🛠️ Hacker News Tools

[Other] Show HN: Git for LLMs – a context management interface Hi HN, we’re Jamie and Matti, co-founders of Twigg.<p>During our master’s we continually found the same pain points cropping up when using LLMs. The linear nature of typical LLMs interfaces - like ChatGPT and Claude - made it really easy to get lost without any easy way to visualise or navigate your project.<p>Worst of all, none of them are well suited for long term projects. We found ourselves spending days using the same chat, only for it to eventually break. Transferring context from one chat to another is also cumbersome. We decided to build something more intuitive to the ways humans think.<p>We started with two simple ideas. Enabling chat branching for exploring tangents, and an interactive tree diagram to allow for easy visualisation and navigation of your project.<p>Twigg has developed into an interface for context management - like “Git for LLMs”. We believe the input to a model - or the context - is fundamental to its performance. To extract the maximum potential of an LLM, we believe the users need complete control over exactly what context is provided to the model, which you can do using simple features like cut, copy and delete to manipulate your tree.<p>Through Twigg, you can access a variety of LLMs from all the major providers, like ChatGPT, Gemini, Claude, and Grok. Aside from a standard tiered subscription model (free, plus, pro), we also offer a Bring Your Own Key (BYOK) service, where you can plug and play with your own API keys.<p>Our target audience are technical users who use LLMs for large projects on a regular basis. If this sounds like you, please try out Twigg, you can sign up for free at <a href="https:&#x2F;&#x2F;twigg.ai&#x2F;" rel="nofollow">https:&#x2F;&#x2F;twigg.ai&#x2F;</a>. We would love to get your feedback!

[Other] Show HN: Nostr Web – decentralized website hosting on Nostr We built Nostr Web, a new way to publish and host websites that live entirely on the Nostr network instead of centralized servers.<p>Each website is a collection of signed, verifiable Nostr events distributed across relays—so it can’t be taken down, censored, or lost.<p>It includes: • DNS TXT records for domain-based discovery (_nweb.domain.com) • CLI publisher tool for versioned deployments (nw-publisher) • Browser extension (nw-extension) for native browsing experience • Relay v1.3.5 support for Nostr Web event kinds<p>Try the live demo: <a href="https:&#x2F;&#x2F;nweb.shugur.com" rel="nofollow">https:&#x2F;&#x2F;nweb.shugur.com</a><p>Repos: <a href="https:&#x2F;&#x2F;github.com&#x2F;Shugur-Network&#x2F;relay" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;Shugur-Network&#x2F;relay</a> | <a href="https:&#x2F;&#x2F;github.com&#x2F;Shugur-Network&#x2F;nw-nips" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;Shugur-Network&#x2F;nw-nips</a> | <a href="https:&#x2F;&#x2F;github.com&#x2F;Shugur-Network&#x2F;nw-publisher" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;Shugur-Network&#x2F;nw-publisher</a> | <a href="https:&#x2F;&#x2F;github.com&#x2F;Shugur-Network&#x2F;nw-extention" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;Shugur-Network&#x2F;nw-extention</a><p>Would love feedback from the HN community—on protocol design, relay performance, or UX ideas for improving decentralized web publishing.

[Other] Show HN: Deta Surf – An open source and local-first AI notebook Hi HN!<p>We got frustrated with the fragmented experience of exploring &amp; creating across our file manager, the web and document apps. Lots of manual searching, opening windows &amp; tabs, scrolling, and ultimately copying &amp; pasting into a document editor.<p>Surf is a desktop app meant for simultaneous research and thinking to minimize the grunt work. It’s made of two parts:<p>1) A multi-media library where you can save and organize files and webpages into collections called Notebooks.<p>2) A LLM-powered smart document which you can auto-generate using the context from any stored page, tab or entire notebook. This document contains deep links back to the source material — like a page of a PDF or timestamp in a YouTube video. Unlike Deep Research products (or NotebookLMs chat) the entire thing is editable. The user also stays in the loop.<p>With a technology like AI, context &#x2F; data is proving to be king. We think it should stay under the user’s control, with minimal lock in: where you can own &amp; export, and plug &amp; play with different models. That’s why Surf is:<p>- Open Source on GitHub - Open (&amp; Local Data): the data saved in Surf is stored on your local machine in open and accessible formats and mostly works offline. - Open Model Choice: you can choose which models you use with Surf, and can add custom &amp; Local LLMs<p>Early users include students &amp; researchers who are learning and doing thematic research using Surf.<p>Github repo: <a href="https:&#x2F;&#x2F;github.com&#x2F;deta&#x2F;surf&#x2F;" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;deta&#x2F;surf&#x2F;</a><p>Website: <a href="https:&#x2F;&#x2F;deta.surf&#x2F;" rel="nofollow">https:&#x2F;&#x2F;deta.surf&#x2F;</a>

