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ProgrammingDEV Community ·

Developer builds FastAPI-inspired CRUD package for Flutter and Dart

A developer has created fast_crud_api, a lightweight Dart package that brings FastAPI-style server functionality to Flutter and Dart applications. The package is built on top of shelf, an existing Dart web-server middleware library, and exposes four standard endpoints for Create, Read, Update, and Delete operations. The primary motivation was to enable AI agents to interact with Flutter apps by giving them structured access to app data and functionality. Developers can install the package via a GitHub-hosted dependency and configure an API server with just a few lines of code in their main.dart file. The package also supports custom routes, allowing users to bypass CRUD entirely and define their own API endpoints.

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ProgrammingDEV Community ·

Why Testing Third-Party Webhooks Drains Developer Time and How to Fix It

Debugging webhook integrations is a significant but often underestimated drain on developer productivity, particularly in local development environments. The core challenge stems from webhooks being asynchronous — a third-party service may send a callback milliseconds or minutes after the initial request, making the loop hard to control or replicate reliably. Developers frequently get stuck cycling through triggering actions, waiting, and checking logs on both ends without clear visibility into whether the webhook was sent, received, or processed. External control over the third-party service's behavior, combined with network unreliability and state management complexity, makes the debugging process opaque and frustrating. The article proposes a more pragmatic approach to reclaim developer time by addressing these structural inefficiencies in local webhook testing workflows.

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ProgrammingDEV Community ·

Solo SaaS FoxyInvoice Runs Two Products for Under $20 a Month

Developer building FoxyInvoice in public has shared a detailed cost breakdown for running the invoicing platform, revealing total infrastructure expenses of just $10–19 per month. The stack relies on a single low-cost VPS, Cloudflare's free tier for DNS and email routing, and AWS SES for near-zero-cost email sending. No managed database or paid monitoring tools are used, keeping fixed costs minimal while marginal cost per free user remains effectively zero. The unit economics show that just two Pro subscribers at $9 each generate enough net revenue to cover the entire monthly infrastructure bill. The founder notes that reaching 1,000 Pro subscribers would yield roughly $8,400 per month in net revenue, which they describe as the threshold where paid tooling would finally justify its cost.

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ProgrammingDEV Community ·

Developer Uses Skill-Based Leaderboard Game to Make SaaS Product Launches Interactive

A developer behind a platform called BuilderBench has introduced an unconventional product launch strategy centered on a skill-based mini-game. Founders play eight short cognitive and reflex challenges — including reaction time, memory, and typing tests — to earn a composite score. Those who rank in the top five earn a visible SaaS product link on a public leaderboard, replacing the traditional static launch post. The creator argues this format gives visitors a reason to engage before they have any interest in the product itself. The experiment raises a broader question for the founder community about whether interactive launch pages outperform purely informational ones.

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ProgrammingDEV Community ·

Agentic Coding Shifts Software Engineering: Writing Code Is No Longer the Hard Part

The rise of agentic coding in 2026 has fundamentally changed software development, with AI agents now capable of generating large pull requests in seconds rather than merely autocompleting lines of code. However, this speed creates a 'velocity trap' where code output surges dramatically while actual feature delivery to production stagnates, as human review capacity cannot keep pace. Teams under deadline pressure often skip thorough code reviews, leading to more production incidents and a growing mountain of technical debt written by machines at massive scale. A further concern is 'AI slop' — syntactically correct code that runs on basic tests but carries poor abstraction, redundancy, and long-term maintainability issues. Junior developers face particular risk, as AI-provided instant answers may deprive them of the productive struggle that builds deep technical intuition and the judgment needed for complex architectural decisions.

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ProgrammingDEV Community ·

How Microservices and GraphQL APIs Can Eliminate Global Payment Friction

Payment system bottlenecks, not product quality, are often what stall growing startups operating internationally, according to a technical analysis published on DEV Community. Key friction points include high foreign exchange spreads, outdated system integrations, and limited payment method support, all of which contribute to cart abandonment and lost revenue. The article recommends decoupling payment processing through a microservices architecture to allow independent scaling as transaction volumes rise. Real-time FX conversion APIs, such as Currency Layer or Open Exchange Rates, are suggested to keep currency rates transparent and competitive for end users. As a practical example, a Davao-based startup reportedly achieved a 30% revenue increase by combining Stripe and PayPal through a unified GraphQL layer with real-time FX integration.

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ProgrammingDEV Community ·

Xiaomi MiMo-V2.6-Pro tops open-weights AI index by slim margin, $6 plan has credit caveats

Xiaomi's MiMo-V2.6-Pro scored 46 on the Artificial Analysis Intelligence Index v4.3, making it the highest-ranked open-weights model currently available, edging out GLM-5.3 and Kimi K3 by just one and two points respectively. The model is open-source under an MIT licence, though viral posts overstated the performance gap and incorrectly identified the Kimi competitor as K2 rather than K3. In a coding benchmark by independent outlet kingy.ai, MiMo-V2.6-Pro matched Claude Opus 5 on all 23 test cases but at roughly one-thirtieth of the cost per run, helping explain widespread excitement. Xiaomi's $6-per-month Lite plan offers 4.1 billion credits with no hourly usage caps, but credits are not equivalent to tokens — context-heavy tasks using the Pro model can consume two to four credits per token, causing faster depletion than many users expect. The model is a Mixture-of-Experts architecture with 1.02 trillion total parameters, 42 billion active, and supports up to one million tokens of context.

