Show HN: Rewriting Mongosh in Golang Using Claude https://ift.tt/UkxS7ch

Show HN: Rewriting Mongosh in Golang Using Claude https://ift.tt/AGOQcwa March 11, 2026 at 10:55PM

Show HN: Loquix – Open-source Web Components for AI chat interfaces https://ift.tt/gnL3FsA

Show HN: Loquix – Open-source Web Components for AI chat interfaces https://ift.tt/Ajhfv3M March 11, 2026 at 10:19PM

Show HN: StreamHouse – Open-source Kafka alternative https://ift.tt/Y9hptqR

Show HN: StreamHouse – Open-source Kafka alternative Hey HN, I built StreamHouse, an open-source streaming platform that replaces Kafka's broker-managed storage with direct S3 writes. The goal: same semantics, fraction of the cost. How it works: Producers batch and compress records, a stateless server manages partition routing and metadata (SQLite for dev, PostgreSQL for prod), and segments land directly in S3. Consumers read from S3 with a local segment cache. No broker disks to manage, no replication factor to tune — S3 gives you 11 nines of durability out of the box. What's there today: - Producer API with batching, LZ4 compression, and offset tracking (62K records/sec) - Consumer API with consumer groups, auto-commit, and multi-partition fanout (30K+ records/sec) - Kafka-compatible protocol (works with existing Kafka clients) - REST API, gRPC API, CLI, and a web UI - Docker Compose setup for trying it locally in 5 minutes What's not there yet: - Battle-tested production deployments (I'm the only user so far) - Connectors for consumers to immediately connect to (i.e clickhouse, elastic search etc) The cost model is what motivated this. Kafka's storage costs scale with replication factor × retention × volume. With S3 at $0.023/GB/month, storing a TB of events costs ~$23/month instead of hundreds on broker EBS volumes. Written in Rust, 15 crates thus far. Apache 2.0 licensed. GitHub: https://ift.tt/hu5IGb6 How it works blog on my main website: https://ift.tt/whu02k3 Happy to answer questions about the architecture, tradeoffs, or what I learned building this. https://ift.tt/hu5IGb6 March 11, 2026 at 09:14PM

Show HN: I built an ISP infrastructure emulator from scratch with a custom vBNG https://ift.tt/RKbmUQr

Show HN: I built an ISP infrastructure emulator from scratch with a custom vBNG Demo: https://ift.tt/espNjWG GitHub: https://ift.tt/eJzhcuU Aether is a multi-BNG (Broadband Network Gateway) ISP infrastructure lab built almost from scratch that emulates IPoE IPv4 subscriber management end-to-end. It supports IPoE/Ipv4 networks and runs a python-based vBNG with RADIUS AAA, per-subscriber traffic shaping, and traffic simulation emulated on Containerlab. It is also my first personal networking project, built roughly over a month. Motivations behind the project I'm a CS sophomore. About three years ago, I was assigned, as an intern, to build a OSS/BSS platform for a regional ISP by myself without mentoring. Referencing demo.splynx.com , I developed most of the BSS side ( bookkeeping, accounting, inventory management ), but, in terms of networking, I managed to install and setup RADIUS and that was about it. I didn't have anyone to mentor me or ask questions to, so I had given up then. Three years later, I decided to try cracking it again. This project is meant to serve as a learning reference for anyone who's been in that same position i.e staring at closed-source vendor stacks without proper guidance. This is absolutely not production-grade, but I hope it gives someone a place to start. Architecture overview The core component, the BNG, runs on an event-driven architecture where state changes are passed around as messages to avoid handling mutexes and locks. The session manager is the sole owner of the session state. To keep it clean and predictable, the direBNG never accepts external inputctly. The one exception is the Go RADIUS CoA daemon, which passes CoA messages in via IPC sockets. Everything the BNG produces(events, session snapshots) gets pushed to Redis Streams, where the bng-ingestor picks them up, processes them, and persists them. Simulation and meta-configs I am generating traffic through a simulator node that mounts the host's docker socket and runs docker exec commands on selected hosts. The topology.yaml used by Containerlab to define the network topology grows bigger as more BNG's and access nodes are added. So aether.config.yaml, a simpler configuration, is consumed by the configuration pipeline to generate the topology.yaml and other files (nginx.conf, kea-dhcp.conf, RADIUS clients.conf etc.) Known Limitations - Multiple veth hops through the emulated topology add significant overhead. Profiling with iperf3 (-P 10 -t 10, 9500 MTU, 24 vCPUs) shows BNG→upstream at ~24 Gbit/s, but host→BNG→upstream drops to ~3.5 Gbit/s. The 9500 MTU also isn't representative of real ISP deployments. This gets worse when the actual network is reintroduced capping my throughput to 1.6 Gbits/sec in local. - The circuit ID format (1/0/X) is non-standard. I simplified it for clarity. - No iBGP or VLAN support. - No Ipv6 support. I wanted to target IPv4 networks from the start to avoid getting too much breadth without a lot of depth. Nearly everything I know about networking (except some sections from AWS) I learned building this. A lot was figured out on the fly, so engineers will likely spot questionable decisions in the codebase. I'd genuinely appreciate that feedback. Questions - Currently, the circuit where the user connects is arbitrarily decided by the demo user. In a real system with thousands of circuits, it'd be very difficult to properly assess which circuit the customer might connect to. When adding a new customer to a service, how does the operator decide, based on customer's location, which circuit to provide the service to ? https://ift.tt/KvfXZGD March 11, 2026 at 08:38PM

