🛠️ All DevTools

[Other] Langjam-Gamejam Devlog: Making a language, compiler, VM and 5 games in 52 hours

[Other] Using Vectorize to build an unreasonably good search engine in 160 lines of code

[API/SDK] Show HN: HN Sentiment API – I ranked tech CEOs by how much you hate them I built an API that extracts entities from Hacker News comments and classifies sentiment towards them as positive, negative, or neutral. It also classifies overall comment sentiment and assigns each entity a label (person, location, date, technology, organization, other).<p>505k+ comments, Oct 31 - Present.<p>Here&#x27;s the leaderboard:<p>LOVED:<p>- Steve Jobs: 44% positive, 7% negative<p>- Linus Torvalds: 43% positive, 5% negative<p>- Gabe Newell: 34% positive, 8% negative<p>MID:<p>- Bill Gates: 22% positive, 8% negative<p>- Tim Cook: 15% positive, 30% negative<p>- Bezos: 12% positive, 18% negative<p>HATED:<p>- Zuckerberg: 4% positive, 35% negative<p>- Sam Altman: 8% positive, 38% negative<p>- Musk: 5% positive, 45% negative<p>Try it yourself:<p># Who does HN talk about the most?<p>curl &quot;<a href="https:&#x2F;&#x2F;api.hnpulse.com&#x2F;entities?label=person&amp;sort=mentions" rel="nofollow">https:&#x2F;&#x2F;api.hnpulse.com&#x2F;entities?label=person&amp;sort=mentions</a>&quot;<p># What are people saying about remote work?<p>curl &quot;<a href="https:&#x2F;&#x2F;api.hnpulse.com&#x2F;comments?entity=remote" rel="nofollow">https:&#x2F;&#x2F;api.hnpulse.com&#x2F;comments?entity=remote</a> work&amp;limit=3&quot;<p># Is OpenAI&#x27;s reputation getting worse?<p>curl &quot;<a href="https:&#x2F;&#x2F;api.hnpulse.com&#x2F;trends?entity=openai&amp;bucket=day" rel="nofollow">https:&#x2F;&#x2F;api.hnpulse.com&#x2F;trends?entity=openai&amp;bucket=day</a>&quot;<p># What technology gets mentioned alongside SF?<p>curl &quot;<a href="https:&#x2F;&#x2F;api.hnpulse.com&#x2F;entities?co-occur=SF&amp;label=technology&amp;sort=mentions" rel="nofollow">https:&#x2F;&#x2F;api.hnpulse.com&#x2F;entities?co-occur=SF&amp;label=technolog...</a>&quot;<p>Stack: Go, PostgreSQL, GPT-4o mini for entity extraction<p>Docs: <a href="https:&#x2F;&#x2F;docs.hnpulse.com" rel="nofollow">https:&#x2F;&#x2F;docs.hnpulse.com</a> API: <a href="https:&#x2F;&#x2F;api.hnpulse.com" rel="nofollow">https:&#x2F;&#x2F;api.hnpulse.com</a>

[Other] Show HN: RenderCV – Open-source CV/resume generator, YAML → PDF I built RenderCV because Word kept breaking my layout and LaTeX was overkill. I wanted my CV as a single YAML file (content, design, margins, everything) that I could render with one command.<p>Run <i>rendercv render cv.yaml</i> → get a perfectly typeset PDF.<p>Highlights:<p>1. <i>Version-controllable:</i> Your CV is just text. Diff it, tag it.<p>2. <i>LLM-friendly:</i> Paste into ChatGPT, tailor to a job description, paste back, render. Batch-produce variants with terminal AI agents.<p>3. <i>Perfect typography:</i> Typst under the hood handles pixel-perfect alignment and spacing.<p>4. <i>Full design control:</i> Margins, fonts, colors, and more; tweak everything in YAML.<p>5. <i>Comes with JSON Schema:</i> Autocompletion and inline docs in your editor.<p>Battle-tested for 2+ years, thousands of users, 120k+ total PyPI downloads, 100% test coverage, actively maintained.<p>GitHub: <a href="https:&#x2F;&#x2F;github.com&#x2F;rendercv&#x2F;rendercv" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;rendercv&#x2F;rendercv</a><p>Docs: <a href="https:&#x2F;&#x2F;docs.rendercv.com" rel="nofollow">https:&#x2F;&#x2F;docs.rendercv.com</a><p>Overview on RenderCV&#x27;s software design (Pydantic + Jinja2 + Typst): <a href="https:&#x2F;&#x2F;docs.rendercv.com&#x2F;developer_guide&#x2F;understanding_rendercv&#x2F;" rel="nofollow">https:&#x2F;&#x2F;docs.rendercv.com&#x2F;developer_guide&#x2F;understanding_rend...</a><p>I also wrote up the internals as an educational resource on maintaining Python projects (GitHub Actions, packaging, Docker, JSON Schema, deploying docs, etc.): <a href="https:&#x2F;&#x2F;docs.rendercv.com&#x2F;developer_guide&#x2F;" rel="nofollow">https:&#x2F;&#x2F;docs.rendercv.com&#x2F;developer_guide&#x2F;</a>

[Build/Deploy] Show HN: Mushak – Zero config zero downtime Docker/Compose to server deployment

[API/SDK] Reachy Mini's SDK

[Other] User profiles and long-term memory for your AI agents Self-hosted and open-source user profiles and long-term memory for your AI agents. Unlike generic memory solutions that store blobs of text, GetProfile extracts natural language summary, typed traits with confidence scores and relevant memories with importance levels into a structured user profiles stored in your own PostgreSQL database.