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ProgrammingDEV Community ·

Linear halved CI runner time per test even as test suite quadrupled in size

Project management tool Linear overhauled its CI pipeline after AI coding agents caused a surge in pull requests, roughly quadrupling its test suite since early 2025. The company cut runner time per test by about half and reduced average PR wait time from over six minutes to just over five. Key changes included switching to faster third-party runners, removing TypeScript dependency from ESLint lint rules, capping git fetch depth, and moving cache writes off the critical path. A tech analysis notes these gains were achieved by parallelising workloads — adding shards, faster CPUs, and smarter caching — a strategy that scales well for automated testing. However, the same analysis cautions that code review remains a serial reasoning task that cannot be sharded the same way, meaning review bottlenecks may intensify as AI-generated code volumes continue to rise.

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ProgrammingDEV Community ·

How Python Developers Can Fix Warped Phone Photos in OMR Grading Systems

Optical Mark Recognition (OMR) grading systems, widely used to evaluate multiple-choice exams, face accuracy problems when processing photos taken on smartphones. Geometric distortions such as perspective warp, tilted angles, and uneven lighting can cause coordinate-based systems to misread answer bubbles. Unlike clean scanned documents, phone images shift fixed pixel coordinates enough to produce incorrect grading results. Developers can address this by applying OpenCV perspective transforms, object detection models like YOLO, or image preprocessing techniques such as thresholding and edge detection. Combining multiple approaches is recommended for the most reliable outcome.

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ProgrammingDEV Community ·

Two AI Code Review Benchmarks Pick Different Winners Using Opposite Methods

Two independent benchmarks evaluating AI code review tools — one by LinearB and one by DeepSource — reached opposite conclusions about which tool performs best, yet both ranked their own product first. LinearB tested 16 bugs across two phases, scoring tools on competency, clarity, configurability, and developer experience, naming itself the top performer for signal-to-noise ratio. DeepSource used the public OpenSSF CVE Benchmark of 200-plus real vulnerabilities and reported the highest F1 score of 84.51% for itself, while scoring CodeRabbit at just 36.19%. Despite disagreeing on winners, both evaluations independently identified the same key qualities that separate useful AI reviewers from noisy ones: signal-to-noise ratio, statefulness across commits, and configurability. Experts and readers are advised to study each benchmark's methodology rather than simply accepting its declared winner, as the two tests measure fundamentally different failure modes.

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ProgrammingDEV Community ·

Linear and Salesforce both found validation, not code generation, bottlenecked AI workflows

Two engineering teams, Linear and Salesforce, independently published findings showing that AI-assisted coding created downstream bottlenecks in validation rather than in code generation itself. Linear reported in September 2026 that its CI pipeline struggled to keep pace after test suites nearly quadrupled, prompting infrastructure changes that cut pipeline time by around 34% and reduced typecheck time by 73%. Salesforce engineers Shan Appajodu and Ravi Boyapati documented a separate but related problem, where a roughly 30% rise in code volume led to larger pull requests and review latency that climbed quarter over quarter. The most alarming signal Salesforce identified was that review time on the largest pull requests plateaued, suggesting reviewers had stopped meaningfully engaging with oversized, context-heavy diffs. Together, the two reports point to a shared structural gap: as AI lowers the cost of producing code, the systems designed to verify that code have not scaled at the same rate.

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ProgrammingDEV Community ·

Developer's crypto fact-checker falsely confirmed a wallet group with zero members

A software developer built an open-source tool to fact-check crypto claims by querying Nansen's API and returning verdicts such as CONFIRMED or UNVERIFIABLE. The tool malfunctioned last week, returning CONFIRMED for a claim about a whale wallet group that Nansen's data showed had zero tagged members. The bug stemmed from a missing presence check in the code branch handling 'holding' claims, even though the developer had already documented Nansen's sparse whale-labelling as a known limitation. The flow and buying/selling branches correctly called a presence-verification function before issuing verdicts, but the holding branch skipped this step entirely and defaulted to CONFIRMED. The developer has publicly disclosed the error, shared the relevant code, and noted the flaw was effectively pre-warned in the repository's own documentation.

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ProgrammingDEV Community ·

Dev Documents Full CI/CD Pipeline for Solo SaaS App, Including Three Real Failures

A developer building FoxyInvoice, a real production invoicing app, has published a detailed account of their CI/CD pipeline as part of an ongoing open-development series. The pipeline runs directly from the main branch to production with no staging environment, relying on parallel gates covering unit tests, security checks, and secret scanning before any deployment proceeds. Three real incidents are documented, including a masked build failure that kept a broken deploy running for eight hours, a zombie concurrency lock left by a cancelled job, and a YAML parsing error that caused a deploy label to match nothing. Database migrations add complexity to rollbacks, with the team opting for forward-fix patches rather than true schema reversals. The author argues that for solo developers, the greatest benefit of automated deployment is keeping the habit of shipping code frequently rather than batching changes into infrequent releases.

