🛠️ All DevTools

[Other] Show HN: 48-digit prime numbers every git commit

[DevOps] 🤖 A minimal and customizable Docker image running the Android emulator as a service.

[Code Quality] Graph-based code intelligence that understands your codebase CodeGraph is an open-source code intelligence system that transforms your code into a queryable graph database. Instead of parsing files on-the-fly, it indexes your codebase into structured relationships—classes, functions, dependencies, all connected and searchable in milliseconds. Perfect for powering AI assistants, building smarter code editors, or analyzing large codebases at scale. Start with Python. Expand to any language. Own your data. No vendor lock-in.

[IDE/Editor] WebAssembly runtime for Python, Lua, Ruby and etc. This is a WebAssembly-based online code editor that allows you to run languages like Python, Lua, and Ruby online. You can run code and validate ideas anytime, anywhere, on any device, and generate shareable links for readers to view the results. The code runs directly in the browser, so there are no network delays other than the initial loading of WASM resources, resulting in instant output. It's secure, efficient, and environmentally friendly.

[IDE/Editor] All-in-one developer toolkit Most tools today focus on one part of a developer’s workflow — Notion for notes, Excalidraw for diagrams, Apple Notes for quick thoughts, Todoist for tasks, and various sticky-note or planning apps. Because of this, developers constantly switch between 5–7 different apps while working. DevBench is different because it brings all these pieces into one unified workspace built specifically for developers.

[IDE/Editor] Browser Real-time Artificial Intelligence Debugger, BRAID Unlock the power of advanced AI browser debugging directly in your IDE. In real-time your web development experience will be stream lined with immediate solutions. No more hassle of looking up, copying, and pasting errors and code snippets. BRAID handles all this for you, saving time and development costs.

[Database] Native, lightweight SQL client. Goodbye Electron bloat. Mergen is a next-generation, open-source SQL client built with Go and Wails. Unlike traditional tools wrapped in heavy Electron shells, Mergen utilizes the native system webview to deliver a blazing-fast experience with a tiny memory footprint (~20MB). Why Mergen? ⚡ Native Performance: Starts instantly, zero lag. 📉 Minimal Resources: Uses 90% less RAM than DataGrip or DBeaver. 🔒 Secure & Local: Built-in SSH Tunneling. No cloud sync—your data stays yours.

[Other] Show HN: Video to JPG – Extract frames in browser with blur detection

[DevOps] Show HN: Enroll, a tool to reverse-engineer servers into Ansible config mgmt Happy new year folks!<p>This tool was born out of a situation where I had &#x27;inherited&#x27; a bunch of servers that were not under any form of config management. Oh, the horror...<p>Enroll &#x27;harvests&#x27; system information such as what packages are installed, what services are running, what files have &#x27;differed&#x27; from their out-of-the-box defaults, and what other custom snowflake data might exist.<p>The harvest state data can be kept as its own sort of SBOM, but also can be converted in a mere second or two into fully-functional Ansible roles&#x2F;playbooks&#x2F;inventory.<p>It can be run remotely over SSH or locally on the machine. Debian and Redhat-like systems are supported.<p>There is also a &#x27;diff&#x27; mode to detect drift over time. (Years ago I used Puppet instead of Ansible and miss the agent&#x2F;server model where it would check in and re-align to the expected state, in case people were being silly and side-stepping the config management altogether). For now, diff mode doesn&#x27;t &#x27;enforce&#x27; but is just capable of notification (webhook, email, stdout) if changes occur.<p>Since making the tool, I&#x27;ve found that it&#x27;s even useful for systems where you <i>already</i> have in Ansible, in that it can detect stuff you forgot to put into Ansible in the first place. I&#x27;m now starting to use it as a &#x27;DR strategy&#x27; of sorts: still favoring my normal Ansible roles day-to-day (they are more bespoke and easier to read), but running enroll with &#x27;--dangerous --sops&#x27; in the background periodically as a &#x27;dragnet&#x27; catch-all, just in case I ever need it.<p>Bonus: it also can use my other tool JinjaTurtle, which converts native config files into Jinja2 templates &#x2F; Ansible vars. That one too was born out of frustration, converting a massive TOML file into Ansible :)<p>Anyway, hope it&#x27;s useful to someone other than me! The website has some demos and more documentation. Have fun every(any)-one.

[Other] Zero-Code Instrumentation of an Envoy TCP Proxy Using eBPF

[Other] Claude wrote a functional NES emulator using my engine's API

[Other] Torch.ts – building PyTorch in TypeScript from scratch to learn

[IDE/Editor] Small utilities that speed up daily dev work All.4.One combines a note editor, code editor, and pin system in one macOS app. Features 4 independent note spaces, code formatting/minification (7 languages), HTML preview, dynamic variables (IP, dates). All in one unified experience for developers.