[Other] A curated list of JS/TS ready-to-use array filters A curated list of ready-to-use (functional programming) array filter functions in JavaScript and TypeScript (TS / ESM / CJS). fp-filters allows you to stop rewriting the same code over and over again and greatly improves readability. So that you will probably never write another filter function 🚀! fp-filters functions are designed API-first and leveraging high-order predicates are super easy to use and to combine.

[IDE/Editor] Real-time dependency health monitoring for vs code Monitor dependency health, detect vulnerabilities, track outdated packages, and ensure license compliance directly in VS Code. Free, open-source, and works offline.

[IDE/Editor] Extension that notifies you when PRs need your attention GitHub notifications don't work for busy developers. This extension puts review requests and your open PRs in your browser toolbar where you'll actually see them. Badge shows review count | PR count. Completed reviews auto-remove. 100% open source. Setup takes 60 seconds. Perfect if you're juggling multiple repos and tired of missing review requests or losing track of your PRs.

[Other] I wrote a code editor in C and now I'm a changed man

[Other] Comptime – C# meta-programming with compile-time code generation and evaluation

[Monitoring/Observability] Show HN: Cerberus – Real-time network monitor with eBPF Hi HN! I&#x27;m Mo, a platform engineer at Deltaflare working on critical infrastructure protection.<p>I built Cerberus because traditional packet capture tools (tcpdump, Wireshark) have too much overhead for production CNI environments. eBPF lets us filter and classify packets at the kernel level with near-zero performance impact.<p>Some interesting challenges: - eBPF verifier is <i>strict</i> - every memory access needs bounds checking - Limited to 32 bytes of L7 payload (tradeoff between inspection depth and overhead) - TC vs XDP decision (chose TC for compatibility)<p>Looking for contributors, especially on: - Redis backend for distributed deployments - Prometheus metrics export - Anomaly detection<p>Happy to answer questions!

[Other] A GPT-empowered penetration testing tool

[Database] Show HN: Dbzero – Code as if you have infinite RAM (Python persistence engine)

[Other] Convert hex to tailwind v4 colors Convert any hex color to the closest Tailwind CSS class using the CIEDE2000 (ΔE00) perceptual color difference algorithm. Supports the Tailwind v4 OKLCH palette. Free and unlimited.

[Other] Next Js and Prisma Visulizer Code Eye is a personal tool that visualizes large Next.js codebases to make architecture easy to understand. It maps routes, file dependencies, and reverse dependencies, and generates clear ER diagrams if your Next.js project uses Prisma. It works with local projects and GitHub repositories. Useful for: onboarding into large codebases, safe refactoring, impact analysis, debugging, and understanding complex system architecture at a glance.

[Other] Build Your Own React

[DevOps] Show HN: Netrinos – A keep it simple Mesh VPN for small teams I&#x27;m the founder at Netrinos. I built a WireGuard-based mesh VPN because remote access has always been a pain. After years of SSH tunnels, IPsec headaches, and the ssh log horror movie, I wanted something simpler: install, sign in, get work done.<p>Netrinos creates a LAN-like overlay network across your devices. Connections are direct P2P via WireGuard, with no central server routing traffic. Each device gets a stable IP and DNS name (pc.you.netrinos.com). When direct connections fail, they fall back to a relay server that&#x27;s still encrypted end-to-end. We can&#x27;t see your traffic.<p>The most challenging problem to solve was NAT traversal. UDP hole punching works most of the time. The rest is a cocktail of symmetric NAT, CGNAT, and serial NATs. We use STUN-style discovery and relay fallback for the edge cases. I was surprised by how unreliable low-end ISP routers really are, and how much technical wizardry it takes to hide that behind a clean, simple UX.<p>Our stack is a Go backend for client and server, WireGuard kernel mode for Linux and Windows (macOS is userspace), Wails.io for cross-platform UI. WireGuard does all the heavy lifting. Go ties it all together.<p>Popular use cases include: RDP to home PCs, accessing NAS without exposing it, and SSH into headless Linux boxes. One customer manages hundreds of IoT devices in the field, eliminating the need to deal with customer routers.<p>We just released Pro with multi-user, access control, and remote gateway routing. Personal is free (up to 100 devices).<p>I&#x27;d love to hear what you expect from a simple mesh VPN, what&#x27;s missing from current tools, and what&#x27;s lacking from your remote access setup. Use code HNPRO26 for a 30-day trial of Pro.<p><a href="https:&#x2F;&#x2F;netrinos.com" rel="nofollow">https:&#x2F;&#x2F;netrinos.com</a>

[API/SDK] An open-source, code-first Typescript toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control.