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ProgrammingDEV Community ·

Python Classes Explained: How Blueprints, Self, and Methods Actually Work

A developer tutorial on DEV Community breaks down Python classes for beginners who struggle to understand why they are needed alongside variables and functions. Classes act as blueprints for creating objects, with each object holding its own data through instance attributes defined in the __init__() method. The special keyword 'self' refers to the current object, allowing methods to access and modify that object's specific data. Class attributes, by contrast, are shared across all instances rather than belonging to any single object. The article uses an employee management system as a practical example to show how grouping related data and behavior inside a class makes code cleaner and more organized.

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ProgrammingDEV Community ·

Jev AI Model Scores Options Instead of Generating Text, Cutting Decision Time 85x

Jev is a newly developed frontier AI model that takes an unconventional approach by scoring pre-supplied options rather than generating text responses. Instead of producing prose, it evaluates choices in a single parallel pass, reducing processing time from roughly 8.5 seconds to about 0.1 seconds. The model is designed to address the reality that most enterprise AI traffic involves routing, triage, classification, and gating rather than content generation. Its creators argue this makes Jev particularly suited for decision-making roles within agent pipelines, including model routing and tool-call guardrails. The trade-off is a narrower capability set, which the developers acknowledge openly alongside use cases where a decision-only model adds the most value.

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ProgrammingDEV Community ·

Open-Source Plugin Lets Large Language Models Control Blender via MCP

A developer named Rijul has highlighted an open-source plugin called mcp-for-blender, hosted on GitHub, that allows users to control the 3D software Blender using any large language model of their choice. The plugin works through the Model Context Protocol (MCP) and is compatible with AI clients such as Claude Desktop, Claude Code, and OpenCode. Once installed and connected, users can issue natural-language prompts to describe or modify their Blender scenes, with the AI executing the instructions directly inside the application. The plugin also integrates with Poly Haven, a free library of textures, HDRIs, and 3D models, enabling richer scene generation with realistic lighting and materials. The demonstration showed the tool successfully building a 3D room and a detailed low-poly floating island scene complete with textures and a rendered output.

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ProgrammingDEV Community ·

Flask creator's 35-hour GPT-6 Astra experiment cost $1,200 and produced nothing usable

Armin Ronacher, creator of Flask and Jinja, ran an unattended AI coding experiment by giving GPT-6 Astra a single prompt to build a Python variant with virtual threads and lexical scoping, then letting it run for 35 hours without human intervention. The agent generated 79 commits, exchanged roughly 1,400 messages between its own subagents, and consumed approximately 1 billion API tokens at a cost of around $1,200. Despite the activity, Ronacher concluded the output had 'absolutely nothing of value', working out to about $15.50 per commit — comparable to a human rate, but without any course-correcting questions. His analysis of the agent traces revealed problematic habits: editing files via Python string-splicing instead of proper tools, committing whitespace-stripped unit tests, and losing coherent task naming by the end. Ronacher's write-up, which reached the Hacker News front page with over 400 points, argues the model is rewarded for completing long tasks but barely penalised for producing low-quality code.

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ProgrammingDEV Community ·

Independent Benchmark Finds X25519MLKEM768 Adds ~3ms Latency Over Classical TLS at p99

A developer conducted an independent, reproducible benchmark comparing post-quantum hybrid key exchange X25519MLKEM768 against classical X25519 on two AWS Graviton3 EC2 spot instances, with the full test costing under one dollar. The experiment used nginx built against OpenSSL 3.5.0 as the target server and Gatling as the load generator, both running on c7g.large instances in the same AWS availability zone. An initial test at 1,000 requests per second proved unreliable due to client-side CPU saturation, which masked any meaningful difference between the two algorithms. Reducing throughput to 300 requests per second yielded cleaner results: median latency was nearly identical, while p99 latency for the PQ arm was roughly 3ms higher — a 60% relative increase — though one trial recorded an outlier of 39ms, possibly due to CPU steal or JVM garbage collection. The author notes this reflects real-world 2025–2026 PQ TLS deployments, where classical certificates are still used alongside hybrid KEMs, and plans a second phase to investigate the outlier and run more trials.

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ProgrammingHacker News ·

California Strengthens Consumer Data Deletion Rights Under Expanded CCPA Law

California has signed SB-923 into law, expanding consumers' right to delete personal data under the existing California Consumer Privacy Act (CCPA). The new legislation broadens the scope of deletion rights previously available to state residents. This update represents a significant step in California's ongoing efforts to strengthen digital privacy protections. The law places additional obligations on businesses that collect and process personal data belonging to California residents.

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ProgrammingDEV Community ·

How Git Worktrees Help Claude Code Run AI Agents in Parallel Without Conflicts

A developer exploring Claude Code's AI-assisted software engineering course identified a core challenge: multiple coding agents working simultaneously can collide when sharing a single Git checkout directory. Git worktrees solve this by giving each agent session its own isolated working directory and branch while still sharing the same repository history. Claude Code Desktop builds on this native Git feature by wrapping it in a visual interface that links each session to its task, branch, and pull request. However, worktrees alone do not resolve merge conflicts or cross-team contract coordination — they only eliminate a narrower class of collision caused by concurrent agents editing the same checkout. The author recommends small rollouts before scaling and notes that the real opportunity lies in connecting these workflows to each squad's existing processes and shared-change agreements.

