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ProgrammingDEV Community ·

Working code is not enough: developers urge focus on understanding and judging software

A DEV Community author argues that code that merely runs is not the same as good engineering. They point to questions about handling unexpected inputs, maintainability, root-cause fixes, scalability, and explaining design decisions. The piece suggests learning moves from frameworks and debugging to reasoning about systems, open source, and real projects. It also notes that AI speeds up coding, so the key skill becomes evaluating and testing generated code rather than just producing it. The author closes by inviting readers to share hard-won engineering lessons.

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ProgrammingDEV Community ·

JavaScript Promise Patterns: All, AllSettled, Any, Race and Concurrency Control

A DEV Community guide explains how developers can go beyond basic Promise usage in modern JavaScript. It outlines error handling approaches, including try/catch with async/await and a reusable pattern returning data and error pairs. It compares Promise.all, Promise.allSettled, Promise.any and Promise.race, describing when each one suits a given scenario. The article also recommends limiting concurrency rather than firing many requests at once, and shows how to add timeouts, retries and cancellation via AbortSignal. Firefox is noted as fully implementing the Promise specification and its static API.

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ProgrammingDEV Community ·

SoloBooks AI Offers Local-First Receipt and Expense Tracking for Freelancers

A developer has built SoloBooks AI, an open-source expense and receipt organizer aimed at freelancers and side hustlers. The tool uses OCR and AI-assisted extraction to process uploaded receipts and gather them into one organized record. Users can review and visualize spending on a dashboard and export their data as CSV for bookkeeping. It runs Gemma 3 4B through an Ollama-compatible setup, which allows inference to be done locally rather than through a hosted API. The developer notes it is a prototype and not a substitute for professional accounting or tax advice.

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ProgrammingDEV Community ·

Reverse-engineering the undocumented session logs of Claude Code, Codex and Mistral Vibe

Claude Code, Codex and Mistral Vibe write every action to disk as it happens, but none publishes the format of those files. The author, who builds the open-source tool Agent Standup, reads these logs to show which agents are active, waiting, or prompting for input. The article explains where each tool stores sessions, which record types matter, and how sub-agent transcripts are organized. It warns that token usage is repeated per content block, so messages must be counted once by ID, and that sub-agent reports may arrive through tool calls rather than text. The formats were checked against sessions from October 2026 and may change without notice.

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ProgrammingDEV Community ·

Developer Guide Shows How to Build Autonomous AI Agents on Solana with LangChain

A developer tutorial by Kenneth Okenwa explains why Solana suits autonomous AI agents that need to make frequent, low-value payments. The article argues traditional payment rails like Stripe and bank wires are impractical for agents because of KYC requirements and high minimum fees. It highlights Solana's sub-second block times, sub-cent transaction fees, and parallel execution as key advantages. The guide then walks through building an agent that combines a LangChain reasoning layer with the Solana Agent Kit to inspect on-chain state and execute transactions.

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ProgrammingDEV Community ·

Hacktoberfest AI Challenge Week 2 Asks Builders for Local, Open-Source Side Hustle Tools

DEV Community published a Week 2 prompt for the Hacktoberfest Open-Source AI Challenge, themed around side hustles built on open-weight models, open agent frameworks, or local inference. Participants are asked to explain why open components matter for their project, such as offline use, data privacy, fine-tuning, or lower costs. The post encourages small, practical tools for real users like freelancers or local shop owners, with bonus credit for getting a first user. As a suggested example, it outlines DukaanAI, a tool that generates product descriptions, WhatsApp messages, and Instagram captions for clothing shopkeepers using an open-weight model served through Ollama or a hosted open-model service. The post also cautions that hosted models are not automatically private or free, so builders should document the model, its license, hosting costs, and data handling.

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ProgrammingDEV Community ·

JavaScript Event Loop Explained: Microtasks, Macrotasks, async/await and Rendering

This guide explains how the JavaScript event loop lets a single-threaded language handle asynchronous work without blocking. It describes the call stack, the macrotask (task) queue, and the microtask queue, and how the loop processes them in order. Using short code examples, it shows that synchronous code runs first, then all microtasks such as Promise callbacks, then a single macrotask such as setTimeout. It also covers how async/await builds on Promises, why long-running or endlessly chained microtasks can freeze rendering, and why requestAnimationFrame suits animation. The article includes guidance on profiling long tasks in Firefox DevTools.

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ProgrammingDEV Community ·

How to Write a Spec an AI App Builder Can Actually Build From

AI app builders fill gaps in vague prompts with generic guesses, so a clear spec reduces how much the model has to invent. The article recommends covering seven key areas: users, core jobs, screen list, data model, navigation, states, and constraints. It advises defining the data model before the screens, since many wrong outputs stem from never specifying what a record contains. Rather than requesting an entire app at once, the author suggests generating a skeleton and then refining one screen at a time with small, testable requests. A complete example spec is provided that readers can adapt for their own projects.

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ProgrammingHacker News ·

Bark: A Toll-Free BBS Revival Aimed at 90s Teens

A blog post introduces Bark, a toll-free bulletin board system designed to recall the BBS culture popular among teenagers in the 1990s. The article was shared on Hacker News, where it gathered a small amount of attention with 4 points and no comments at the time of listing. The source material provides only the article link and basic Hacker News metadata, so details about the project's features, operators, and launch date are not available here. Readers would need to visit the original blog post to learn more about how Bark works and what it offers.

