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Show HN: Core – open source memory graph for LLMs – shareable, user owned

I keep running in the same problem of each AI app “remembers” me in its own silo. ChatGPT knows my project details, Cursor forgets them, Claude starts from zero… so I end up re-explaining myself dozens of times a day across these apps.<p>The deeper problem<p>1. Not portable – context is vendor-locked; nothing travels across tools.<p>2. Not relational – most memory systems store only the latest fact (“sticky notes”) with no history or provenance.<p>3. Not yours – your AI memory is sensitive first-party data, yet you have no control over where it lives or how it’s queried.<p>Demo video: <a href="https://youtu.be/iANZ32dnK60" rel="nofollow">https://youtu.be/iANZ32dnK60</a><p>Repo: <a href="https://github.com/RedPlanetHQ/core">https://github.com/RedPlanetHQ/core</a><p>What we built<p>- CORE (Context Oriented Relational Engine): An open source, shareable knowledge graph (your memory vault) that lets any LLM (ChatGPT, Cursor, Claude, SOL, etc.) share and query the same persistent context.<p>- Temporal + relational: Every fact gets a full version history (who, when, why), and nothing is wiped out when you change it—just timestamped and retired.<p>- Local-first or hosted: Run it offline in Docker, or use our hosted instance. You choose which memories sync and which stay private.<p>Try it<p>- Hosted free tier (HN launch): <a href="https://core.heysol.ai">https://core.heysol.ai</a><p>- Docs: <a href="https://docs.heysol.ai/core/overview">https://docs.heysol.ai/core/overview</a>

Show HN: Core – open source memory graph for LLMs – shareable, user owned

I keep running in the same problem of each AI app “remembers” me in its own silo. ChatGPT knows my project details, Cursor forgets them, Claude starts from zero… so I end up re-explaining myself dozens of times a day across these apps.<p>The deeper problem<p>1. Not portable – context is vendor-locked; nothing travels across tools.<p>2. Not relational – most memory systems store only the latest fact (“sticky notes”) with no history or provenance.<p>3. Not yours – your AI memory is sensitive first-party data, yet you have no control over where it lives or how it’s queried.<p>Demo video: <a href="https://youtu.be/iANZ32dnK60" rel="nofollow">https://youtu.be/iANZ32dnK60</a><p>Repo: <a href="https://github.com/RedPlanetHQ/core">https://github.com/RedPlanetHQ/core</a><p>What we built<p>- CORE (Context Oriented Relational Engine): An open source, shareable knowledge graph (your memory vault) that lets any LLM (ChatGPT, Cursor, Claude, SOL, etc.) share and query the same persistent context.<p>- Temporal + relational: Every fact gets a full version history (who, when, why), and nothing is wiped out when you change it—just timestamped and retired.<p>- Local-first or hosted: Run it offline in Docker, or use our hosted instance. You choose which memories sync and which stay private.<p>Try it<p>- Hosted free tier (HN launch): <a href="https://core.heysol.ai">https://core.heysol.ai</a><p>- Docs: <a href="https://docs.heysol.ai/core/overview">https://docs.heysol.ai/core/overview</a>

Show HN: I built the tool I wished existed for moving Stripe between countries

In late 2024, I had to set up a new Stripe account because I incorporated my company in a different country. Turns out it's not as simple as just changing the country in a dropdown, you have to start from scratch.<p>I had hundreds of users and using Stripe's dashboard to add all of the products, prices, coupons and subscriptions manually would take ages. I contacted a couple of services that help with this kind of migration, but their quotes were way over my budget. My next option was to use Stripe's API, which is very powerful but also very complicated. I'm a designer who can code, but I didn't feel confident doing it alone, so I asked a friend, an experienced developer, to help.<p>It proved to be quite challenging, with many details and caveats we had to learn as we went. What we thought would take a couple of days took us a week.<p>After this experience, we teamed up and built <a href="https://stripemove.com" rel="nofollow">https://stripemove.com</a>, a tool that guides you through this whole process, explaining and automating that hard week we went through. It handles the technical complexity while keeping your business running. Customers keep paying on your old account while everything transfers in parallel, then you flip the switch when ready.<p>It's a very niche tool, built for founders who need to change their company location for personal or business reasons. For entrepreneurs buying companies established in other countries. For people in the same situation I was in a few months ago. Basically the tool I wished existed, and for a fair price. Designed to get you through this inconvenient process and back as soon as possible on growing your business.<p>Would love to hear from anyone who's dealt with similar Stripe migrations. What was your biggest pain point?

Show HN: I built the tool I wished existed for moving Stripe between countries

In late 2024, I had to set up a new Stripe account because I incorporated my company in a different country. Turns out it's not as simple as just changing the country in a dropdown, you have to start from scratch.<p>I had hundreds of users and using Stripe's dashboard to add all of the products, prices, coupons and subscriptions manually would take ages. I contacted a couple of services that help with this kind of migration, but their quotes were way over my budget. My next option was to use Stripe's API, which is very powerful but also very complicated. I'm a designer who can code, but I didn't feel confident doing it alone, so I asked a friend, an experienced developer, to help.<p>It proved to be quite challenging, with many details and caveats we had to learn as we went. What we thought would take a couple of days took us a week.<p>After this experience, we teamed up and built <a href="https://stripemove.com" rel="nofollow">https://stripemove.com</a>, a tool that guides you through this whole process, explaining and automating that hard week we went through. It handles the technical complexity while keeping your business running. Customers keep paying on your old account while everything transfers in parallel, then you flip the switch when ready.<p>It's a very niche tool, built for founders who need to change their company location for personal or business reasons. For entrepreneurs buying companies established in other countries. For people in the same situation I was in a few months ago. Basically the tool I wished existed, and for a fair price. Designed to get you through this inconvenient process and back as soon as possible on growing your business.<p>Would love to hear from anyone who's dealt with similar Stripe migrations. What was your biggest pain point?

