🛠️ All DevTools

[Other] Show HN: I built an IDE for devs who live in the terminal

[Code Quality] Legacy-Mess Detector – assess the “legacy-mess level” of your code and output a beautiful report | 屎山代码检测器，评估代码的“屎山等级”并输出美观的报告

[Other] Show HN: Resrap – A Parser but in Reverse I built Resrap, a Go package that takes a grammar in ABNF format and generates infinitely long sequences of syntactically correct code...either completely randomly or with seeds for a deterministic generation.<p>ABNF is a modified version of EBNF(<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Extended_Backus%E2%80%93Naur_form" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Extended_Backus%E2%80%93Naur_f...</a>) I made for this project, basically means you can specify when generating code 20% of lines will be if{} blocks and 50% will be while{} blocks which allows for more natural code generation, plus support for infinite generation of code.<p>It’s very fast...it generated ~40 million tokens of C syntax in about 26 seconds on my laptop and supports multithreading which actually saw boosts in performance since its very easy to parallelize.<p>I originally made this for a typing-test project (I didn’t want to store code snippets manually), but it turned out to be useful in other contexts too, like: - Stress-testing parsers and linters - Creating non-copyrighted “lorem ipsum” code for tech demos - Generating those endless “hacker” code scenes you see in movies<p>Curious what other cool things people might do with it!<p>Github: <a href="https:&#x2F;&#x2F;github.com&#x2F;osdc&#x2F;Resrap" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;osdc&#x2F;Resrap</a> Website: <a href="https:&#x2F;&#x2F;resrap.osdc.dev&#x2F;" rel="nofollow">https:&#x2F;&#x2F;resrap.osdc.dev&#x2F;</a>

[Other] Show HN: Neural Emotion Matrix for NPCs Hey! I built this system to humanize NPCs by giving them emotions using Rust and ML.<p>The system provides emotion coordinates (based on Russell&#x27;s circumplex model) from text input or actions, with persistent emotional memory per entity. Think NPCs that remember how they feel about specific players or events.<p>I pre-trained a DistilBERT model on ~1k video game dialogues (Skyrim, Cyberpunk, etc.) and plan to extract and evaluate 100k+ dialogues soon. However studio&#x2F;team can manually add dialogues to enrich their own dataset.<p>The matrix doesn&#x27;t generate dialogue, it only analyzes content. When you pass text or an action, it returns emotion coordinates on the valence (pleasant&#x2F;unpleasant) and arousal(energetic&#x2F;calm) scale. For example:<p>- [0.00, 0.00] = neutral<p>- [0.29, 0.80] = excited<p>- [-0.50, -0.30] = sad&#x2F;tired<p>I made a quick visualizer here to help understand <a href="https:&#x2F;&#x2F;valence-arousal-visualizer.vercel.app&#x2F;" rel="nofollow">https:&#x2F;&#x2F;valence-arousal-visualizer.vercel.app&#x2F;</a><p>The system helps select which dialogue&#x2F;action to play based on emotional state:<p>- Player says something bad to NPC → system detects negative valence → game picks from &quot;angry dialogue pool&quot;<p>- NPC remembers past positive interactions → system returns positive valence → friendlier responses available<p>So, the devs still write the dialogues or choose the next actions, but the matrix helps manage NPC emotional states and memory dynamically.<p>Here&#x27;s the project structure to better understand how it works:<p>- src&#x2F;config: Helper utilities for NPC configuration setup<p>- src&#x2F;module: The core engine with emotion prediction, memory storage, and entity management<p>- src&#x2F;api: FFI layer with pub extern &quot;C&quot; to bridge our modules with C&#x2F;C++ game engines and modding tools (Unity, Unreal, etc.)<p>To implement it, just call `build.sh`, it will create DLL files that you can use to call the matrix functions directly in C++&#x2F;C&#x2F;C#.<p>I&#x27;d love feedback on code quality and overall architecture.<p>Feel free to be honest about the good, the bad, and the ugly. PRs welcome if you want to contribute!