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ProgrammingHacker News ·

Web-Based Emulator Brings IBM 1620 Mainframe and 1963 Software Back to Life

A web-based emulator for the IBM 1620, a transistor-based scientific computer from the early 1960s, has been shared on Hacker News. The project, hosted on GitHub by developer Paul Kimpel, recreates the IBM 1620 hardware environment entirely in a browser. It also includes IPL-V, a programming language interpreter that dates back to 1963. The emulator allows users to experience vintage computing without physical hardware. The project attracted modest attention on Hacker News, garnering 7 points and 2 comments.

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ProgrammingDEV Community ·

Shorebird Lets Flutter Developers Push App Fixes Without App Store Review

Shorebird is a code push tool for Flutter that enables developers to deploy Dart code updates directly to users, bypassing the Apple App Store and Google Play Store review processes. It is designed to address critical production bugs in minutes rather than the 24–48 hours typically required for app store approval. The tool supports staged rollouts, automated crash rollbacks, and detailed analytics on patch adoption. Developers can integrate Shorebird into existing CI/CD pipelines and initialize it within a Flutter project using a command-line interface. It requires Flutter SDK 3.0 or higher and a registered account on shorebird.dev to get started.

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ProgrammingDEV Community ·

Bug in watch-mode scrapers could bill buyers twice for already-delivered data rows

A software bug was discovered in watch-mode data scraping Actors that caused previously delivered and paid-for data rows to be re-delivered and potentially re-billed to buyers. The flaw stemmed from a capped baseline system that silently evicted older record IDs when full, causing the next polling run to treat those IDs as new. High-volume sources where a single run could return more IDs than the cap allowed were especially vulnerable, and the issue was confirmed across at least 22 different Actors including scrapers for Google Play reviews, clinical trials, and FDA recalls. The bug was particularly difficult to detect because affected runs appeared completely normal and successful, with the billing discrepancy only surfacing later in invoices. A fix has been deployed that tracks and surfaces eviction events through log warnings, status messages, run summaries, and webhook notifications, though full prevention of re-delivery requires a more substantial architectural change.

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ProgrammingDEV Community ·

Authorization Holds Expire Silently, Catching Merchants Off Guard at Capture

Payment authorization holds have network-specific expiry windows — typically 7 days for Visa and shorter for many Mastercard issuers — but these expirations are not communicated via response codes, leaving merchant systems showing stale holds as valid. A developer discovered this flaw while building a rental deposit flow where booking authorization and checkout capture were separated by up to 12 days. When a capture is attempted on an expired hold, processor behavior varies widely: some return a generic decline, some silently re-authorize, and some settle the transaction and defer risk to the acquirer. With no built-in visibility into which outcome would occur, the team built a nightly job to flag any pending capture older than five days and trigger a fresh authorization check. The issue highlights a broader gap in payment infrastructure transparency, prompting discussion on whether merchants should track hold expiry per card network in their own systems.

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ProgrammingDEV Community ·

Linux Landlock LSM Lets Unprivileged Users Sandbox Apps Without Root Access

Landlock is a Linux Security Module introduced in kernel version 5.13 that allows processes to restrict their own filesystem access without requiring root privileges or administrator intervention. Unlike established security frameworks such as SELinux or AppArmor, Landlock is designed for simplicity, enabling developers to define per-process access rules using straightforward system calls like landlock_add_rule(). Rules are strictly additive in restriction — once set, they can only further limit access and cannot be reversed or expanded during a process's lifetime. A practical use case includes sandboxing a browser process to a single temporary directory when rendering potentially unsafe email attachments, eliminating the need for full virtual machines or containers. However, Landlock covers only filesystem access controls and does not protect against network-based attacks or other threat vectors, so careful rule planning is essential.

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ProgrammingHacker News ·

Google Labs Expands CC AI Agent to Support Family Groups

Google Labs has introduced an expanded version of CC, an AI agent designed to assist families and small groups. The tool aims to help multiple users coordinate and communicate more effectively using AI capabilities. CC is being rolled out as part of Google's broader push to make AI useful in everyday household and group settings. The announcement was made via the official Google blog under its innovation and AI division.

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ProgrammingDEV Community ·

Nearly 15,000 Kubernetes Dashboards Found Publicly Exposed on the Internet

A ZoomEye search using the query title="Kubernetes Dashboard" returned 14,913 matches on September 23, 2026, revealing thousands of Kubernetes administrative interfaces reachable from the public internet. Unlike standard web applications, these dashboards are designed to manage workloads and can allow users to list pods, read secrets, and execute commands inside containers, making unintended exposure particularly risky. Such exposures often occur accidentally through misconfigurations like changing a service type to LoadBalancer or setting up an incorrect ingress rule. Security researchers note that even a single exposed dashboard with weak access controls can pose greater risk than thousands of exposed static websites. Recommended mitigations include treating management interfaces as internal-only by default, enforcing VPN or authenticated proxy access, disabling skip-login options, and using external scanning tools to audit your own address space for inadvertent exposure.

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