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ProgrammingDEV Community ·

Developer Builds AI Security Tool That Learns From Past Investigations

A developer has created ThreatMemory, an AI-powered security alert triage assistant designed to retain and apply knowledge from previous investigations. Unlike standard large language models that analyze each alert in isolation, ThreatMemory uses a memory layer powered by a tool called Hindsight to retrieve historically relevant cases. When a new alert arrives, the system pulls similar past incidents and provides that organizational context to the AI before it renders an analysis. This allows the assistant to recognize patterns — such as recurring false alarms from a corporate VPN — rather than treating every alert as entirely new. The tool is built to use historical cases as context rather than automatically repeating old decisions, acknowledging that similar-looking alerts can still represent distinct threats.

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ProgrammingHacker News ·

PLC Organization Launches Independent Public Ledger of Credentials Initiative

The PLC Organization has announced its first steps toward establishing an Independent Public Ledger of Credentials. The initiative aims to create a transparent, publicly accessible system for recording and verifying credentials. Details about the project were shared via the organization's official blog. The announcement received limited initial engagement on Hacker News, garnering four points and no comments at the time of publication.

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ProgrammingDEV Community ·

Developer Shares Open Java Practice Problem Repository on GitHub

A developer has published a collection of Java practice problems they have solved, making the repository publicly available on GitHub under the name MyJavaExercises. The project is intended as a learning resource for others interested in Java programming. The author plans to continue adding new problems to the repository over time. Visitors are also encouraged to suggest more accurate or optimized solutions to existing problems.

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ProgrammingDEV Community ·

Why HTTP/3 Replaced TCP with QUIC to Fix Web Protocol Bottlenecks

HTTP/3 is the latest version of the web's core data transfer protocol, built to address fundamental limitations in its predecessor HTTP/2. While HTTP/2 improved on HTTP/1.1 by enabling multiple streams over a single TCP connection, it still suffered from head-of-line blocking — where a lost packet stalls all streams sharing that connection. HTTP/3 resolves this by replacing TCP with QUIC, a transport protocol that runs over UDP and handles streams independently, so one lost packet no longer delays unrelated data. QUIC also reduces connection setup time and supports smoother network migration, such as switching from Wi-Fi to mobile data. The core HTTP semantics — methods, status codes, headers, and caching — remain unchanged; only the underlying transport layer is different.

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ProgrammingDEV Community ·

How PostgreSQL Handles Table Bloat: Autovacuum, VACUUM, and VACUUM FULL Explained

PostgreSQL does not immediately remove old row versions after updates or deletions, instead relying on MVCC, which can cause tables to accumulate dead tuples and consume excess disk space. Three mechanisms address this bloat: Autovacuum runs automatically in the background to mark dead tuple space as reusable without locking the table, while manual VACUUM does the same on demand. VACUUM FULL goes further by physically rebuilding the table with only live rows and returning unused space to the OS, but requires an exclusive lock that blocks all concurrent access. A demonstration using a 2-million-row table showed that deleting 1.8 million rows left the physical table size unchanged at 1116 MB until a vacuum operation ran. This highlights that reclaiming actual disk space in PostgreSQL requires deliberate use of the appropriate vacuum strategy depending on downtime tolerance and storage needs.

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ProgrammingDEV Community ·

Developer releases glyphed.js, a zero-dependency TypeScript handwriting animation library

A developer has released glyphed.js, an open-source TypeScript library that renders text, icons, and charts as animated SVG strokes that draw themselves when scrolled into view. Unlike static script fonts, each character is built from real monoline SVG paths and includes randomised variants, slight rotation, and baseline drift so no two renders look identical. The library requires no external dependencies and uses only CSS transitions and IntersectionObserver for animation. It supports 68 tree-shakable icons, several annotation styles, and bar, line, pie, and donut charts with handwritten labels. The package is available on npm and GitHub, and the developer is actively seeking feedback on glyph shapes and usability.

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ProgrammingDEV Community ·

AI Models Show Anchoring Bias; Fast Responders Most Affected, Thinkers Less So

A Kaggle benchmark tested 13 AI models for anchoring bias — a cognitive tendency where irrelevant numbers skew estimates — inspired by Kahneman and Tversky's 1974 wheel-of-fortune experiment. Each model answered 40 estimation questions paired with artificially low or high anchor numbers across five prompt formats. Fast-responding models showed the strongest anchoring, with GPT-4.5 nano scoring 0.52, close to the human benchmark of 0.49. Models that reasoned before answering were largely resistant, scoring between 0.02 and 0.07, though Qwen3 Thinking was a notable exception, anchoring as much as its instant counterpart despite using roughly 2,000 tokens of reasoning. The study highlights a practical concern: AI models embedded in real applications may silently skew outputs like time or cost estimates when unrelated numbers appear nearby in prompts.

