CodeFlag

What it does

AI writes the code now. Now your job is to flag the issues. Train the most important developer skill of the AI era with interactive code review challenges.

AI writes the code. You flag the issues. Train the most important developer skill of the AI era with interactive code review challenges.

AI writes the code now. Companies are hiring engineers who can catch dangerous anti-patterns. Practice spotting real bugs in code segments and simulated PRs and level up! Review Python scripts, TypeScript components, C++ programs, SQL queries, Dockerfiles, GitHub Actions workflows, HTML markup, rendered UIs, and Git commands. Catch injection vulnerabilities, memory leaks, CI/CD misconfigurations, and unhandled edge cases across 5 categories. Free challenges included, no account needed. Upgrade to unlock all 100+ questions. Code review is the highest-leverage skill in the AI era. Start training itfrom codeflag.io

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  Code Snippets AI2023 · ▲230

  Generate, refactor & debug with GPT-4. All inside VSCode

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  AI Code Creator2023 · krater.ai · ▲80

  Create new or fix existing code w/ AI

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  CoableAI - Code Writing & Debugging2023 · codableai.com · ▲77

  CodableAI can help write, modify and debug code instantly

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  SteerhausJul 2026 · steerhaus.dev · ▲6

  The LeetCode for the AI era

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  AI Code - Axofy2025 · ▲12

  Next-Gen AI Code

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  GPTeach US-AI Pitching You Coding Tasks2024 · ▲5

  Code Typing (is) Fun,Get your 10000h and land your dream job

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  /dev/null▲484

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  Dev tools · 3d ago · dev-null.sh

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  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 28d ago · github.com

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  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 26d ago · github.com

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  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 23d ago · openbot.run

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  Talanoa▲346

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 21d ago · talanoa.email

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  CoreSpeed▲332

  One MCP for everything your agents need: apps, memory, tools

  Dev tools · 28d ago · corespeed.io

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  Rork Max▲1,428

  Best AI for iOS apps. Website that replaces Xcode

  Life & fun · Feb 2026 · rork.com

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  happycapy▲1,365

  The agent-native computer, for the rest of us

  AI · Feb 2026 · happycapy.ai

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  SuperX▲897

  All-in-one growth OS for serious 𝕏 creators

  AI · Feb 2026 · superx.so

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  KiloClaw▲868

  Hosted OpenClaw. No Mac mini required.

  Dev tools · Feb 2026 · kilo.ai

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  Lovon AI Therapy▲801

  Feel closer and have more fun with your partner every day!

  AI · Feb 2026 · lovon.app

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  I spent 3 years reverse-engineering a 40 yo stock market sim from 1986▲721

  Hello my name is Ben Ward for the past 3 years I have been remastering the financial game Wall Street Raider created by Michael Jenkins originally on DOS in 1986. It has been a rough journey but I finally see the light at the end of the tunnel. I just recently redid the website and thought maybe the full story of how this project came to be would interest you all. Thank you for reading.

  Work · Feb 2026 · wallstreetraider.com