SShortSingh.

Programming

0
ProgrammingDEV Community ·

Why Service Metadata Should Be Machine-Generated, Not Hand-Written

Software engineer Anton, who is migrating a PHP monolith into Go microservices, identified a silent failure mode where Go's linker ignores an -X version flag if the target symbol is missing, causing binaries to silently report incorrect version metadata. This same pattern of undetected drift, he argues, applies to hand-written service documentation, which can quietly fall out of sync with the actual codebase without triggering any alerts or build failures. In his setup, service composition was already declared in a machine-readable manifest used by the runtime and deployment pipeline, but a separate prose description of the same service existed alongside it. After recognising the risk, he replaced the hand-written description with machine-generated artefacts — an environment variable catalog and a metrics snapshot — both derived directly from code and the manifest, committed to the repository, and verified by CI drift checks. His core argument is that a service description only stays accurate when it is produced by the system itself rather than maintained by a person.

0
ProgrammingDEV Community ·

Card RS launches as a customizable card component for Rust WASM frameworks

A new open-source UI component called Card RS has been released for Rust-based WebAssembly frontend frameworks, specifically targeting Yew, Dioxus, and Leptos. The library provides a composable card component with sub-elements for headers, titles, descriptions, content areas, and footers, eliminating repetitive boilerplate code. Card RS includes a four-tier variant matrix — Transparent, Default, Secondary, and Tertiary — to support visual hierarchy without manual class overrides. The component is built with accessibility in mind, defaulting to ARIA role="article" and enforcing aria_labelledby bindings in line with WCAG guidelines. Developers can install it via Cargo by selecting the appropriate feature flag for their chosen framework.

0
ProgrammingDEV Community ·

Dev Builds Public Codex Reset Tracker That Never Touches Private Account Data

A developer has built a tool called Codex Reset Live that tracks public reset signals for OpenAI's Codex without accessing any private user account information. The tracker monitors public sources — including OpenAI's status endpoint and a configured X profile feed — using a Cloudflare Worker that runs on a five-minute schedule. Each check classifies findings into conservative states such as YES, ANNOUNCED, NOT YET, or UNKNOWN, deliberately keeping public announcements separate from confirmed completions. Results are stored in Cloudflare KV and served via a public API endpoint, so users can view sourced status updates without any private data being exposed. The tool is designed to answer only what public signals can be verified, directing users to their own Settings and Usage page for personal reset timing.

0
ProgrammingDEV Community ·

Badge RS Brings Ready-Made Badge Components to Yew, Dioxus, and Leptos

Badge RS is a new open-source badge component library released for Rust-based WebAssembly frameworks, specifically Yew, Dioxus, and Leptos. It provides notification counters, status dots, and overflow labels with built-in support for positioning, color theming, sizing, and accessible markup. A key feature is its Shape enum, which mathematically corrects badge placement on circular elements like avatars using a trigonometric offset of roughly 14.64%, a detail most badge implementations overlook. The library offers a consistent API across all three supported frameworks, requiring minimal code to attach a self-positioning badge to any element. Badge RS aims to eliminate the need for developers to hand-roll badge components or debug pixel-level positioning issues from scratch.

0
ProgrammingDEV Community ·

Gateway pattern keeps API credentials away from AI agents running MCP servers

Developers using MCP servers in AI agents commonly store live API keys directly in the agent's environment, exposing them to theft via prompt injection or compromised dependencies. A more secure approach places a trusted gateway process between the agent and the MCP server, so the agent only receives a short-lived, scoped token rather than the actual credential. The gateway injects the real API key at the moment of each tool call and strips it from any response returned to the agent. This architecture also acts as a policy enforcement point, allowing operators to restrict which tools each agent can access and to log every call in a tamper-resistant location. An open-source tool called Agenthof, written in Go under the Apache 2.0 license, is offered as one implementation of this credential governance pattern.

