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ProgrammingDEV Community ·

Guide Highlights Tips to Improve Roblox Performance and Safe Tool Usage

Roblox is a widely popular gaming platform offering diverse experiences including adventure, RPGs, and simulators, accessible across multiple devices. Players can customize characters and explore various game modes, with some seeking external script tools to expand in-game capabilities. Experts caution that before installing any third-party application or APK file, users should carefully verify its source and compatibility with their device's operating system and available memory. Compatibility between external tools and Roblox updates is a key concern, as platform changes can break functionality in third-party programs. Maintaining updated software, closing unused apps, and freeing up storage are recommended steps to ensure smoother gameplay performance.

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ProgrammingDEV Community ·

Developer Builds Linux Device Manager, a GTK4 GUI Unifying All Hardware Tools

A developer has released Linux Device Manager (LDM) v0.2.0, an open-source GTK4 desktop app designed to bring Windows-style device management to Linux. The tool consolidates information from sysfs, udev, lspci, lsusb, dmesg, and other CLI utilities into a single categorised tree view. It supports safe enable and disable of devices via USB authorisation and driver bind/unbind, protected by a polkit-authenticated helper. LDM is available under GPL-3.0 and can be installed on Debian, Ubuntu, Fedora, RHEL, and Arch Linux, with AppImage and Flatpak options also provided. The project is seeking community help with hardware testing, distribution packaging, and a pending Flathub submission.

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ProgrammingDEV Community ·

Content Unavailable: Article Failed to Render Properly

The source article titled 'Django Messages Framework' from DEV Community could not be processed due to a Liquid template rendering error. The system encountered an unknown tag 'extends', which prevented the page content from loading. As a result, no factual information from the article is available for summarization. This is a technical issue on the source platform's end, not a problem with the news item itself. No summary can be responsibly produced without verifiable content to reference.

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ProgrammingDEV Community ·

PeerPlay vs Testers Community: Which Tool Helps Indie Devs Pass Google Play Testing?

Indie Android developers publishing on personal accounts must recruit at least 12 real testers for 14 days to meet Google Play's closed testing requirement before going live. Two platforms — Testers Community and PeerPlay — aim to solve this problem but differ in pricing models and guarantees. Testers Community offers paid plans at $15 for 15 testers or $25 for 25, with a money-back production access guarantee, plus a free credit-based tier. PeerPlay, built by a developer who faced the same hurdle, offers a free reciprocal exchange tier and paid options ranging from $24.99 to $34.99, the latter including automatic tester replacements. The choice largely depends on whether developers prefer paying with money for simplicity or with time through app-for-app testing swaps.

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ProgrammingDEV Community ·

Developer Builds Shift Scheduling App UnbindShift, Seeks Feedback from Teams

A developer is building a small application called UnbindShift aimed at simplifying shift scheduling for teams that work rotating hours. The tool is designed to let employees easily submit their availability while helping managers convert that input into a schedule without relying on spreadsheets or messaging apps. The project is in its early stages, and the creator is currently gathering insights on how teams handle availability collection and scheduling today. A waitlist has been opened at unbindshift.com for those interested in testing the app once it is ready. The developer is also welcoming critical feedback, including whether the problem being addressed is the right one to solve.

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ProgrammingDEV Community ·

Bank Strike from Sept 28: What Customers Should Know Before 3-Day Disruption

A three-day bank strike is reported to begin on September 28, 2026, potentially disrupting branch-level banking services across India. Customers are advised to plan ahead by withdrawing sufficient cash, clearing pending cheques, and submitting important documents before the strike begins. Digital services such as UPI and ATMs are generally expected to remain operational, though confirmation from individual banks is recommended. The period from September 26 to 30 could see extended banking disruption due to the strike coinciding with weekends or holidays. Customers are urged to check their bank's official communications for accurate and up-to-date information rather than relying on general assumptions.

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ProgrammingDEV Community ·

Developer Builds $20 AI-Run Company Using Five Claude Agents on Cron Schedule

A developer launched a small automated business called Leymish for just $20, handing day-to-day operations entirely to five Claude Code AI agents running on scheduled GitHub Actions workflows. Each agent — CEO, Builder, Growth, Verifier, and Board — communicates through shared Markdown files, with a backlog table serving as the coordination layer between roles. Since agents have no memory between runs, all business state, strategy, and task history is stored in structured files that persist across sessions. Guardrail scripts automatically revert any edits to protected files and block runs that contain leaked secrets, malformed financial records, or misleading marketing copy. The entire setup runs within GitHub's free 2,000 monthly Actions minutes, with publishing handled via official APIs and the site hosted on GitHub Pages at no additional cost.