[Other] Show HN: Subway Surfers in Your Terminal Tired of losing focus when waiting for codegen to finish? Now you can enhance your concentration by integrating subway surfers into your workflow.<p>brew tap evanreilly&#x2F;subway-surfers brew install subway-surfers Usage subway-surfers

[Database] Show HN: SerenDB – A Neon PostgreSQL fork optimized for AI agent workloads Show HN: SerenDB – Neon PostgreSQL fork optimized for AI agent workloads<p>We forked Neon to make database operations faster and safer for AI agents. The goal is to enable instant experimentation with production data and catch prompt injection attacks before they hit your DB. The open-source repo is at <a href="https:&#x2F;&#x2F;github.com&#x2F;serenorg&#x2F;serendb" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;serenorg&#x2F;serendb</a><p>The coolest current features are:<p>1. Time-travel queries: Query your database as it existed at any timestamp. SELECT * FROM orders AS OF TIMESTAMP &#x27;2024-01-15 14:30:00&#x27;. Essential for debugging agent decisions and auditing what data an agent saw.<p>2. Scale-To-Zero with pgvector: Built-in vector embeddings that sleep when idle. Pay nothing for dormant agent databases, auto-scale to 16 vCPU when needed.<p>The coolest features in development are:<p>1. Prompt injection detection: Fingerprinting and context-aware policies to catch injection attempts before they reach your data. We&#x27;re extending Postgres&#x27;s security model to understand AI-specific attack patterns.<p>2. 100ms branch creation: Clone your entire production database in 100ms (vs Neon&#x27;s 500ms). Enables branch-per-agent patterns and instant rollback. Great for faster testing of multiple prompt variations on real data.<p>This is early - we&#x27;re working on the hosted service now.<p>Technical folks: curious if anyone else is hitting the &quot;how do I safely test my agent on prod data&quot; problem. Happy to answer questions about our updates to the branching architecture or our proposed context security approaches.<p>Website: <a href="https:&#x2F;&#x2F;serendb.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;serendb.com&#x2F;</a>

[Other] I built MindMaps for Linux and Git cmdz with quiz, typing game and cheatsheet

[Other] Show HN: Create interactive diagrams with pop-up content This is a recent addition to Vexlio which I think the HN crowd may find interesting or useful.<p>TL;DR: easy creation of interactive diagrams, meaning diagrams that have mouse click&#x2F;hover hooks that you can use to display pop-up content. The end result can be shared with a no-sign-in-required web link.<p>My thought is that this is useful for system docs, onboarding or user guides, presentations, etc. Anything where there is a high-level view that should remain uncluttered + important metadata or details that still need to be available somewhere.<p>You can try it out without signing up for anything, just launch the app here (<a href="https:&#x2F;&#x2F;app.vexlio.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;app.vexlio.com&#x2F;</a>), create a shape, select it with the main pointer tool and then click &quot;Add popup&quot; on the context toolbar.<p>I&#x27;d be grateful for any and all feedback!

[Database] Show HN: Timeplus Proton 3.0 – First vectorized streaming SQL engine Two years after open sourcing Proton, we&#x27;re releasing v3.0 which brings enterprise-grade streaming capabilities to the open source version: full connectivity, processing, and routing in a single binary with zero dependencies.<p>Key features:<p>First vectorized streaming SQL engine in modern C++ with JIT compilation<p>High-throughput, low-latency, high-cardinality processing End-to-end streaming: ETL, joins, aggregation, alerts, and tasks<p>Native connectors: Kafka, Redpanda, Pulsar, ClickHouse, Splunk, Elastic, MongoDB, S3, Iceberg<p>Native Python UDF&#x2F;UDAF support to support your AI&#x2F;ML work loads<p>The same performance we&#x27;ve proven in large enterprise deployments is now available in the community edition.<p>Would love feedback from anyone working with streaming data or looking for Flink&#x2F;ksqlDB alternatives.