0
ProgrammingDEV Community ·

Developer Argues Algo Trading Edge Lies in Skipping Most Slots, Not Filling Them

A developer publishing a multi-part series on algorithmic trading strategy argues that a healthy prediction-market engine should skip the majority of available 5-minute trading slots rather than treat each one as a mandatory order. The post outlines specific conditions that make a slot 'illegal' to trade, including stale TWAP data, missing reference prices, ask/bid prices outside a 45–55 cent band, and insufficient time within the slot window. The author contends that engines logging only fills are recording accidents, not strategy, and that skips should outnumber fills on a well-functioning trading day. Code examples show that the signal layer is explicitly designed to return a 'none' side and log a skip reason as a successful outcome. The post is framed as part of a broader series and is accompanied by links to the author's Polymarket activity and GitHub repository.

0
ProgrammingDEV Community ·

Avatar RS brings full-featured avatar components to Yew, Dioxus, and Leptos

A new open-source library called Avatar RS has been released for Rust-based WebAssembly frameworks, including Yew, Dioxus, and Leptos. The library provides ready-to-use avatar components that handle image loading, fallback text or icons, size variants, color themes, and accessible markup out of the box. It is built on top of Image RS, a WASM-native image primitive that adds lazy loading via the Intersection Observer API, blur-up placeholders, and responsive image support. A Group component allows developers to stack multiple avatars with automatic overlap and an overflow badge that calculates and displays surplus counts without manual configuration. The same API surface and behavior is available across all three supported frameworks, aiming to eliminate repetitive boilerplate code in WASM application development.

0
ProgrammingDEV Community ·

How offloading UI calculations to background threads fixed a real-time trading app freeze

A mobile developer at a trading firm encountered severe UI freezes during peak hours after expanding real-time WebSocket data from 10 to up to 137 price levels per stock. The app received around 30 data packages per second, and seemingly minor operations like number formatting, color calculation, and localization overwhelmed the main thread at that volume. An initial attempt to fix performance using Diffable Data Source backfired, as the feature is optimized for partial updates — not full list replacements — making overhead worse. Profiling revealed the true bottleneck: computed properties being evaluated on the main thread for every update cycle. The fix involved moving all calculations to background threads during WebSocket response parsing, leaving the UI layer to simply display pre-computed values, which restored smooth scrolling under peak load.

0
ProgrammingDEV Community ·

Developer Builds Home Mini PC Setup to Log Meals, Tasks, and Projects via AI

A developer has set up a personal AI assistant on a home mini PC using OpenClaw, LifeOS, and n8n to manage daily tasks, health logs, and project tracking. The system allows the user to dictate notes in plain language, which the assistant converts into structured database entries stored in SQLite. A simple breakfast log — chicken breast, milk, and dragon fruit totalling roughly 450 kcal — was captured as the first record with a single voice command from a phone. The setup is designed to avoid the fragmentation of juggling multiple apps, with each script given a narrow, specific role such as capturing or editing records rather than broadly modifying files. The developer emphasises accuracy over convenience, preferring to preserve uncertainty in a record rather than allow the assistant to invent missing details.

0
ProgrammingDEV Community ·

Five Decades-Old EDI Principles That Modern API Developers Still Get Wrong

EDI, the legacy data exchange technology used by retail trading partners, solved distributed-systems problems that modern API developers continue to rediscover through costly production failures. Key lessons include embedding idempotency keys inside signed payloads rather than headers, and defining explicit deduplication windows to ensure true exactly-once message delivery. EDI's practice of per-partner implementation guidelines highlights why API integration tests must go beyond happy-path scenarios and include adversarial edge cases. The EDI functional acknowledgment model — where receipt and processing are confirmed separately and unacknowledged messages are actively investigated — offers a stronger reliability pattern than the common webhook approach of returning HTTP 200 and hoping for the best. Silent data truncation, a well-known hazard in fixed-width EDI formats, remains equally dangerous in modern JSON APIs where fields may be silently shortened without returning an error.