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ProgrammingDEV Community ·

Developer builds keyword-based deferred tool loading for open-source desktop AI assistant

A developer has built Ankita, an open-source desktop AI assistant using Electron and a terminal CLI, powered by GitHub Copilot models with a strict constraint of zero runtime npm dependencies. To avoid burning tokens by loading all tool schemas upfront on every request, the developer implemented a deferred tool-discovery system where a single 'find_tools' call loads only the relevant tools needed for a given task. Matching is handled through a curated keyword and category system using word-boundary regex checks rather than embeddings or vector indexes, keeping the logic synchronous, predictable, and dependency-free. The trade-off is intentional: while embeddings would better handle paraphrasing, a keyword-based approach is easier to debug, costs nothing at runtime, and suits a desktop environment where the developer controls both ends. Disambiguation rules are also hardcoded to prevent unrelated tool schemas from loading when queries overlap across categories.

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ProgrammingDEV Community ·

Why Sticky Session Routing Without TTLs Quietly Causes Backend Imbalance

Session affinity routes clients to the same backend node consistently, but problems arise when assignment records are never deleted after a client disconnects or goes idle. Over time, stale rows accumulate in the routing table, causing the load-balancing logic to misjudge which nodes are least loaded. This gradually concentrates traffic on a small number of nodes, producing imbalance that appears unrelated to any routing bug. The recommended fix is adding a TTL to each assignment, refreshed on every active use, rather than relying on explicit delete-on-disconnect events that may never fire. Developers using DynamoDB should note that its native TTL deletion is best-effort and not instantaneous, so expired records may briefly persist beyond their expiry time.

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ProgrammingDEV Community ·

How to Connect Shopify to GA4 Without Google Tag Manager Using Native Events

Shopify's Google & YouTube sales channel can send the full GA4 ecommerce event set natively in minutes, eliminating the need for Google Tag Manager. However, browser-side data loss from ad blockers, iOS tracking prevention, and ITP can cause GA4 purchase counts to fall short of actual Shopify orders. To close this gap, developers recommend adding a server-side purchase event that sends data to GA4 via the Measurement Protocol through a Shopify webhook. Setting up the integration requires creating a GA4 property with matching timezone and currency, then connecting it through the Shopify Google & YouTube channel using the same Google account that owns the property. Additional best practices include extending data retention to 14 months on day one and enabling Enhanced Measurement, since the default two-month retention window prevents year-over-year analysis.

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ProgrammingDEV Community ·

Developer shares free SKILL.md template to turn AI into a Python coding mentor

A self-taught developer has created and open-sourced a SKILL.md template designed to configure AI tools like ChatGPT, Claude, and Lumo AI into structured Python tutors rather than answer machines. The template is grounded in established educational concepts, including scaffolded hints, Zone of Proximal Development, and a three-tier concept breakdown covering analogies, syntax, and internal Python mechanics. It also introduces the L.I.F.T. code review framework, which evaluates code on Logic, Idiomatic Pythonness, PEP 8 formatting, and time-space complexity. The approach aims to address a gap for self-taught developers who cannot afford bootcamps or CS degrees and currently rely on AI tools that bypass active problem-solving. The template is compatible with multiple AI platforms and local agents, and the author has shared it on DEV Community to gather feedback for further improvement.

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ProgrammingDEV Community ·

SQL Subqueries and CTEs Explained With Real-World Data Analysis Examples

SQL subqueries and Common Table Expressions (CTEs) are techniques that help analysts break complex data questions into smaller, manageable steps. A subquery, also called a nested or inner query, is written inside another SQL query and passes its result to the outer query for further processing. For instance, finding employees who earn above the company average requires first calculating that average, which a subquery can handle automatically within a single statement. This approach is especially useful with dynamic data, as the query recalculates results each time it runs rather than relying on hardcoded values. The article further classifies subqueries by the number of values they return and how they interact with outer queries, alongside a comparison with CTEs.

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ProgrammingDEV Community ·

Developer Scraps Startup Idea in One Afternoon Using a Four-Question Evidence Check

A software developer recently abandoned a startup idea he had been enthusiastic about after spending a single afternoon rigorously stress-testing it with evidence-based questions. He had identified what appeared to be a validated market, a funded competitor with strong traction, and a technical edge — classic signals builders act on. Closer investigation revealed the competitor had no confirmed paying customers, only free-tier users and unverified early trials, meaning marketing traction had been mistaken for genuine market validation. Further research showed his supposed technical edge was already well-documented in recent academic papers and open-source projects, making it far from novel. A practical test of his core tool then revealed it blocked all legitimate user actions alongside malicious ones, confirming the product was unusable — a flaw he credits the afternoon's discipline with catching before months of wasted effort.