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ProgrammingHacker News ·

Qualcomm Wins Legal Ruling Finding Arm Breached Its Chip License Agreement

A legal proceeding has found that Arm breached its licensing agreement with Qualcomm, the chipmaker reported. The ruling resulted in a monetary award to Qualcomm, reported as $2. The dispute concerns the terms under which Qualcomm uses Arm's chip architecture technology. The source article, published by TechPowerUp, provides further details on the case. Specific details beyond the headline are limited in the available text, so the full scope of the ruling remains unclear.

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ProgrammingDEV Community ·

Firefox Tools for Tracking Down Browser Memory Leaks

A developer guide explains how memory leaks in browser tabs can be measured and diagnosed using Firefox's built-in tools. It outlines common causes of leaks, such as event listeners that are never removed, closures holding large objects, accidental globals, uncleared timers, unbounded caches, and detached DOM trees. The article walks readers through using the about:memory page to take snapshots and interpret memory categories. It also describes the DevTools Memory panel, where heap snapshots can be compared and sorted by retained size to find objects holding the most memory. Code examples show how leaks occur and how to fix them by clearing references and removing listeners.

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ProgrammingDEV Community ·

WebRTC in Firefox: Video Calls, Data Channels and Privacy Controls

A developer guide explains how WebRTC lets browsers handle real-time audio, video, screen sharing, and peer-to-peer data transfer without a server carrying the file data. It covers how Firefox requests camera and microphone access per site, and how users can check or revoke those permissions. Code examples show capturing media with getUserMedia, selecting specific devices, and sharing a screen, window, or tab with getDisplayMedia. The article notes that Firefox cannot capture system audio during screen sharing, unlike Chrome. It also outlines a basic peer-to-peer call setup using RTCPeerConnection and an external signaling channel.

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ProgrammingDEV Community ·

Only one of 81 AI startup credit offers can be claimed automatically, data shows

A review of a machine-readable catalogue of 2026 startup credit offers found that the AI and ML category holds 81 offers from 72 companies. Roughly two-thirds state a dollar value in the title or summary, but most do not spell out what the company must give in return. Nearly half reference a funding stage in their eligibility rules, a criterion that typically requires human review. Of the 81 offers, 73 are obtained through a form, and only one can be claimed automatically.

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ProgrammingDEV Community ·

Using XPath in Firefox: Console Shortcuts, JavaScript API, and DevTools

Firefox supports XPath both in JavaScript and through its built-in DevTools features. The DevTools console provides a $x() function that evaluates XPath expressions against the current page, which is useful for testing selectors. The JavaScript document.evaluate() API is more verbose but offers several result types, such as snapshots for collecting all matches or single nodes for the first match. The Inspector can copy an element's shortest or full XPath, and the article notes that XPath handles parent traversal and text-based selection better than CSS, while CSS remains more readable for standard selectors. The guide also covers scraping structured data and using namespace resolvers for XML documents such as SVG.

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ProgrammingDEV Community ·

Teams mixing Claude Code and Codex on one repo need shared instructions, task claims and decision logs

A guide explains how teams whose members use different AI coding agents, such as Claude Code and Codex, can avoid working at cross-purposes on a shared repository. Since Claude Code version 2.1.277, it reads AGENTS.md when no CLAUDE.md exists, so teams can keep one instruction file instead of two that drift apart. The author recommends requiring agents to claim a task before planning, since silent duplicate work is more costly than merge conflicts. A DECISIONS.md file logging each decision and the alternatives rejected is proposed so that agents do not repeat settled debates. Finally, structured handoff notes covering completed work and next steps help the next person's agent pick up unfinished tasks.

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ProgrammingDEV Community ·

Firefox Print CSS Guide Covers Page Breaks, Table Headers and DevTools Preview

A DEV Community article offers developers a walkthrough of print stylesheets in Firefox. It explains how to emulate print media in DevTools and how to preview output using Ctrl+P. The piece covers @media print rules, such as hiding navigation elements and controlling page breaks with modern break properties. It also addresses print-specific details for tables, code blocks, and page margins, and notes that background colors typically do not print by default.

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ProgrammingDEV Community ·

AI Margin Squeeze: Why Each New Customer Can Cost More to Serve

Costs that were once fixed, such as developer salaries, are becoming variable as AI usage fees scale with activity rather than headcount, making budgeting and fixed-price contracts harder. Faster AI output has shifted the bottleneck to human review, where scarce senior engineers must check generated code for security, performance, and logic flaws. Data preparation remains a costly hidden factor, since each client's data is typically messy and requires custom effort that does not shrink with scale. Rising talent costs and growing governance demands, such as data handling and accountability questions, add overhead that grows with the number of clients. Together, pressure on pricing from clients expecting AI-driven discounts and rising complexity of delivery costs squeeze margins, especially for mid-sized firms lacking scale or niche premium pricing.

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ProgrammingDEV Community ·

Dual-Pass Polygon Technique Creates Stroked Lines in Pure CSS Charts

CSS clip-path can fill a polygon but cannot draw a stroke, so chart libraries such as st-core simulate line thickness with a two-pass polygon. The method walks the data points forward along the top edge, then backward along a parallel edge offset by the line width, forming a ribbon. The article shows how FSCSS features like @arr, count(), .reverse, and inline() generate the polygon points from CSS variables. The resulting closed band is filled with an accent color so it reads as a line. This approach lets the number of data points vary without hardcoding polygon stops.

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