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Show HN: Compass CNC – Open-source handheld CNC router

Hey HN,<p>I am Cam, and for the past two years I have been working on Compass, an open-source handheld CNC router that brings computer precision to woodworking while keeping the user directly involved in the process.<p>The idea started as my senior design project at UC Berkeley, with the goal of making a more approachable CNC machine—standard CNC machines are expensive, bulky, and remove you from the tactile “maker” experience. Compass solves that by combining a handheld router with real-time robotic assistance. You move the router roughly along a design path, and Compass uses four optical flow sensors (like in computer mice) and a 3-axis motion system to auto-correct for precision cuts.<p>What is different about Compass: - Open source: All plans, firmware, and CAD files are available on GitHub. - Affordable: The DIY build costs ~$600 in parts, and I am selling kits for <$800. - No external markers: The sensing technology allows for positioning without external markers, so no setup or consumables required. - Portable: Fits in a backpack and is not limited by a fixed work envelope.<p>We recently completed our first beta program and have just launched V1 kits for pre-order. You can find more info and the launch video at the listed URL.<p>GitHub: <a href="https://github.com/camchaney/handheld-cnc">https://github.com/camchaney/handheld-cnc</a>

Show HN: Compass CNC – Open-source handheld CNC router

Hey HN,<p>I am Cam, and for the past two years I have been working on Compass, an open-source handheld CNC router that brings computer precision to woodworking while keeping the user directly involved in the process.<p>The idea started as my senior design project at UC Berkeley, with the goal of making a more approachable CNC machine—standard CNC machines are expensive, bulky, and remove you from the tactile “maker” experience. Compass solves that by combining a handheld router with real-time robotic assistance. You move the router roughly along a design path, and Compass uses four optical flow sensors (like in computer mice) and a 3-axis motion system to auto-correct for precision cuts.<p>What is different about Compass: - Open source: All plans, firmware, and CAD files are available on GitHub. - Affordable: The DIY build costs ~$600 in parts, and I am selling kits for <$800. - No external markers: The sensing technology allows for positioning without external markers, so no setup or consumables required. - Portable: Fits in a backpack and is not limited by a fixed work envelope.<p>We recently completed our first beta program and have just launched V1 kits for pre-order. You can find more info and the launch video at the listed URL.<p>GitHub: <a href="https://github.com/camchaney/handheld-cnc">https://github.com/camchaney/handheld-cnc</a>

Show HN: Compass CNC – Open-source handheld CNC router

Hey HN,<p>I am Cam, and for the past two years I have been working on Compass, an open-source handheld CNC router that brings computer precision to woodworking while keeping the user directly involved in the process.<p>The idea started as my senior design project at UC Berkeley, with the goal of making a more approachable CNC machine—standard CNC machines are expensive, bulky, and remove you from the tactile “maker” experience. Compass solves that by combining a handheld router with real-time robotic assistance. You move the router roughly along a design path, and Compass uses four optical flow sensors (like in computer mice) and a 3-axis motion system to auto-correct for precision cuts.<p>What is different about Compass: - Open source: All plans, firmware, and CAD files are available on GitHub. - Affordable: The DIY build costs ~$600 in parts, and I am selling kits for <$800. - No external markers: The sensing technology allows for positioning without external markers, so no setup or consumables required. - Portable: Fits in a backpack and is not limited by a fixed work envelope.<p>We recently completed our first beta program and have just launched V1 kits for pre-order. You can find more info and the launch video at the listed URL.<p>GitHub: <a href="https://github.com/camchaney/handheld-cnc">https://github.com/camchaney/handheld-cnc</a>

Show HN: Compass CNC – Open-source handheld CNC router

Hey HN,<p>I am Cam, and for the past two years I have been working on Compass, an open-source handheld CNC router that brings computer precision to woodworking while keeping the user directly involved in the process.<p>The idea started as my senior design project at UC Berkeley, with the goal of making a more approachable CNC machine—standard CNC machines are expensive, bulky, and remove you from the tactile “maker” experience. Compass solves that by combining a handheld router with real-time robotic assistance. You move the router roughly along a design path, and Compass uses four optical flow sensors (like in computer mice) and a 3-axis motion system to auto-correct for precision cuts.<p>What is different about Compass: - Open source: All plans, firmware, and CAD files are available on GitHub. - Affordable: The DIY build costs ~$600 in parts, and I am selling kits for <$800. - No external markers: The sensing technology allows for positioning without external markers, so no setup or consumables required. - Portable: Fits in a backpack and is not limited by a fixed work envelope.<p>We recently completed our first beta program and have just launched V1 kits for pre-order. You can find more info and the launch video at the listed URL.<p>GitHub: <a href="https://github.com/camchaney/handheld-cnc">https://github.com/camchaney/handheld-cnc</a>