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ProgrammingDEV Community ·

Critical Hardcoded JWT Key Flaw in Issabel PBX Framework Enables Remote Code Execution

A severe vulnerability, tracked as CVE-2026-89026 with a CVSS score of 9.8, was discovered in the pbxapi component of Issabel Framework, an open-source unified communications platform built on Asterisk. Every deployment shipped with the same hardcoded HS256 signing key, allowing any attacker who obtained it to forge valid authentication tokens for any installation worldwide. Using a crafted token, an attacker could invoke the management originate function, which passes unsanitized input directly to Asterisk for execution under its process privileges. Successful exploitation could enable toll fraud, theft of call recordings and voicemail, harvesting of extension credentials, and lateral movement into connected systems. The flaw was patched in upstream commit b97dbaf, and administrators are urged to apply the fix, rotate signing secrets, and audit logs for signs of compromise during the exposure window.

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ProgrammingDEV Community ·

How One Team Built an AI Voice Agent Command Center Using Supabase and VAPI

A development team has built a production-grade command center for Quiet Hours Valet, a real estate and services company, capable of running eight concurrent AI voice agents simultaneously. The system is built on Supabase, VAPI, and self-hosted infrastructure, with a five-page Next.js frontend and an eight-table PostgreSQL schema managing scheduling and routing. Supabase Edge Functions handle VAPI webhook callbacks, enabling reliable database mutations without the overhead of serverless Lambda functions. The architecture supports eight automation scenarios and real-time customer management, allowing a single operator to oversee multiple autonomous agents at once. The team has shared the build as a technical reference for developers looking to scale voice AI systems beyond the proof-of-concept stage.

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ProgrammingDEV Community ·

Google's AI Data Centers Shift from Grid Consumers to Active Grid Stabilizers

Hyperscale AI data centers are being redesigned to act as active participants in the electric grid rather than passive power consumers. Newer campuses equipped with grid-interactive architecture use on-site battery systems to discharge stored energy back into the distribution network during peak demand periods. Integrated control software continuously balances compute workloads, thermal loads, and grid conditions, allowing the same batteries used for uptime protection to also provide grid-stabilization services. This approach avoids the need for entirely new capital equipment, as the incremental cost involves mainly software and interconnection upgrades. The shift redefines data centers as dispatchable grid resources, particularly valuable during extreme heat events when AI training loads and regional electricity demand peak simultaneously.

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ProgrammingDEV Community ·

Dev Studio Ships Two Technical Books in 10 Days, Catches Critical Package Version Errors Pre-Launch

Between September 4 and 13, 2026, a solo development studio shipped 113 commits across 7 days, touching 497 files, as part of an intensive build sprint. Two books were published on Amazon KDP during this period: 'The Micro-SaaS GTM Playbook' on September 10 and 'Model Context Protocol for the One-Person Stack' on September 11. The MCP guide was written to address real-world setup failures not covered in official documentation, targeting solo developers who cannot afford lengthy debugging detours. During the fourth review round of the MCP book, nine out of ten printed package version pins were found to return 404 errors on npm, despite the packages themselves resolving correctly — a defect introduced by a prior revision rule demanding precise version pinning. The studio caught and corrected the errors before publication, noting that any rule requiring precision must be paired with its own verification step to avoid introducing new categories of mistakes.

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ProgrammingDEV Community ·

systemd's mstack silently overwrites read-only files due to unclear writable-layer default

A developer testing systemd's new mstack tool — introduced in systemd 260 in March 2025 — found that mounting a single-layer directory made it writable by default, causing a read-only file to be permanently overwritten with no error or warning. The mstack feature simplifies overlayfs mounts by letting users describe layered directories with symlinks instead of lengthy mount commands, and gained broader support in systemd-nspawn with the June 2025 release of systemd 261. During testing inside a standard Docker container, mstack produced a cryptic error referencing an internal function called '(layerfd)' when attempting to stack overlayfs on top of Docker's own overlay2 filesystem — a long-standing Linux kernel restriction. The same operation using a hand-written mount command fails too, but with a clearer message about unsupported upper directories. The workaround is to place the mount layers on a non-overlayfs filesystem such as tmpfs or a bind-mounted host directory.

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