[Other] Dbos: Durable Workflow Orchestration with Go and PostgreSQL

[Package Manager] PyOCI – Publish and install private Python packages using OCI/Docker registries

[Other] Optimizing a 6502 image decoder, from 70 minutes to 1 minute

[API/SDK] Run, build & ship local AI in minutes Nexa SDK runs any model on any device, across any backend locally—text, vision, audio, speech, or image generation—on NPU, GPU, or CPU. It supports Qualcomm and Apple NPUs, GGUF, Apple MLX, and the latest SOTA models (Gemma3n, PaddleOCR).

[API/SDK] Instant Docs and SDKs for your API Start with an API spec. Generate SDKs in multiple languages and interactive API documentation tailored to your brand.

[Database] Get your database software prototypes fast A multi platform framework with prototyping and database capabilities. It includes code generators and UML ex/import. The main software itself is a prototype including it's UML model you could look at using BoUML.

[Other] Private todos - capture quickly, focus on what matters now. Todos.now is a privacy-first todo-list dashboard. Type natural language to add tasks (“Launch Todos.now #sideproject 9/29@8am !high”), fly with keyboard shortcuts, switch between List/Kanban/Priority views, and keep data private with end-to-end encryption.

[API/SDK] Twilio made SMS APIs complicated. We've made it 5-min simple Send SMS at scale with the developer—friendly API. Simple integration, predictable pricing, and optimized for modern applications.

[Other] From idea to startup — name, domain & dev prompt in 10s Generate unique brand names with domains, colors, and logo ideas using AI

[Other] Better YouTube Analytics NewStudio is a Chrome Extension built to further enhance and customize YouTube Studio. Currently launching with 4 features: - Confirm-click Sign-out - Real-time engaged views - Customizable dashboard - Live subscriber count

[Other] Simple Table: Power Up Your React Grid, Flat Price! Simple Table is a 16 kB React data grid with cell selection, row grouping, infinite scroll, etc., offering flat monthly/yearly pricing instead of per-engineer fees.

[Other] Show HN: Free developer-first OneNote alternative Hey Everyone, been working on a note-taking app called janta (Just Another Note Taking App) the past few months.<p>You can try it out at app.janta.dev (you will be redirected to app.janta.dev&#x2F;canvas&#x2F;temporary, which is the locally-stored whiteboard you can access)<p>I felt limited with OneNote, Excalidraw, and other infinite-canvas style apps, so I built an alternative. You have access to code-editors, Desmos graphs, and rich text editors (SlateJS). This is because the canvas is designed in a way that allows web components to exist on the same layer as pen-strokes, so you can annotate code, circle points-of-inflection, and programmatically generate graphs using matplotlib.pyplot!<p>This is a beta release, and feedback would be awesome!

[Other] Coding a new BASIC interpreter in 2025 to replace a slow one

[Other] Show HN: Built an MCP server using Cloudflare's Code Mode pattern Read this article by Cloudflare this morning <a href="https:&#x2F;&#x2F;blog.cloudflare.com&#x2F;code-mode&#x2F;" rel="nofollow">https:&#x2F;&#x2F;blog.cloudflare.com&#x2F;code-mode&#x2F;</a> the main argument being that LLMs are much better at writing typescript code than tool calls because they&#x27;ve seen typescript code many more times.<p>HN Discussion: <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=45399204">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=45399204</a> <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=45386248">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=45386248</a><p>Deno provides a great sandbox environment for Typescript code execution because of its permissions system which made it easy to spin up code that only has access to fetch and network calls.<p>Stick an MCP proxy on top of that and you&#x27;ve got &quot;CodeMode&quot; (code intermixed with MCP tool calls) for more advanced workflow orchestration.<p><a href="https:&#x2F;&#x2F;github.com&#x2F;jx-codes&#x2F;codemode-mcp" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;jx-codes&#x2F;codemode-mcp</a><p>There&#x27;s a lot of things that can be improved here. Like a virtual file system for the agent to actually build up its solution instead of being forced to one shot the solution but the bones are there.

[Other] Show HN: Toolbrew – Free little tools without signups or ads I got tired of fighting through spammy tool sites just to do something simple, so I made Toolbrew in a few hours on Replit. Just a bunch of free little tools in one place. Text converters, SEO checks, video downloaders, that kind of stuff. No signups, no ads.<p>If there is a tool you wish existed, you can request it on the site and I will build it. Do your worst. Seriously, ANY tool.<p>Maybe it helps, maybe not. Enjoy!

[Other] Metasploit Framework