Show HN: I built an AI agent that helps me invest

A while back, I built a simple app to track stocks. It pulled market data and generated daily reports based on my risk tolerance. Basically a personal investment assistant. It worked well enough that I kept going.<p>Now, the same framework helps me with real estate: comparing neighborhoods, checking flood risk, weather patterns, school zones, old vs. new builds, etc. It’s a messy, multi-variable decision—which turns out to be a great use case for AI agents.<p>Instead of ChatGPT or Grok 4, I use mcp-agent, which lets me build a persistent, multi-agent system that pulls live data, remembers my preferences, and improves over time.<p>Key pieces: • Orchestrator: picks the right agent or tool for the job • EvaluatorOptimizer: rates and refines the results until they’re high quality • Elicitation: adds a human-in-the-loop when needed • MCP server: exposes everything via API so I can use it in Streamlit, CLI, or anywhere • Memory: stores preferences and outcomes for personalization<p>It’s modular, model-agnostic (works with GPT-4 or local models via Ollama), and shareable.<p>Let me know what you all think!

Show HN: Built an email marketing platform after paying $230/month

Spent the last month building Fertit - basically a newsletter manager but you bring your own SMTP and skip the DevOps nightmare. All the features (subscriber management, admin dashboard, custom preferences) without the infrastructure markup.<p>The math that broke me: Mailchimp: $230/month for 15k contacts My solution: $10/month infrastructure + $10 SendGrid = unlimited<p>What I learned: The "enterprise" features are mostly database operations with SMTP APIs. But the 3 weeks of Go/PostgreSQL/Redis setup explains why people just pay ConvertKit $300/month. Here's the thing: Even open-sourcing it, I realized most people don't want to deal with servers, Docker configs, and database migrations. So I built an affordable hosted service starting at $5/month. More features and security measurements, zero setup - just bring your SMTP and start sending. You get all the cost savings without any of the self-hosting headaches.<p>Now testing this hosted version at $5/month - middle ground between DIY pain and SaaS pricing. Hosted version: <a href="https://www.fertit.com" rel="nofollow">https://www.fertit.com</a> Open source: <a href="https://github.com/rasadov/NewsletterManager">https://github.com/rasadov/NewsletterManager</a> Anyone else tired of choosing between expensive self-hosting and expensive SaaS? Would love feedback on the approach.

Show HN: Built an email marketing platform after paying $230/month

Spent the last month building Fertit - basically a newsletter manager but you bring your own SMTP and skip the DevOps nightmare. All the features (subscriber management, admin dashboard, custom preferences) without the infrastructure markup.<p>The math that broke me: Mailchimp: $230/month for 15k contacts My solution: $10/month infrastructure + $10 SendGrid = unlimited<p>What I learned: The "enterprise" features are mostly database operations with SMTP APIs. But the 3 weeks of Go/PostgreSQL/Redis setup explains why people just pay ConvertKit $300/month. Here's the thing: Even open-sourcing it, I realized most people don't want to deal with servers, Docker configs, and database migrations. So I built an affordable hosted service starting at $5/month. More features and security measurements, zero setup - just bring your SMTP and start sending. You get all the cost savings without any of the self-hosting headaches.<p>Now testing this hosted version at $5/month - middle ground between DIY pain and SaaS pricing. Hosted version: <a href="https://www.fertit.com" rel="nofollow">https://www.fertit.com</a> Open source: <a href="https://github.com/rasadov/NewsletterManager">https://github.com/rasadov/NewsletterManager</a> Anyone else tired of choosing between expensive self-hosting and expensive SaaS? Would love feedback on the approach.