[Build/Deploy] SourceFS: A 2h+ Android build becomes a 15m task with a virtual filesystem

[Other] Show HN: Run any GitHub Action locally from your Cron job -- finally!

[Other] Show HN: LunaRoute – a high-performance local proxy for AI coding assistants LunaRoute is a high-performance local proxy for AI coding assistants like Claude Code, OpenAI Codex CLI, and OpenCode. Get complete visibility into every LLM interaction with zero-overhead passthrough, comprehensive session recording, and powerful debugging capabilities.<p>- See Everything Your AI Does - get full logs (JSONL), summary of sessions including tokens used (input&#x2F;output) as well as tools usage and success rates.<p>- Privacy &amp; Compliance Built-In - redact or tokenize any sensitive information (regex based).<p>- Speaks OpenAI and Anthropic dialects so you can route (and translate) when needed between models and providers.<p>- High performance - passthrough is 0.1ms - 0.2ms latency. Logging and summary is off loaded to a secondary thread to allow maximum performance.<p>Feedback is always appreciated as well as stars on the repo :)

[Database] Show HN: GoSMig – minimal, type-safe SQL migrations written in Go I built GoSMig for my own projects and open-sourced it in case it helps others. It’s a tiny generic library (no external deps except golang.org&#x2F;x&#x2F;term) for writing SQL migrations in Go with compile-time checks.<p>It supports transactional and non-transactional migrations, rollback, status, version, and a small CLI handler so you can ship your own migration binary.<p>Why another migrator?<p>- Minimal API, no DSL or file layout to learn<p>- Type-safe via Go generics<p>- Works with database&#x2F;sql and sqlx out of the box<p>- Should work with any db library (or wrapper) that implements some generic interfaces (see the &quot;Core Types&quot; section here <a href="https:&#x2F;&#x2F;github.com&#x2F;padurean&#x2F;gosmig?tab=readme-ov-file#core-types" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;padurean&#x2F;gosmig?tab=readme-ov-file#core-t...</a>)<p>- Tested with PostgreSQL, should work with any SQL RDBMS (MySQL, SQLite, MS SQL Server, ...)<p>Repo: <a href="https:&#x2F;&#x2F;github.com&#x2F;padurean&#x2F;gosmig" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;padurean&#x2F;gosmig</a><p>Docs &amp; examples: README + examples branch <a href="https:&#x2F;&#x2F;github.com&#x2F;padurean&#x2F;gosmig&#x2F;tree&#x2F;examples" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;padurean&#x2F;gosmig&#x2F;tree&#x2F;examples</a><p>Would love feedback: ergonomics, missing guardrails, API rough edges, and real-world gotchas, etc.

[Other] Show HN: ExprTk REPL – Explore math expressions in the browser with WebAssembly ExprTk compiled to WebAssembly lets you explore and evaluate math expressions instantly in your browser. Everything runs client-side at near-native speed.

