🛠️ Hacker News Tools

[Other] GT – Experimental multiplexing tensor framework for distributed GPU computing

[Database] CLI to manage your SQL database schemas and migrations

[Other] Writing an Asciidoc Parser in Rust: Asciidocr

[Code Quality] Show HN: Duper – The Format That's Super An MIT-licensed human-friendly extension of JSON with quality-of-life improvements (comments, trailing commas, unquoted keys), extra types (tuples, bytes, raw strings), and semantic identifiers (think type annotations).<p>Built in Rust, with bindings for Python and WebAssembly, as well as syntax highlighting in VSCode. I made it for those like me who hand-edit JSONs and want a breath of fresh air.<p>It&#x27;s at a good enough point that I felt like sharing it, but there&#x27;s still plenty I wanna work on! Namely, I want to add (real) Node support, make a proper LSP with auto-formatting, and get it out there before I start thinking about stabilization.

[Testing] Show HN: KeyLeak Detector – Scan websites for exposed API keys and secrets I built this after seeing multiple teams accidentally ship API keys in their frontend code.<p>The problem: Modern web development moves fast. You&#x27;re vibe-coding, shipping features, and suddenly your AWS keys are sitting in a &lt;script&gt; tag visible to anyone who opens DevTools. I&#x27;ve personally witnessed this happen to at least 3-4 production apps in the past year alone.<p>KeyLeak Detector runs through your site (headless browser + network interception) and checks for 50+ types of leaked secrets: AWS&#x2F;Google keys, Stripe tokens, database connection strings, LLM API keys (OpenAI, Claude, etc.), JWT tokens, and more.<p>It&#x27;s not perfect, there are false positives but it&#x27;s caught real issues in my own projects. Think of it as a quick sanity check before you ship.<p>Use case: Run it on staging before deploying, or audit your existing sites. Takes ~30 seconds per page.<p>MIT licensed, for authorized testing only.<p><a href="https:&#x2F;&#x2F;github.com&#x2F;Amal-David&#x2F;keyleak-detector" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;Amal-David&#x2F;keyleak-detector</a>

[Other] Show HN: Micro-RLE ≤264-byte compression for UART/MCU logs, zero RAM growth I needed to stuff twice the telemetry through the same 115 kbaud line on a Cortex-M0+ that only had 8 kB flash left.<p>Micro-RLE is the smallest drop-in I could come up with: 264 B of Thumb code, 36 B of state, no malloc, worst-case 14 cycles&#x2F;byte and still lossless for every 8-bit pattern.<p>On the usual sensor streams (ADC, IMU, GPS) it’s 33-70 % smaller than raw output and boots in &lt; 600 µs, so you can fire-and-forget from main() before the PLL even locks.<p>Repo is a single .c file and a 3-function API—replace the weak emit() hook with your UART &#x2F; DMA &#x2F; ring-buffer and you’re done.<p>Size proof: arm-none-eabi-size micro_rle.o text data bss 264 0 36<p>MIT licensed, link in the repo. Happy to hear where else this fits!

[Database] Show HN: UnisonDB – Log-native KV database that replicates like a message bus Hi HN,<p>For the past few months, I’ve been building UnisonDB — a log-native database where the Write-Ahead Log (WAL) is the database, not just a recovery mechanism.<p>I started this because every time I needed data to flow — from core to edge, or between datacenters — I ended up gluing together a KV database + CDC + Kafka.<p>It worked, but it always felt like overkill: too many moving parts for even small workloads, and too little determinism.<p>What is it?<p>UnisonDB unifies storage and streaming into a single log-based core. Every write is: • Durable (appended to the WAL), • Ordered (globally sequenced for safety), • Streamable (available to any follower in real time).<p>It combines B+Tree storage (predictable reads, no LSM compaction storms) with WAL-based replication (sub-second fan-out to 100+ nodes).<p>Key Ideas<p>1. Storage + Streaming = One System — no CDC, no Kafka, no sidecar pipelines<p>2. B+Tree-Backed — predictable reads, zero compaction overhead<p>3. Multi-Model — KV, wide-column, and large objects (LOB) in one atomic transaction<p>4. Replication-Native — WAL streams via gRPC; followers tail in real time<p>5. Reactive by Design — every write emits a ZeroMQ notification<p>6. Edge-Friendly — replicas can go offline and resync instantly<p>Performance &amp; Tradeoffs 1. Write throughput is lower than pure LSM stores (e.g. BadgerDB) — because writes are globally ordered for replication safety. Deliberate tradeoff: consistency &gt; raw write speed.<p>2. Still ~2× faster than BoltDB with replication enabled.<p>Tech Details<p>Written in Go<p>FlatBuffers for zero-copy serialization<p>gRPC for streaming replication<p>GitHub: <a href="https:&#x2F;&#x2F;github.com&#x2F;ankur-anand&#x2F;unisondb" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;ankur-anand&#x2F;unisondb</a>