Show HN: Lotas – Cursor for RStudio

Hey HN! We’re Jorge and Will from Lotas (<a href="https://www.lotas.ai/" rel="nofollow">https://www.lotas.ai/</a>), and we’ve built an AI coding assistant into RStudio (think Cursor for RStudio).<p>RStudio is used by about 2 million data scientists and academics, but they currently lack a coding assistant within their IDE. Developers in other environments benefit from tools like Cursor and Windsurf, but R users don’t have any equivalent tools to speed up their workflow. Since ~80% of R programmers prefer to use RStudio over other IDEs like VSCode to write R code, we figured a tool like this one could be quite useful.<p>Both of us were PhD students at Harvard. Jorge was in the biophysics program and Will was in the biostatistics program where most people used RStudio every day. We saw how integrated code assistants were taking off in other IDEs, but we noticed that the RStudio integrations were still lagging far behind. Many R users were copying and pasting code from ChatGPT to build their workflows, and this was clearly slow and fragile.<p>To bring the Cursor-like experience to RStudio users, we built Rao (<a href="https://www.lotas.ai/" rel="nofollow">https://www.lotas.ai/</a>): a fork of RStudio with an embedded AI assistant that is aware of the user’s local context (both files and variable environment), can read and write files, can run code or commands, and can interpret textual or visual output. It works with any of the file formats already in RStudio (R, notebooks including RMDs and QMDs, Python, Stan, etc.), allowing R programmers to iteratively perform entire data analyses inside their preferred IDE.<p>Other AI data science tools are either (1) built on the web or in environments people don’t already use, (2) are completely focused on python notebooks, or (3) are weak package-based assistants with limited functionality. Rao is exactly like the RStudio IDE that millions of data scientists already use, but it incorporates a powerful AI assistant and works with all the standard file types.<p>You can download Rao at <a href="https://www.lotas.ai/download" rel="nofollow">https://www.lotas.ai/download</a>, watch our demo on the homepage (<a href="https://www.lotas.ai/" rel="nofollow">https://www.lotas.ai/</a>), and work through some example use cases on our GitHub (<a href="https://github.com/lotas-ai/rao/tree/main/demos">https://github.com/lotas-ai/rao/tree/main/demos</a>). We have a one-week free trial (no card required) and provide 500 queries/month for $20/month after that. We’d love to hear feedback from the HN community to make Rao as useful as possible! You can reach us at founders@lotas.ai.<p>P.S. We have zero data retention (ZDR) agreements with OpenAI and Anthropic, but we currently recommend users do not input sensitive or regulated data like PHI into Rao until we sign BAAs with both model providers. For more information on our security practices, please visit the security page on our website <a href="https://www.lotas.ai/security" rel="nofollow">https://www.lotas.ai/security</a>.

Show HN: Lotas – Cursor for RStudio

Hey HN! We’re Jorge and Will from Lotas (<a href="https://www.lotas.ai/" rel="nofollow">https://www.lotas.ai/</a>), and we’ve built an AI coding assistant into RStudio (think Cursor for RStudio).<p>RStudio is used by about 2 million data scientists and academics, but they currently lack a coding assistant within their IDE. Developers in other environments benefit from tools like Cursor and Windsurf, but R users don’t have any equivalent tools to speed up their workflow. Since ~80% of R programmers prefer to use RStudio over other IDEs like VSCode to write R code, we figured a tool like this one could be quite useful.<p>Both of us were PhD students at Harvard. Jorge was in the biophysics program and Will was in the biostatistics program where most people used RStudio every day. We saw how integrated code assistants were taking off in other IDEs, but we noticed that the RStudio integrations were still lagging far behind. Many R users were copying and pasting code from ChatGPT to build their workflows, and this was clearly slow and fragile.<p>To bring the Cursor-like experience to RStudio users, we built Rao (<a href="https://www.lotas.ai/" rel="nofollow">https://www.lotas.ai/</a>): a fork of RStudio with an embedded AI assistant that is aware of the user’s local context (both files and variable environment), can read and write files, can run code or commands, and can interpret textual or visual output. It works with any of the file formats already in RStudio (R, notebooks including RMDs and QMDs, Python, Stan, etc.), allowing R programmers to iteratively perform entire data analyses inside their preferred IDE.<p>Other AI data science tools are either (1) built on the web or in environments people don’t already use, (2) are completely focused on python notebooks, or (3) are weak package-based assistants with limited functionality. Rao is exactly like the RStudio IDE that millions of data scientists already use, but it incorporates a powerful AI assistant and works with all the standard file types.<p>You can download Rao at <a href="https://www.lotas.ai/download" rel="nofollow">https://www.lotas.ai/download</a>, watch our demo on the homepage (<a href="https://www.lotas.ai/" rel="nofollow">https://www.lotas.ai/</a>), and work through some example use cases on our GitHub (<a href="https://github.com/lotas-ai/rao/tree/main/demos">https://github.com/lotas-ai/rao/tree/main/demos</a>). We have a one-week free trial (no card required) and provide 500 queries/month for $20/month after that. We’d love to hear feedback from the HN community to make Rao as useful as possible! You can reach us at founders@lotas.ai.<p>P.S. We have zero data retention (ZDR) agreements with OpenAI and Anthropic, but we currently recommend users do not input sensitive or regulated data like PHI into Rao until we sign BAAs with both model providers. For more information on our security practices, please visit the security page on our website <a href="https://www.lotas.ai/security" rel="nofollow">https://www.lotas.ai/security</a>.