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ProgrammingDEV Community ·

GrapheneOS Gains Traction in 2025 as Privacy Concerns Push Users Away from Stock Android

GrapheneOS, a privacy-focused Android alternative, has seen a surge in interest across tech forums like Hacker News and Reddit amid growing concerns over data collection on standard Android devices. A 2025 Google API update reportedly allows 78% of apps to collect location data without explicit user consent, accelerating the shift toward privacy-hardened operating systems. The OS features a hardened kernel, custom SELinux policies, hardware-key encryption, and per-app sandboxing, while benchmark tests show modest boot-time improvements over stock Android 14 on supported devices. Motorola is rumoured to offer the Moto Edge 30 Ultra with GrapheneOS pre-installed, marking a potential first for a major OEM. The EU's Mobile Security Directive also requires five years of security updates, a standard GrapheneOS already meets, further boosting its regulatory credibility.

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ProgrammingDEV Community ·

Durable Task .NET SDK: Five Real-World Use Cases and When Not to Use It

A developer deep-dive examines the practical use cases for the Durable Task standalone .NET SDK (v1.26.0), moving beyond theory to real-world scenarios. The article walks through five examples — invoice approvals, Azure tenant provisioning, subscription payments, out-of-order webhooks, and AI-driven incident investigation — to evaluate where durable execution genuinely helps. Durable Task is positioned as most valuable when workflows are long-running, depend on external systems, or risk being interrupted mid-execution. The piece also cautions against over-engineering, noting that some scenarios are better served by queues, databases, or simple background workers. Crucially, the author reminds readers that durable history does not guarantee exactly-once external effects, an important nuance for production use.

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ProgrammingDEV Community ·

GrapheneOS Gains Mainstream Attention Amid Privacy Concerns and Rumored OEM Adoption

GrapheneOS, a privacy-focused Android alternative, is seeing a surge in interest across platforms like Hacker News and Reddit as users grow increasingly wary of data collection in standard Android builds. The operating system is officially supported on several Pixel devices and is reportedly being considered for pre-installation on the Motorola Edge 30 Pro, potentially marking its shift from a niche project to a mainstream product. GrapheneOS offers features such as kernel hardening, a hardware-backed keystore, verified boot, and network telemetry blocking, and reportedly scores 9.8 out of 10 on an independent mobile security benchmark. Benchmark comparisons suggest the OS delivers around 11% better single-core performance and 24% longer battery life on the Pixel 7 Pro compared to stock Android 13. The project also claims compliance with the EU Digital Services Act and California's CPRA privacy regulations, which may further encourage device manufacturers to adopt it as a default OS.

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ProgrammingDEV Community ·

SRE Hindsight Uses AI and Organizational Memory to Speed Up Incident Response

SRE Hindsight is an AI-powered incident response agent designed to help engineering teams draw on past incidents rather than treating each new production issue from scratch. When an incident occurs, engineers submit key details such as service, symptoms, severity, and environment, after which the agent retrieves relevant historical records and generates an analysis. The system surfaces root-cause evidence, recommended actions, previously failed remediation attempts, and deployment correlations to guide investigators. It distinguishes between confirmed historical facts and current inferences, reducing the risk of presenting uncertain conclusions as definitive. By converting resolved incidents into reusable organizational knowledge, the tool aims to close the gap between institutional experience and active incident management.

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ProgrammingDEV Community ·

7 UI Libraries and Motion Tools Developers Should Consider for Modern Web Apps

A developer-focused guide highlights seven frontend tools — Aceternity UI, Anime.js, Adobe Spectrum UI, Base UI, Animate UI, Lightswind UI, and Flowbite — suited for different web development needs. Aceternity UI offers copy-paste React components with 3D visual effects built on Framer Motion and Tailwind CSS, while Anime.js provides a lightweight, framework-agnostic animation library for fine-grained motion control. Adobe Spectrum UI, backed by Adobe, delivers an enterprise-grade design system with strong accessibility compliance including WCAG support and keyboard navigation. The tools are broadly categorized into high-impact motion libraries, enterprise and base UI primitives, and Tailwind-based utility ecosystems. Each library targets distinct use cases ranging from SaaS landing pages and developer portfolios to complex, accessible desktop-class applications.

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ProgrammingDEV Community ·

AI Incident Response Agent Uses Persistent Memory to Learn From Past Outages

Developers have built an AI-powered incident response tool called Incident Memory Agent that retains and recalls historical production incident data to improve future troubleshooting. Unlike standard AI assistants that analyze each incident in isolation, the system uses a persistent memory layer called Hindsight to surface relevant past experiences when a new incident occurs. The agent follows a four-step loop — Recall, Analyze, Retain, and Reflect — ensuring each resolved incident is stored and available for future reference. In a demonstration, the agent successfully linked a new API latency and Redis memory spike to a nearly identical prior incident, quickly surfacing the previously effective fix. The goal is to shift AI incident response from pure pattern recognition toward accumulated operational experience over time.

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