Show HN: Satellite imagery object detection using text prompts https://ift.tt/3jlR5gE

Show HN: Satellite imagery object detection using text prompts I built a browser-based tool for detecting objects in satellite imagery using vision-language models (VLMs). You draw a polygon on the map and enter a text prompt such as "swimming pools", "oil tanks", or "buses". The system scans the selected area tile-by-tile and returns detections projected back onto the map as GeoJSON. Pipeline: select area and zoom level, split the region into mercantile tiles, run each tile with the prompt through a VLM, convert predicted bounding boxes to geographic coordinates (WGS84), and render the results back on the map. It works reasonably well for distinct structures in a zero-shot setting. occluded objects are still better handled by specialized detectors like YOLO models. There is a public demo and no login required. I am mainly interested in feedback on detection quality, performance tradeoffs between VLMs and specialized detectors, and potential real-world use cases. https://ift.tt/qZ05e4N March 9, 2026 at 02:52PM

Show HN: Agentic Data Analysis with Claude Code https://ift.tt/xuydoig

Show HN: Agentic Data Analysis with Claude Code Hey HN, as a former data analyst, I’ve been tooling around trying to get agents to do my old job. The result is this system that gets you maybe 80% of the way there. I think this is a good data point for what the current frontier models are capable of and where they are still lacking (in this case — hypothesis generation and general data intuition). Some initial learnings: - Generating web app-based reports goes much better if there are explicit templates/pre-defined components for the model to use. - Claude can “heal” broken charts if you give it access to chart images and run a separate QA loop. Would either feedback from the community or to hear from others that have tried similar things! https://ift.tt/zvhU8OR March 10, 2026 at 11:44PM

Show HN: DenchClaw – Local CRM on Top of OpenClaw https://ift.tt/USBzH2n

Show HN: DenchClaw – Local CRM on Top of OpenClaw Hi everyone, I am Kumar, co-founder of Dench ( https://denchclaw.com ). We were part of YC S24, an agentic workflow company that previously worked with sales floors automating niche enterprise tasks such as outbound calling, legal intake, etc. Building consumer / power-user software always gave me more joy than FDEing into an enterprise. It did not give me joy to manually add AI tools to a cloud harness for every small new thing, at least not as much as completely local software that is open source and has all the powers of OpenClaw (I can now talk to my CRM on Telegram!). A week ago, we launched Ironclaw, an Open Source OpenClaw CRM Framework ( https://ift.tt/CQY50SB ) but people confused us with NearAI’s Ironclaw, so we changed our name to DenchClaw ( https://denchclaw.com ). OpenClaw today feels like early React: the primitive is incredibly powerful, but the patterns are still forming, and everyone is piecing together their own way to actually use it. What made React explode was the emergence of frameworks like Gatsby and Next.js that turned raw capability into something opinionated, repeatable, and easy to adopt. That is how we think about DenchClaw. We are trying to make it one of the clearest, most practical, and most complete ways to use OpenClaw in the real world. Demo: https://www.youtube.com/watch?v=pfACTbc3Bh4#t=43 npx denchclaw It has a CRM focus because we asked a couple dozen hard-core OpenClaw users "what do you actually do", and it was sales automation, lead enrichment, biz dev, creating slides, linkedin outreach, email/notion/calendar stuff, and it's always painful to set up. But I use DenchClaw daily for almost everything I do. It also works as a coding agent like Cursor - DenchClaw built DenchClaw. I am addicted now that I can ask it, “hey in the companies table only show me the ones who have more than 5 employees” and it updates it live than me having to manually add a filter. On Dench, everything sits in a file system, the table filters, views, column toggles, calendar/gantt views, etc, so OpenClaw can directly work with it using Dench’s CRM skill. The CRM is built on top of DuckDB, the smallest, most performant and at the same time also feature rich database we could find. Thank you DuckDB team! It creates a new OpenClaw profile called “dench”, and opens a new OpenClaw Gateway… that means you can run all your usual openclaw commands by just prefixing every command with `openclaw --profile dench` . It will start your gateway on port 19001 range. You will be able to access the DenchClaw frontend at localhost:3100. Once you open it on Safari, just add it to your Dock to use it as a PWA. Think of it as Cursor for your Mac (also works on Linux and Windows) which is based on OpenClaw. DenchClaw has a file tree view for you to use it as an elevated finder tool to do anything on your mac. I use it to create slides, do linkedin outreach using MY browser. DenchClaw finds your Chrome Profile and copies it fully into its own, so you won’t have to log in into all your websites again. DenchClaw sees what you see, does what you do. It’s an everything app, that sits locally on your mac. Just ask it “hey import my notion”, “hey import everything from my hubspot”, and it will literally go into your browser, export all objects and documents and put it in its own workspace that you can use. We would love you all to break it, stress test its CRM capabilities, how it streams subagents for lead enrichment, hook it into your Apollo, Gmail, Notion and everything there is. Looking forward to comments/feedback! https://ift.tt/bUdhegB March 9, 2026 at 09:55PM