[Other] Build your own database

[CLI Tool] Show HN: Clink – Bring your own CLI Agents, Ship instantly Clink lets you use the coding agents you already pay for (Claude Code, Codex CLI, Gemini CLI, Z.ai GLM) to build → live-preview → ship apps in an isolated container.<p>No token purchases, no extra cost for coding. Just link your existing Claude&#x2F;OpenAI&#x2F;Gemini account and start building and deploying instantly.<p>Why we built this:<p>Claude Code is our go-to for coding, but it lacked preview + deploy capabilities. We didn&#x27;t want to pay Lovable again just for that.<p>Different agents excel at different tasks - Claude Code for versatility, Codex for complex work, GLM for speed. We needed one platform to leverage them all.<p>CLI agents offer more freedom than traditional web builders. We wanted to unlock their full potential with proper dev tooling.<p>What it does:<p>• Prompt → Build → Live → Deploy - The fastest path from idea to live website. Deploy for free.<p>• BYO Subscription - Use your existing plans efficiently (Claude Code $20 = 10x Lovable $25 usage, GLM $3 = 3x Claude Code $20)<p>DEV Mode (Beta):<p>• Multi-stack support - Build with Node, Python, Go, Rust and deploy containers to public URLs instantly<p>• Repo imports - Upgrade and deploy your existing projects across any stack<p>Links:<p>• Clink: <a href="https:&#x2F;&#x2F;clink.new" rel="nofollow">https:&#x2F;&#x2F;clink.new</a><p>• OSS origin (Claudable, ~2.8k): <a href="https:&#x2F;&#x2F;github.com&#x2F;opactorai&#x2F;Claudable" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;opactorai&#x2F;Claudable</a><p>We&#x27;d love any feedback, bug reports, or stack requests - we iterate fast and read every comment.

[DevOps] Show HN: Katakate – Dozens of VMs per node for safe code exec I&#x27;ve built this to make it easy to host your own infra for lightweight VMs at large scale.<p>Intended for exec of AI-generated code, for CICD runners, or for off-chain AI DApps. Mainly to avoid Docker-in-Docker dangers and mess.<p>Super easy to use with CLI &#x2F; Python SDK, friendly to AI engs who usually don&#x27;t like to mess with VM orchestration and networking too much.<p>Defense-in-depth philosophy.<p>Would love to get feedback (and contributors: clear &amp; exciting roadmap!), thx

[Package Manager] Show HN: Interactive timelines from Markdown – Chronos Timeline Make time make sense. Create and share beautiful interactive timelines from plain text. Also available as an Obsidian plugin.<p>Developers can render Chronos timelines in their apps with chronos-timeline-md library on NPM

[API/SDK] Show HN: Apicat – A Lightweight Offline Postman Alternative Apicat is the ultimate offline Postman alternative that stores your .http files locally. It’s Git-friendly, open-source, and highly compatible with Postman. Test APIs offline with this powerful free offline API client designed for developers who need a reliable local API testing tool.

[Other] Show HN: Django Keel – 10 Years of Django Best Practices in One Template After a decade of shipping Django to production, I got tired of solving the same setup problems on every new project.<p>Environment-first settings. Sensible auth defaults. Structured logging. CI from day zero. Pre-commit hooks. Docker. Security hardening. Every project meant two days of boilerplate before writing business logic.<p>So I built Django Keel: a production-ready Django starter that eliminates the yak-shaving. GitHub: <a href="https:&#x2F;&#x2F;github.com&#x2F;CuriousLearner&#x2F;django-keel" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;CuriousLearner&#x2F;django-keel</a><p>*What you get*:<p>- 12-factor config with environment-based secrets - Production-hardened security defaults - Pre-wired linting, formatting, testing, pre-commit hooks - CI workflow ready to go - Clear project structure that scales - Documentation with real trade-offs explained<p>*Background*:<p>I maintained a popular cookiecutter template for years. Django Keel is what that should&#x27;ve been from the start—battle-tested patterns without the accumulated cruft.<p>*Who it&#x27;s for*:<p>Teams and solo builders shipping Django to production who want a strong baseline without tech debt. Feedback welcome on what works, what doesn&#x27;t, and what&#x27;s missing. Issues and PRs appreciated.

[Other] Show HN: I'm rewriting a web server written in Rust for speed and ease of use Hello! I got quite some feedback on a web server I&#x27;m building, so I&#x27;m rewriting the server to be faster and easier to use.<p>I (and maybe some other contributors?) have optimized the web server performance, especially for static file serving and reverse proxying (the last use case I optimized for very recently).<p>I also picked a different configuration format and specification, what I believe is easier to write.<p>Automatic TLS is also enabled by default out of the box, you don&#x27;t need to even enable it manually, like it was in the original server I was building.<p>Yesterday, I released the first release candidate of my web server&#x27;s rewrite. I&#x27;m so excited for this. I have even seen some serving websites with the rewritten web server, even if the rewrite was in beta.<p>Any feedback is welcome!