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Show HN: A Replacement for Shortcutfoo
想提升操作效率？这个开源项目让你在5秒倒计时内挑战常用快捷键，覆盖tmux、iTerm2、VS Code等工具。
Article URL: https://github.com/ijidak/shortcut-practice Comments URL: https://news.ycombinator.com/item?id=49349510 Points: 1 # Comments: 0
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Gesture Synth School
用手势演奏音乐，零基础也能学的创意练习应用，重新定义乐器学习方式。
A practice app for learning to play music with your hands. Discussion | Link
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Show HN: PromptTrace – Free hands-on labs to practice hacking LLMs
免费实操平台，手把手教你玩转LLM提示注入攻击与防御
Article URL: https://prompttrace.airedlab.com Comments URL: https://news.ycombinator.com/item?id=49077514 Points: 3 # Comments: 0
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Show HN: Openleetcode – LeetCode runner where tests live in the repo
在本地运行 LeetCode 题目的开源 CLI 工具，测试用例随仓库管理，支持 Python、C++、Rust 等 8 种语言，目前已覆盖约 1000 道题。
You write a standard solution, just like on LeetCode, and run it through the CLI. It identifies the problem by ID or title, executes your code against…
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AI Girlfriend vs. Real Therapy: The Real Difference
用AI角色进行结构化情感练习，而非简单虚拟伴侣，帮你提升情感表达与社交自信的试验性工具
Article URL: https://chatbrat.ai/bratlog/ai-girlfriend-vs-therapy-emotional-practice Comments URL: https://news.ycombinator.com/item?id=48852034 Point…
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Show HN: Fenzo AI – Interactive Micro-courses on any topic
用 AI 给你造一个较真老板，60 秒开始职场对话微课，练到回答不再模糊。
Article URL: https://fenzo.ai/ Comments URL: https://news.ycombinator.com/item?id=48821776 Points: 3 # Comments: 0
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Has AI Changed the Joy of Building?
AI加速了编码，却可能偷走你成长的挣扎——重拾构建乐趣的反思。
Lately I've been thinking a lot about how AI is changing the way I learn to code. It helps me solve problems faster, but sometimes I wonder if I'm giv…
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Code Challenge of the Day — Count two-sum pairs (medium)
在浏览器里直接挑战两数之和配对计数，即时判题还能保持每日打卡，刷题党别错过。
Picks up where Two-sum indices left off. Same setup as two-sum, but count how many index pairs (i<j) sum to target. Write count_pairs(nums, target)…
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How to learn iraqi arabic (2020 pre AI)
一份面向自学者的伊拉克阿拉伯语实用指南，从零基础到日常交流的清晰路径。
Article URL: https://medium.com/@xavierbisits/how-to-learn-iraqi-arabic-bd468eff29e5 Comments URL: https://news.ycombinator.com/item?id=48606040 Point…
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Show HN: Chatty Lingo – A language practicing app
用AI教练陪你练习真实场景口语，支持多语言，24/7耐心陪练，还能与母语者聊天。
Hey all, I've built a web app for practicing spoken conversations in a language you're learning. It was driven by my own needs when I learn Korean. Th…
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Show HN: Bit Flip – Daily Coding Questions
每天一道精心编程题，15分钟练出问题解决真功夫
Hello everyone, I'm introducing Bit Flip, a newsletter where you get coding questions and interview questions asked by tech companies delivered to you…
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Open-source real company briefs to practice AI-native building and get hired
开源真实公司简报，练习AI原生项目还能获得社区点评，求职利器
Article URL: https://github.com/ai-native-builder/ai-portfolio-projects Comments URL: https://news.ycombinator.com/item?id=48370657 Points: 1 # Commen…
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Show HN: Offline Typing Mastery
离线打字练习神器：用真实语料训练，可视化回放和习惯日历让你快速提升。
I built this typing mastery application yesterday. It took just few hours. I wanted to have features that I wanted to use for improving the typing spe…
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搜狐张朝阳：AI 时代科普应注重原理和推导，过度依赖 AI 易致“思维萎缩”
免费在线学习平台，通过视频讲解和互动练习帮助你深入理解数学与科学原理，避免被动接收信息导致的思维萎缩
IT之家 5 月 19 日消息，2026 搜狐科技年度论坛于 5 月 17 日在北京举办，搜狐创始人、董事局主席兼首席执行官、物理学博士张朝阳带来了一堂主题为《从 Rindler 时空来理解等效原理》的进阶物理课。 据新浪科技消息，谈及 AI 对科普领域的影响时，张朝阳直言，“AI 技术为基础科学的…