[Other] Claude Code Can Debug Low-Level Cryptography

[Other] WebAssembly (WASM) arch support for the Linux kernel Demos at: <a href="https:&#x2F;&#x2F;joelseverin.github.io&#x2F;linux-wasm&#x2F;" rel="nofollow">https:&#x2F;&#x2F;joelseverin.github.io&#x2F;linux-wasm&#x2F;</a>

[Other] Show HN: I built a self-hosted error tracker in Rails This project is inspired by 37signals’ ONCE idea. I replicated the whole process and have already sold a few copies (the testimonials are real).

[API/SDK] Show HN: Paykit – one SDK for Stripe, PayPal, Paddle (stop reading 5 API docs)

[Other] x86 architecture 1 byte opcodes

[Other] Use DuckDB-WASM to query TB of data in browser

[Other] Show HN: Loopletter: Open-source email marketing platform Hi, I started building Loopletter, an open-source email marketing platform built specifically for independent artists and creators. I&#x27;ve been using this for a while to run marketing campaigns for my own company. But due to the lack of time to update it i&#x27;ve decided to open it up under the MIT license so other people and industries can self-host, extend, or just learn from the codebase.<p><pre><code> What’s inside: - Full campaign builder (visual editor, reusable templates, optional Spotify-powered layouts) - Audience management tooling (imports, segmentation, consent workflows, list cleanup) - Queue-driven sending with AWS SES, BullMQ, and Redis — handles rate limits, retries, and deliverability feedback - Analytics dashboards with real-time metrics, campaign history, and basic attribution - Infrastructure scripts for Supabase, AWS EventBridge&#x2F;Lambda, and Upstash Redis so you can set everything up from scratch Tech stack: Next.js, React 19, TypeScript, Tailwind, Clerk for auth, Supabase (Postgres) for storage, AWS SES + S3 for mail&#x2F;asset delivery. The repo has docs, scripts, and a demo data sandbox because we know email platforms can be boring to set up without real content. Why open-source? Most tools in this space are either huge enterprise SaaS products or very marketing&#x2F;sales oriented. Independent artists have different needs (merch drops, tour announcements, limited release windows) and usually lean on social platforms they don’t control. Email still converts best for them, but standing up a full stack is painful. We’d love to see small labels, agencies, and indie devs fork it, run it for their communities, or contribute features. I&#x27;m especially curious if this has potential to be something bigger. Repo link: https:&#x2F;&#x2F;github.com&#x2F;createdbymax&#x2F;Loopletter-Open-source-email-marketing-platform Production website: https:&#x2F;&#x2F;loopletter.co&#x2F; Happy to answer questions about the project, SES deliverability, or anything else related to running email at indie scale. Thanks for taking a look!</code></pre>

[Other] Debug like a boss: 10 debugging hacks for developers, quality engineers, testers

[Other] Show HN: I build a cheap Skype Clone I build a skype clone, where you can make international calls via browser.<p>Skype was my go to app for that, but since they shut it down, decided to build my own. Its perfect for calling international customer support, or any other gov numbers.<p>Its pay-as-you-go - so no subscription charges, very transparent pricing. You can just top up $5 and see pricing in real time during the call.

[Other] Git CLI tool for intelligently creating branch names

[Other] Perfetto: Swiss army knife for Linux client tracing

[Other] DynGen – Run dynamic scripts on a SuperCollider server

[Other] Show HN: IRCd in Pure Bash In <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=45755788">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=45755788</a> there was mention of an IRC server using gawk, but no code. So I wrote an IRCd in pure bash.