Show HN: Lotas – Cursor for RStudio

Hey HN! We’re Jorge and Will from Lotas (<a href="https://www.lotas.ai/" rel="nofollow">https://www.lotas.ai/</a>), and we’ve built an AI coding assistant into RStudio (think Cursor for RStudio).<p>RStudio is used by about 2 million data scientists and academics, but they currently lack a coding assistant within their IDE. Developers in other environments benefit from tools like Cursor and Windsurf, but R users don’t have any equivalent tools to speed up their workflow. Since ~80% of R programmers prefer to use RStudio over other IDEs like VSCode to write R code, we figured a tool like this one could be quite useful.<p>Both of us were PhD students at Harvard. Jorge was in the biophysics program and Will was in the biostatistics program where most people used RStudio every day. We saw how integrated code assistants were taking off in other IDEs, but we noticed that the RStudio integrations were still lagging far behind. Many R users were copying and pasting code from ChatGPT to build their workflows, and this was clearly slow and fragile.<p>To bring the Cursor-like experience to RStudio users, we built Rao (<a href="https://www.lotas.ai/" rel="nofollow">https://www.lotas.ai/</a>): a fork of RStudio with an embedded AI assistant that is aware of the user’s local context (both files and variable environment), can read and write files, can run code or commands, and can interpret textual or visual output. It works with any of the file formats already in RStudio (R, notebooks including RMDs and QMDs, Python, Stan, etc.), allowing R programmers to iteratively perform entire data analyses inside their preferred IDE.<p>Other AI data science tools are either (1) built on the web or in environments people don’t already use, (2) are completely focused on python notebooks, or (3) are weak package-based assistants with limited functionality. Rao is exactly like the RStudio IDE that millions of data scientists already use, but it incorporates a powerful AI assistant and works with all the standard file types.<p>You can download Rao at <a href="https://www.lotas.ai/download" rel="nofollow">https://www.lotas.ai/download</a>, watch our demo on the homepage (<a href="https://www.lotas.ai/" rel="nofollow">https://www.lotas.ai/</a>), and work through some example use cases on our GitHub (<a href="https://github.com/lotas-ai/rao/tree/main/demos">https://github.com/lotas-ai/rao/tree/main/demos</a>). We have a one-week free trial (no card required) and provide 500 queries/month for $20/month after that. We’d love to hear feedback from the HN community to make Rao as useful as possible! You can reach us at founders@lotas.ai.<p>P.S. We have zero data retention (ZDR) agreements with OpenAI and Anthropic, but we currently recommend users do not input sensitive or regulated data like PHI into Rao until we sign BAAs with both model providers. For more information on our security practices, please visit the security page on our website <a href="https://www.lotas.ai/security" rel="nofollow">https://www.lotas.ai/security</a>.

Show HN: Pogocache – Fast caching software

Show HN: Pogocache – Fast caching software

Show HN: X11 desktop widget that shows location of your network peers on a map

Show HN: X11 desktop widget that shows location of your network peers on a map

Show HN: ggc – A terminal-based Git CLI written in Go

Hi HN,<p>I built ggc (<a href="https://github.com/bmf-san/ggc">https://github.com/bmf-san/ggc</a>), a terminal-based Git CLI tool written in Go.<p>ggc provides: - A fast interactive UI (like `fzf`) for common Git operations<p>- Traditional subcommands (e.g. `ggc add`, `ggc commit`)<p>- Git-compatible config support (`ggc config` reads from `git config`)<p>- Built-in aliases and workflow automation (e.g. `ggc addcommitpush`)<p>The goal is to improve developer productivity by combining interactive workflows with scriptable CLI operations.<p>It's still under active development, but I'd love feedback from the community!<p>GitHub: <a href="https://github.com/bmf-san/ggc">https://github.com/bmf-san/ggc</a> Demo GIF: <a href="https://github.com/bmf-san/ggc#demo">https://github.com/bmf-san/ggc#demo</a><p>Thanks!