[Other] Show HN: Use Claude Code to Query 600 GB Indexes over Hacker News, ArXiv, etc. Paste in my prompt to Claude Code with an embedded API key for accessing my public readonly SQL+vector database, and you have a state-of-the-art research tool over Hacker News, arXiv, LessWrong, and dozens of other high-quality public commons sites. Claude whips up the monster SQL queries that safely run on my machine, to answer your most nuanced questions.<p>There&#x27;s also an Alerts functionality, where you can just ask Claude to submit a SQL query as an alert, and you&#x27;ll be emailed when the ultra nuanced criteria is met (and the output changes). Like I want to know when somebody posts about &quot;estrogen&quot; in a psychoactive context, or enough biology metaphors when talking about building infrastructure.<p>Currently have embedded: posts: 1.4M &#x2F; 4.6M comments: 15.6M &#x2F; 38M That&#x27;s with Voyage-3.5-lite. And you can do amazing compositional vector search, like search @FTX_crisis - (@guilt_tone - @guilt_topic) to find writing that was about the FTX crisis and distinctly without guilty tones, but that can mention &quot;guilt&quot;.<p>I can embed everything and all the other sources for cheap, I just literally don&#x27;t have the money.

[Database] Show HN: 22 GB of Hacker News in SQLite Community, All the HN belong to you. This is an archive of hacker news that fits in your browser. When I made HN Made of Primes I realized I could probably do this offline sqlite&#x2F;wasm thing with the whole GBs of archive. The whole dataset. So I tried it, and this is it. Have Hacker News on your device.<p>Go to this repo (<a href="https:&#x2F;&#x2F;github.com&#x2F;DOSAYGO-STUDIO&#x2F;HackerBook" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;DOSAYGO-STUDIO&#x2F;HackerBook</a>): you can download it. Big Query -&gt; ETL -&gt; npx serve docs - that&#x27;s it. 20 years of HN arguments and beauty, can be yours forever. So they&#x27;ll never die. Ever. It&#x27;s the unkillable static archive of HN and it&#x27;s your hands. That&#x27;s my Year End gift to you all. Thank you for a wonderful year, have happy and wonderful 2026. make something of it.

[DevOps] Show HN: MCP Mesh – one endpoint for all your MCP servers (OSS self-hosted) Hey HN! I’m Gui from deco (decocms.com). We’ve been using this tool internally as the foundation for a few customer AI platforms, and today we’re open-sourcing it as MCP Mesh.<p>MCP is quickly becoming the standard for agentic systems, but… once you go past a couple servers it turns into the same problems for every team:<p>- M×N config sprawl (every client wired to every server, each with its own JSON + ports + retries) - Token + tool bloat (dumping tool definitions into every prompt doesn’t scale) - Credentials + blast radius (tokens scattered across clients, hard to audit, hard to revoke) - No single place to debug (latency, errors, “what tool did it call, with what params?”)<p>MCP Mesh sits between MCP clients and MCP servers and collapses that mess into one production endpoint you can actually operate.<p>What it does:<p>- One endpoint for Cursor &#x2F; Claude &#x2F; VS Code &#x2F; custom agents → all MCP traffic routes through the mesh - RBAC + policies + audit trails at the control plane (multi-tenant org&#x2F;workspace&#x2F;project scoping) - Full observability with OpenTelemetry (traces, errors, latency, cost attribution) - Runtime strategies as “gateways” to deal with tool bloat: Full-context (small toolsets), Smart selection (narrow toolset before execution), Code execution (load tools on-demand &#x2F; run code in a sandbox) - Token vault + OAuth support, proxying remote servers without spraying secrets into every client - MCP Apps + Bindings so apps can target capability contracts and you can swap MCP providers without rewriting everything<p>A small but surprisingly useful thing: the UI shows every call, input&#x2F;output, who ran it, and lets you replay calls. This ended up being our “Wireshark for MCP” during real workflows.<p>It’s open-source + self-hosted (run locally with SQLite; Postgres or Supabase for prod).<p>You can start with `npx @decocms&#x2F;mesh` or clone + run with Bun.<p>We’d love your feedback!<p>Links below:<p>Repo: <a href="https:&#x2F;&#x2F;github.com&#x2F;decocms&#x2F;mesh" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;decocms&#x2F;mesh</a><p>Landing: <a href="https:&#x2F;&#x2F;www.decocms.com&#x2F;mcp-mesh" rel="nofollow">https:&#x2F;&#x2F;www.decocms.com&#x2F;mcp-mesh</a><p>Blog post: <a href="https:&#x2F;&#x2F;www.decocms.com&#x2F;blog&#x2F;post&#x2F;mcp-mesh" rel="nofollow">https:&#x2F;&#x2F;www.decocms.com&#x2F;blog&#x2F;post&#x2F;mcp-mesh</a><p>edit: layout

[API/SDK] HTML to PDF API with 70+ Handlebars helpers Fileloom is a PDF generation API built for developers. Send HTML or use templates with Handlebars syntax, get a PDF back in under 2 seconds. No more font rendering issues on Linux servers. No complex setup. 70+ built-in helpers for currency, dates, loops, and conditionals. Store PDFs on our infrastructure or yours (S3, Supabase). Webhooks for pdf.generated and pdf.failed events. Free: 200 PDFs/month, no credit card required.

[Other] Premium 3D Icons for Designers & Developers Discover a vast collection of the best premium 3D icons for designers and developers. Ready to use and easy to integrate.

[Other] Share Your IDE Setup with the World Sync and share your VS Code, Cursor, or any IDE setup with the developer community. One-click backup of extensions, themes, and settings.

[Other] Charm Ruby – Glamorous Terminal Libraries for Ruby