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Why your GitHub Actions CI is slow (and how to speed it up)

Two days ago GitHub emailed me to say one of my workflows had failed. The next day it emailed me again. I saw it, told myself I would fix it tomorrow, and promptly forgot. It was my nightly database backup, quietly broken the whole time, and I only caught it because a failure-rate number nudged up. A failed run at least gets you an email. A slow run gets you nothing. GitHub never pings you when CI quietly takes twice as long, runs the whole suite twice per PR, or rebuilds dependencies from scratch every time. That waste compounds where no one looks. Here are the usual culprits, each with the exact fix. When I scanned 35 popular open-source repos, not one had a fully clean config. 32 of 35 had no concurrency control, 33 of 35 had no job timeouts, and 22 of 35 ran the full suite twice on every PR. If projects this polished leave minutes on the table, the rest of us definitely do. Your suite runs twice on every PR Trigger a workflow on both push and pull_request and, for a branch in the same repo, opening a PR fires both. You just paid for two identical runs. This one is pure waste and it can roughly halve your PR-related minutes. Trigger on pull_request , and keep push for your default branch: on : push : branches : [ main ] pull_request : Old runs don't cancel when you push again Push a fix 30 seconds after the first push and, with no concurrency group, both runs go to completion. The first is dead weight, and it is holding a slot in your queue while it finishes. This hides even when you do have a group: astro has a concurrency group on one workflow but left off cancel-in-progress , which our scan estimates leaves roughly 1,850 minutes a month on the table. Add a group keyed on the branch, with cancel-in-progress , so a new push supersedes the old run: concurrency : group : ${{ github.workflow }}-${{ github.ref }} cancel-in-progress : true Every run reinstalls dependencies from scratch No cache means every run re-downloads and rebuilds your dependencies. On a typical

2026-06-30 原文 →
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Galfus Script MVP is complete

Galfus Script has reached its first MVP milestone. Galfus is an experimental programming language written in Rust, designed around a typed VM-first execution model, compact .gfb artifacts, deterministic module/workspace resolution, and an ownership model based on anchors, edges, and weak observers. The MVP goal was not to build a full ecosystem yet. The goal was to prove the complete local execution pipeline: txt .gfs source -> lexer and parser -> resolver -> type checker and semantic analyzer -> ownership check -> MIR lowering -> bytecode emitter -> Galfus Module Image -> .gfb serialization -> VM interpreter execution https://github.com/vulppi-dev/galfus-script/discussions/10

2026-06-29 原文 →
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I built a zero-dependency TypeScript env validator

Every Node.js developer has been burned by this at least once: const port = parseInt ( process . env . PORT ); // NaN if PORT is missing const db = process . env . DATABASE_URL ; // string | undefined — not safe! Your app starts fine locally, then crashes in production because someone forgot to set an env var. The error shows up 3 hours later, not at startup. The solution I built @harmand66/typesafe-env — a tiny, zero-dependency library that validates and types your environment variables at boot time. import { createEnv } from ' @harmand66/typesafe-env ' ; const env = createEnv ({ PORT : { type : ' number ' , default : 3000 }, DATABASE_URL : { type : ' string ' , required : true }, DEBUG : { type : ' boolean ' , default : false }, }); // ✅ TypeScript knows PORT is a number env . PORT + 1 // 3001 — not "30001" env . DATABASE_URL // string — guaranteed, never undefined If anything is missing or wrong, your app fails immediately at startup with a clear message: All errors at once — no more fixing them one by one. Why not Zod? Zod is great but it's 57kb and requires a lot of boilerplate for this specific use case. @harmand66/typesafe-env is zero dependencies and does one thing well. Try it npm install @harmand66/typesafe-env GitHub: https://github.com/giannielloemmanuele-lgtm/typesafe-env npm: https://www.npmjs.com/package/@harmand66/typesafe-env Would love any feedback or contributions! 🙏

2026-06-29 原文 →
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Introducing UIAble — A Free, Open-Source UI Library

Today, we’re excited to launch UIAble v1.0, an open-source component library built for developers, by developers. We explored a lot of UI libraries built on Shadcn. Most of them feel nearly identical — same structure, same aesthetic, same tradeoffs. That’s what pushed us to build something different. Not another library that looks like Shadcn with a coat of paint, but a design system with its own identity and a clearer sense of what it’s actually for. Why UIAble exists After enough frontend projects, one thing becomes obvious: the same UI patterns get rebuilt again and again. Inputs. Dialogs. Tables. Alerts. Dropdowns. OTP fields. Form validation states. Not because they’re hard to build, but because most existing libraries never quite fit real project requirements. Some are too opinionated. Some pile on unnecessary abstraction. Some become rigid after initial setup. And some make simple UI unnecessarily complicated. That friction is what led to UIAble. Not to launch another oversized library, just to build a cleaner, more practical foundation for modern frontend development. What UIAble actually is UIAble is a free, open-source UI component library built with Tailwind CSS , Shadcn-style architecture , and Base UI principles . The idea is straightforward: reusable components should stay flexible, readable, and easy to maintain. Instead of pulling projects into a rigid ecosystem, UIAble gives you components you can copy directly into your codebase, edit freely, and scale without fighting the library. No lock-in. No unnecessary abstraction. No dependency trap. What makes it different in practice A few things actually matter here. You get the code. UIAble doesn’t hide logic behind layers of packaging. You see the component. You edit it. You ship it. That alone changes how teams work with UI. It’s built for real product UI, not showcase pages. A lot of UI kits look great in demos and fall apart in production. UIAble focuses on the unglamorous stuff, forms that don’t bre

2026-06-29 原文 →
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