Show HN: ggc – A terminal-based Git CLI written in Go

Hi HN,<p>I built ggc (<a href="https://github.com/bmf-san/ggc">https://github.com/bmf-san/ggc</a>), a terminal-based Git CLI tool written in Go.<p>ggc provides: - A fast interactive UI (like `fzf`) for common Git operations<p>- Traditional subcommands (e.g. `ggc add`, `ggc commit`)<p>- Git-compatible config support (`ggc config` reads from `git config`)<p>- Built-in aliases and workflow automation (e.g. `ggc addcommitpush`)<p>The goal is to improve developer productivity by combining interactive workflows with scriptable CLI operations.<p>It's still under active development, but I'd love feedback from the community!<p>GitHub: <a href="https://github.com/bmf-san/ggc">https://github.com/bmf-san/ggc</a> Demo GIF: <a href="https://github.com/bmf-san/ggc#demo">https://github.com/bmf-san/ggc#demo</a><p>Thanks!

Show HN: MCP server for Blender that builds 3D scenes via natural language

Hi HN!<p>I built a custom MCP (Model Context Protocol) server that connects Blender to LLMs like ChatGPT, Claude, and any other llm supporting tool calling and mcps, enabling the AI to understand and control 3D scenes using natural language.<p>You can describe an entire environment like:<p>> “Create a small village with 5 huts arranged around a central bonfire, add a river flowing on the left, place a wooden bridge across it, and scatter trees randomly.”<p>And the system parses that, reasons about the scene, and builds it inside Blender — no manual modeling or scripting needed.<p>What it can do: - Generate multi-object scenes like villages, landscapes, from a single prompt - Understand spatial relations — e.g., “place the bridge over the river” or “add trees behind the huts” - Create camera animations and lighting setups: “orbit around the scene at sunset lighting” - Respond to iterative changes like: “replace all huts with stone houses” or “make the river narrower” - Maintain object hierarchy and labels for later editing<p>Tech Stack: - Blender Python scripting - Node.js server running MCP - LLM backend (OpenAI / Claude, easily swappable)<p>Demo: <a href="https://blender-mcp-psi.vercel.app/" rel="nofollow">https://blender-mcp-psi.vercel.app/</a><p>GitHub: <a href="https://github.com/pranav-deshmukh/blender-mcp-demo/">https://github.com/pranav-deshmukh/blender-mcp-demo/</a><p>Curious to hear thoughts from folks in 3D tooling, AI-assisted design, or dev interface design. Would you find this useful as a Blender plugin? I’m open to expanding it!<p>Please try it and give it a star on github

Show HN: MCP server for Blender that builds 3D scenes via natural language

Hi HN!<p>I built a custom MCP (Model Context Protocol) server that connects Blender to LLMs like ChatGPT, Claude, and any other llm supporting tool calling and mcps, enabling the AI to understand and control 3D scenes using natural language.<p>You can describe an entire environment like:<p>> “Create a small village with 5 huts arranged around a central bonfire, add a river flowing on the left, place a wooden bridge across it, and scatter trees randomly.”<p>And the system parses that, reasons about the scene, and builds it inside Blender — no manual modeling or scripting needed.<p>What it can do: - Generate multi-object scenes like villages, landscapes, from a single prompt - Understand spatial relations — e.g., “place the bridge over the river” or “add trees behind the huts” - Create camera animations and lighting setups: “orbit around the scene at sunset lighting” - Respond to iterative changes like: “replace all huts with stone houses” or “make the river narrower” - Maintain object hierarchy and labels for later editing<p>Tech Stack: - Blender Python scripting - Node.js server running MCP - LLM backend (OpenAI / Claude, easily swappable)<p>Demo: <a href="https://blender-mcp-psi.vercel.app/" rel="nofollow">https://blender-mcp-psi.vercel.app/</a><p>GitHub: <a href="https://github.com/pranav-deshmukh/blender-mcp-demo/">https://github.com/pranav-deshmukh/blender-mcp-demo/</a><p>Curious to hear thoughts from folks in 3D tooling, AI-assisted design, or dev interface design. Would you find this useful as a Blender plugin? I’m open to expanding it!<p>Please try it and give it a star on github

Show HN: Conductor, a Mac app that lets you run a bunch of Claude Codes at once

<a href="https://threadreaderapp.com/thread/1945870105109246401.html" rel="nofollow">https://threadreaderapp.com/thread/1945870105109246401.html</a><p><a href="https://x.com/charliebholtz/status/1945870105109246401" rel="nofollow">https://x.com/charliebholtz/status/1945870105109246401</a>

Show HN: Conductor, a Mac app that lets you run a bunch of Claude Codes at once

<a href="https://threadreaderapp.com/thread/1945870105109246401.html" rel="nofollow">https://threadreaderapp.com/thread/1945870105109246401.html</a><p><a href="https://x.com/charliebholtz/status/1945870105109246401" rel="nofollow">https://x.com/charliebholtz/status/1945870105109246401</a>