0
ProgrammingDEV Community ·

How to Resume an AI Agent's Blockchain Transaction Observation After a Timeout

When an AI agent submits a blockchain transaction and its client wait period expires, the original operation's tracking data can be lost if not properly stored. Developers using PriorSeal's TypeScript SDK can recover by persisting the transaction hash, chain ID, authorization ID, and observation job ID in durable storage before a timeout occurs. A sample Node.js script demonstrates how a restarted process can reconnect to an existing observation job and poll it for completion without resubmitting the transaction. The guide stresses that a timeout should never automatically trigger a new trade, as recovery workers are only responsible for monitoring the original operation. Developers are also warned that a completed observation job does not by itself confirm a transaction succeeded, and that receipts may require independent verification.

0
ProgrammingDEV Community ·

Security training teaches hacking, not fixing — and the data shows the cost

Most hands-on cybersecurity platforms, including PortSwigger, Hack The Box, and TryHackMe, mark exercises complete once an exploit succeeds, with no requirement to understand or implement a fix. This offensive-first design was built for penetration testers but is now the primary training path for developers, students, and career changers whose actual job is to prevent attacks. A 2024 OpenSSF survey found nearly one-third of development professionals were unfamiliar with secure coding practices, with most relying on years of on-the-job experience to fill the gap. Secure Code Warrior's nine-year analysis found that developers trained in fix-oriented, secure-by-design methods introduced up to 53% fewer vulnerabilities, yet only around 4% of developers globally apply such practices. Meanwhile, Veracode and HackerOne data show security debt and unresolved vulnerability backlogs growing sharply, suggesting the industry is generating more findings than it can remediate.

0
ProgrammingDEV Community ·

Greenfinger 2.0 turns a single URL into a distributed, searchable web archive

Greenfinger 2.0 is an open-source, distributed web crawler built for the JVM that crawls an entire site from a single starting URL and stores every page, image, and version. It produces three output layers simultaneously: a raw file store, a full-text Lucene or Elasticsearch index, and a vector index supporting semantic and image-based search. The system requires no central coordinator or queue service — each node runs the same JAR and claims its own share of URLs, allowing nodes to join or leave mid-crawl without interruption. If the index or vector store needs rebuilding, it can be regenerated from the saved files without re-crawling the site. The project is available on GitHub and can be running in about 60 seconds via a provided CLI and optional Docker setup.

0
ProgrammingDEV Community ·

How to host a Discord bot 24/7 for free using your own home computer

Developers who run Discord bots often face the problem of keeping them online continuously without paying for cloud hosting. A home computer that stays powered on can serve as a zero-cost host, avoiding the idle timeouts and command losses common with free cloud tiers. Tools like 'screen' on macOS allow bots to keep running after a terminal is closed, while system-level managers such as launchd on macOS or systemd on Linux can automatically restart the bot after reboots. A recommended approach layers launchd over a shell script that monitors and relaunches a named screen session, with a network check added to prevent failed startups right after reboot. Beyond crash recovery, the guide also advises monitoring bot activity via timestamps to detect silent failures where the process is alive but no longer responding to commands.

0
ProgrammingDEV Community ·

Developer guide: SMS to Israel — number formats, Hebrew encoding and sender ID rules

Sending SMS to Israel requires careful handling of local mobile number formats, which use a 10-digit structure starting with 05 and must be converted to E.164 format (+972) for international systems. Not all 05x prefixes are Israeli mobile numbers — only 050–055 and 058 are valid, while 056 and 059 belong to Palestinian networks. Messages containing even a single Hebrew character, emoji, or special punctuation switch the entire message from GSM-7 to UCS-2 encoding, cutting per-segment capacity from 160 to 70 characters and raising costs. Scheduling must account for Israel's Friday–Saturday weekend, Shabbat observance, and the Asia/Jerusalem time zone, whose daylight saving dates differ from Europe and the US. Israeli law also mandates prior consent, sender identification, and an opt-out mechanism for marketing messages, and delivery reports should be actively monitored rather than treating 'accepted' status as confirmed delivery.

