fails. The lab also applies the same principle to an outbox pattern, where an invoice update and an outbox event insert are committed atomically to guarantee consistency between business state and event intent.

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ProgrammingDEV Community ·

Messenger Startup VEIL Labels Every Security Claim as Implemented, Experimental, or Unproven

VEIL, a zero-knowledge messaging app currently in open iOS beta, has adopted an unusual transparency policy by publicly labeling every security claim on its landing page as either Implemented, Experimental, or Not Claimed. Solo founder behind the app made the decision after recognizing that terms like 'end-to-end encrypted' have lost credibility due to widespread misuse by major platforms. Features such as burn-after-open messages and duress codes are marked Implemented, while certain designs are flagged as Experimental and not yet battle-tested. Notably, the company openly states it has not completed an independent security audit, and its own comparison table ranks Signal higher than VEIL at 9.17 versus 7.50. The founder argues this radical honesty is a strategic move to build trust with security researchers, privacy communities, and journalists who are inherently skeptical of marketing claims.

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ProgrammingDEV Community ·

Developer Builds AI-Assisted Contradiction Resolver Using Sanity App SDK

Software developer Shahbaz Ali created a contradiction-resolution tool called Contradiction Triage as part of the DEV × Sanity Challenge, addressing the common problem of conflicting information across company documents. The tool detects contradictions between documents written by different teams — such as legal, support, and marketing — and creates a structured case for each conflict. An AI agent proposes a ruling with a rationale and cited precedents, which a human judge then approves or overrides. Once a decision is made, it becomes the canonical answer served across the platform, complete with an audit trail and attribution. The system uses six document types built on Sanity's App SDK and stores all rulings as queryable documents to prevent repeated, unresolved debates.

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ProgrammingDEV Community ·

Fine-tuned 310M encoder beats Jev on topic classification but ties on polarity tasks

A developer ran three Japanese text classification tasks — long-document topic, short-text polarity, and financial-sentence polarity — across six systems using 250 labeled rows each. A 310M ModernBERT encoder fine-tuned on just 250 labels outperformed TypeSafe's Jev decision API by 12 percentage points on topic classification, while also being 4 to 20 times faster. However, on the two polarity tasks, the trained encoder and Jev were statistically tied, with neither system holding a clear overall advantage. Zero-shot open-source models, including a GLiNER-family classifier, consistently underperformed Jev across all three tasks. The key finding is that which system wins depends on task structure — zero-shot APIs like Jev are practical when no labeled data exists, while small trained encoders gain an edge once a few hundred labels are available.

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ProgrammingDEV Community ·

DeepSeek's Time-Based API Pricing Caught Developers Paying Double Overnight

DeepSeek's API charges peak rates during Beijing business hours (09:00–12:00 and 14:00–18:00 CST, Monday–Friday), with off-peak prices exactly half the peak cost. A developer discovered their 3 a.m. Eastern batch job was inadvertently running during Beijing's afternoon peak window, doubling API costs without any code error. The classic US overnight maintenance window of roughly 2–6 a.m. Eastern falls squarely within DeepSeek's peak billing period, while standard East Coast business hours are off-peak. The recommended fix is to write cron schedules in Asia/Shanghai timezone rather than converting to UTC, since US daylight saving shifts can silently break hand-converted times twice a year. Developers are also advised to account for long-running jobs that straddle peak boundaries and retry queues that may drain into expensive windows.

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ProgrammingDEV Community ·

Thousands of Industrial Control Devices Found Exposed on Public Internet

A ZoomEye scan conducted on September 20, 2026, detected over 10,500 records responding to industrial protocol fingerprints across three queries. Modbus accounted for the largest share with 9,820 records, followed by EtherNet/IP with 585 and Siemens S7 with 173, each showing distinct geographic distributions. These protocols were originally designed for isolated, air-gapped networks and lack native authentication or encryption in their base forms. Researchers cautioned that a reachable device does not automatically indicate a vulnerability or confirm it controls critical infrastructure, as test rigs and simulators can appear identical in such scans. The findings nonetheless highlight that internet exposure of legacy industrial protocols is a widespread, multi-regional concern requiring careful network architecture controls.

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ProgrammingDEV Community ·

Study: Claude Code hooks block protected file edits better than CLAUDE.md rules

Researchers ran 29 headless sessions using Claude Code v2.1.273 to compare two methods of preventing edits to a protected directory: a plain-language rule in CLAUDE.md and a PreToolUse shell hook. Both methods successfully blocked edits in normal conditions, but when users explicitly claimed authorization in the prompt, the CLAUDE.md rule was overridden in both test runs while the hook held firm in both. The CLAUDE.md approach added 58–70 input tokens to every request, whereas the hook incurred no token cost unless triggered, though it did introduce an extra model round trip on direct requests. Claude Code's own documentation notes that CLAUDE.md content is treated as context rather than enforced configuration, and that PreToolUse hooks are the correct mechanism for reliably blocking actions. The experiment provides concrete measurements backing that distinction, showing hooks are more tamper-resistant against user-supplied authorization claims.