Show HN: I gave my robot physical memory – it stopped repeating mistakes https://ift.tt/SZ82DRB

Show HN: I gave my robot physical memory – it stopped repeating mistakes https://ift.tt/FS9pKzn March 9, 2026 at 11:36PM

Show HN: Skir – A schema language I built after 15 years of Protobuf friction https://ift.tt/WLdg0tN

Show HN: Skir – A schema language I built after 15 years of Protobuf friction Why I built Skir: https://ift.tt/zdabGcW... Quick start: npx skir init All the config lives in one YML file. Website: https://skir.build GitHub: https://ift.tt/Z3cks4W Would love feedback especially from teams running mixed-language stacks. https://skir.build/ March 9, 2026 at 12:17AM

Show HN: Astro MD Editor – Schema-aware editor for Astro content collections https://ift.tt/w8HKWgL

Show HN: Astro MD Editor – Schema-aware editor for Astro content collections I built this for my own Astro projects where I got tired of hand-editing YAML frontmatter and switching between files. astro-md-editor reads your collection schemas and gives you a local editor UI with typed frontmatter controls (including image/color/icon pickers) alongside a markdown/MDX editor. Run it with: npx astro-md-editor Would love feedback on schema edge cases or missing field types. https://ift.tt/FAx2wuv March 8, 2026 at 11:44PM

Show HN: I built a simple book tracker because I kept buying books I owned https://ift.tt/qHek8SK

Show HN: I built a simple book tracker because I kept buying books I owned I'm Maureen, a senior and self-taught developer. I love browsing second-hand book markets but kept coming home with books I already owned. I couldn't find a simple enough app to track my library — everything required an account, had ads, or pushed a subscription. So I built one myself. SeniorEase Library (Android): scan an ISBN, book is added instantly. No account, no ads, one-time €2.99. First 10 books free. Would love any feedback! https://ift.tt/D3Rt1yr March 8, 2026 at 11:17PM

Show HN: Agentcheck – Check what an AI agent can access before you run it https://ift.tt/5vrHETy

Show HN: Agentcheck – Check what an AI agent can access before you run it Hey HN! I've just open-sourced agentcheck, a fast, read-only CLI tool that scans your shell and reports what an AI agent could access: cloud IAM credentials, API keys, Kubernetes contexts, local tools, and more. Main features: - Broad coverage: scans AWS, GCP, Azure, 100+ API key environment variables and credential files, Kubernetes, Docker, SSH keys, Terraform configs, and .env files - Severity levels: every finding is tagged LOW, MODERATE, HIGH, or CRITICAL so you know what actually matters - CI/CD integration: run agentcheck --ci to fail a pipeline if findings exceed a configurable threshold, with JSON and Markdown output for automation - Configurable: extend it with your own env vars, credential files, and CLI tool checks via a config file When you hand a shell to an AI agent, it inherits everything in that environment: cloud credentials, API keys, SSH keys, kubectl contexts. That's often more access than you'd consciously grant, and it’s hard to keep track of what permissions your user account actually has. Agentcheck makes that surface area visible before you run the agent. It’s a single Go binary, no dependencies. Install with Homebrew: brew install Pringled/tap/agentcheck Code: github.com/Pringled/agentcheck Let me know if you have any feedback! https://ift.tt/Bo5Ea02 March 8, 2026 at 11:05PM

Show HN: Tessera – MCP server that gives Claude persistent memory and local RAG https://ift.tt/AEvu03P

Show HN: Tessera – MCP server that gives Claude persistent memory and local RAG https://ift.tt/HS9BX0o March 8, 2026 at 12:42AM