0
ProgrammingDEV Community ·

Developer builds private AI home assistant using MQTT to avoid open ports or VPNs

A developer wanted to query a home GPU-powered Ollama instance from their phone without exposing their network to the internet. Instead of the usual Docker, reverse proxy, and VPN setup, they used MQTT — a publish/subscribe messaging protocol — as a neutral meeting point between their phone and home PC. Neither the home machine nor the browser client accepts incoming internet connections; all communication is routed through a rented Linux server running a Mosquitto MQTT broker. The entire system spans roughly 1,000 lines of code across a static browser page, a lightweight PC service, and a Python plugin handling tokens and Ollama calls. The developer noted alternatives like Tailscale and Cloudflare Tunnel but preferred MQTT for its simplicity, device-agnostic access via URL, and reliance on broker-level authentication rather than a custom auth layer.

0
ProgrammingDEV Community ·

How to Automate Email Verification Testing in Playwright CI Pipelines

End-to-end testing of email verification flows presents a challenge when Playwright triggers a signup and must then retrieve and act on a verification email automatically. Using real inboxes like Gmail introduces complications around CI access, parallel test runs, and stale messages interfering with results. A cleaner approach involves generating unique test email addresses programmatically and routing them to a dedicated test inbox accessible via API. Once the verification email is received, tests can assert its content, extract the verification link or OTP, and complete the full user journey without any manual intervention. This method enables fully automated, unattended email verification testing in CI/CD pipelines.

0
ProgrammingDEV Community ·

Convolvger 0.5.0 lets you archive AI chats from ChatGPT, Claude, Gemini, and Grok locally

Convolvger, an open-source command-line tool, allows users to save AI conversations from major platforms as local Markdown and JSON files without requiring an account or sending telemetry. Version 0.5.0, the latest release, adds support for Grok alongside existing support for ChatGPT, Claude, and Gemini. The tool works around each platform's technical limitations — such as app-shell pages and browser-only restrictions — by querying the same API endpoints the web interfaces use or employing a bookmarklet approach. Archived files can be independently verified, and the tool accurately handles edge cases like deleted shares, withheld files, and inconsistent sender labels. Convolvger requires Python 3.12 or higher, is MIT licensed, and is available via pip, uv, or pipx.

0
ProgrammingDEV Community ·

Developer's Blockchain Reconciliation Tool Caught Five Bugs in Its Own Code First

A developer building an open-source tool called onchain-tieout — designed to verify whether a wallet's reconstructed transaction history matches the balance reported on-chain — discovered the first errors it flagged were in the tool itself. A wrong assumption about Etherscan's pagination limit caused silent data truncation, while a single block containing over 1,000 token transfers exposed a flaw in the cursor logic. Separately, HTTP 429 rate-limit responses were being misclassified as unreadable token contracts, masking network errors as data facts. Two additional bugs were found through manual code review rather than testing, both involving ambiguous inputs being silently converted into plausible but incorrect outputs. When fully corrected and run against vitalik.eth, the tool processed 10,476 balance rows, with 8,281 tying out exactly — most discrepancies traced to airdropped spam contracts.

0
ProgrammingDEV Community ·

**Building Vision Assistant: A Custom Desktop AI Tool Built with Electron**

This is a submission for the MLH x DEV Writing Challenge I built Vision Assistant v1.0.0, a custom desktop AI vision tool created from scratch using Electron. What it does: It brings instant, system-wide AI assistance directly to your desktop environment without the friction of constant context-switching. It features global shortcut activation (Ctrl + Shift + Space), multi-screen capture capabilities, real-time chat & vision analysis, and memory persistence across sessions. The Inspiration: I wanted to eliminate the workflow friction of switching between browser tabs and separate tools when an

← NewerPage 872 of 3176Older →