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ProgrammingDEV Community ·

Key Docker Commands for Managing Containers, Images, and Volumes

This tutorial covers essential Docker commands used in day-to-day container management, including pulling images, running containers, and executing commands inside them. Lightweight base images such as Alpine and Bookworm are recommended for small applications to reduce overhead compared to full OS images. Commands like docker run -it, docker exec, and docker ps help users interact with and monitor running containers. Port mapping with the -p flag exposes container services to the host, while volume mounting with -v allows persistent or shared file storage. Additional commands such as docker logs, docker inspect, and the --rm flag for auto-removal round out core container lifecycle management.

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ProgrammingDEV Community ·

Developer's Second AWS AI Agent Accidentally Fulfilled His First Project's Wishlist

A software developer completing an AWS nanodegree shipped his second AI support agent, Nova Adiutrix, built on Amazon Bedrock to handle order tracking, refunds, and product queries for a simulated online store. During testing, the agent incorrectly refused to share order details with the account holder, citing a security check that falsely flagged the order as unlinked — making a bug look indistinguishable from correct security behavior in the logs. The developer later realized that Nova Adiutrix had organically implemented three features he had explicitly deferred in his first project, Nova Trivium, listed under a 'Not built, and why' section in that project's README. Key architectural differences between the two builds included a shift from pasting static FAQ content directly into a system prompt to using a Bedrock-managed vector knowledge base for retrieval. The developer noted that each project surfaced the same core challenges — where knowledge lives, where rules are enforced, and whether a security checkpoint can be fooled by the system it is meant to check — only at a greater level of complexity.

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ProgrammingDEV Community ·

Fliproom Uses Sanity CMS to Turn Room Changeovers Into Visual Checklists

Fliproom is a small open-source planning tool built for the Sanity CMS developer challenge that converts room layout changeovers into step-by-step visual checklists. A volunteer selects a starting and ending room layout, and the app automatically derives a numbered move list by comparing equipment placements across layouts rather than requiring manually authored instructions. The demo features a fictional 12-by-8-metre community hall with eight pieces of equipment and three layouts, hosted publicly on GitHub Pages with no login required. Dependencies between steps keep certain moves locked until prerequisite actions are completed, and progress is preserved across browser reloads. The MIT-licensed app is built with Next.js, TypeScript, React, and Sanity, with AI agents handling most of the technical development and code review.

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ProgrammingDEV Community ·

Developer Logs 445 Clones but 2 Stars for Free Mental Health Toolkit

A developer released a collection of 36 free, client-side mental health tools built in vanilla JavaScript, requiring no backend, signup, or dependencies. After 30 days, the project attracted 157 unique cloners and 445 total clones on GitHub, but earned only 2 stars and no forks. Alongside the repository, the developer published 62 articles on Dev.to, generating just 607 views and 24 reactions in total. Attempts to monetize through a Gumroad template, a paid API listing on RapidAPI, and an AI agent marketplace yielded zero sales or paid calls. The developer attributes the low conversion rate to a weak repository presentation and a monetization model undermined by the toolkit's completeness at no cost.

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ProgrammingDEV Community ·

How HLS, MPEG-TS and LL-HLS Power High-Performance 4K Live Streaming in 2026

As 4K HDR displays and gigabit internet become mainstream, IP-based video delivery has largely replaced traditional cable and satellite TV. Live streaming at scale — particularly for high-viewership events like sports or pay-per-view — poses distinct engineering challenges around latency, buffering, and network congestion that on-demand platforms do not face in real time. Two primary transport standards dominate live video distribution: HLS, developed by Apple, which breaks streams into small HTTP chunks with latency of 12–25 seconds, and MPEG-TS, which transmits continuous fixed-size packets with sub-2-second latency but is more vulnerable to packet loss. A newer variant, Low-Latency HLS (LL-HLS), bridges the gap by delivering partial chunks via HTTP/2 or HTTP/3, achieving latency of 2–5 seconds suitable for interactive broadcasts. Best practices for reliable 4K live streaming in 2026 include using wired or 5 GHz Wi-Fi connections, tuning client-side buffer settings, and selecting providers with redundant multi-gigabit edge CDN infrastructure.

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