Show HN: I built the tool I wished existed for moving Stripe between countries

In late 2024, I had to set up a new Stripe account because I incorporated my company in a different country. Turns out it's not as simple as just changing the country in a dropdown, you have to start from scratch.<p>I had hundreds of users and using Stripe's dashboard to add all of the products, prices, coupons and subscriptions manually would take ages. I contacted a couple of services that help with this kind of migration, but their quotes were way over my budget. My next option was to use Stripe's API, which is very powerful but also very complicated. I'm a designer who can code, but I didn't feel confident doing it alone, so I asked a friend, an experienced developer, to help.<p>It proved to be quite challenging, with many details and caveats we had to learn as we went. What we thought would take a couple of days took us a week.<p>After this experience, we teamed up and built <a href="https://stripemove.com" rel="nofollow">https://stripemove.com</a>, a tool that guides you through this whole process, explaining and automating that hard week we went through. It handles the technical complexity while keeping your business running. Customers keep paying on your old account while everything transfers in parallel, then you flip the switch when ready.<p>It's a very niche tool, built for founders who need to change their company location for personal or business reasons. For entrepreneurs buying companies established in other countries. For people in the same situation I was in a few months ago. Basically the tool I wished existed, and for a fair price. Designed to get you through this inconvenient process and back as soon as possible on growing your business.<p>Would love to hear from anyone who's dealt with similar Stripe migrations. What was your biggest pain point?

Show HN: Jobs by Referral: Find jobs in your LinkedIn network

I have some friends who were laid off and are on the job hunt. We were all quite surprised to learn that LinkedIn does not have a "view jobs only at companies where I have connections", so I built <a href="https://jobsbyreferral.com/" rel="nofollow">https://jobsbyreferral.com/</a><p>It's powered by <a href="https://rapidapi.com/letscrape-6bRBa3QguO5/api/jsearch" rel="nofollow">https://rapidapi.com/letscrape-6bRBa3QguO5/api/jsearch</a>, which is a little pricey, so I'm trying to decide whether to put more effort into the project (I'd have to charge _something_ to offset the costs).

Show HN: Jobs by Referral: Find jobs in your LinkedIn network

I have some friends who were laid off and are on the job hunt. We were all quite surprised to learn that LinkedIn does not have a "view jobs only at companies where I have connections", so I built <a href="https://jobsbyreferral.com/" rel="nofollow">https://jobsbyreferral.com/</a><p>It's powered by <a href="https://rapidapi.com/letscrape-6bRBa3QguO5/api/jsearch" rel="nofollow">https://rapidapi.com/letscrape-6bRBa3QguO5/api/jsearch</a>, which is a little pricey, so I'm trying to decide whether to put more effort into the project (I'd have to charge _something_ to offset the costs).

Show HN: Jobs by Referral: Find jobs in your LinkedIn network

I have some friends who were laid off and are on the job hunt. We were all quite surprised to learn that LinkedIn does not have a "view jobs only at companies where I have connections", so I built <a href="https://jobsbyreferral.com/" rel="nofollow">https://jobsbyreferral.com/</a><p>It's powered by <a href="https://rapidapi.com/letscrape-6bRBa3QguO5/api/jsearch" rel="nofollow">https://rapidapi.com/letscrape-6bRBa3QguO5/api/jsearch</a>, which is a little pricey, so I'm trying to decide whether to put more effort into the project (I'd have to charge _something_ to offset the costs).

Show HN: Jobs by Referral: Find jobs in your LinkedIn network

I have some friends who were laid off and are on the job hunt. We were all quite surprised to learn that LinkedIn does not have a "view jobs only at companies where I have connections", so I built <a href="https://jobsbyreferral.com/" rel="nofollow">https://jobsbyreferral.com/</a><p>It's powered by <a href="https://rapidapi.com/letscrape-6bRBa3QguO5/api/jsearch" rel="nofollow">https://rapidapi.com/letscrape-6bRBa3QguO5/api/jsearch</a>, which is a little pricey, so I'm trying to decide whether to put more effort into the project (I'd have to charge _something_ to offset the costs).

Show HN: Spegel, a Terminal Browser That Uses LLMs to Rewrite Webpages

Show HN: Spegel, a Terminal Browser That Uses LLMs to Rewrite Webpages

Show HN: Spegel, a Terminal Browser That Uses LLMs to Rewrite Webpages

Show HN: I built a daily sunlight tracker

I kept trying to explain how important outdoor light is and how most people aren’t getting enough. Eventually I figured that showing is more effective than telling.<p>So we built a free app that uses your Apple Watch or iPhone to automatically track your light exposure throughout the day.<p>It tells you if you’re getting enough, shows you how consistent you are, and rewards habits that support hormone balance.<p>It's in beta on TestFlight, let me know what you think!

Show HN: Open-Source International Space Station Tracker ESP32/Arduino for $20

International Space Station Tracker on an ESP32 CYD (Cheap Yellow Display) costing $20. Live update over Wifi, touchscreen, backlight power management. Cheap and interesting classroom STEM project. Fully open source.

Show HN: We're two coffee nerds who built an AI app to track beans and recipes

It’s available on iOS now: <a href="https://itunes.apple.com/app/id6499280064" rel="nofollow">https://itunes.apple.com/app/id6499280064</a><p>We got into specialty coffee during COVID and, like many others, fell deep down the rabbit hole. Along the way, we ran into the same frustrations:<p>- A drawer full of empty coffee bags.<p>- No simple way to track grind size, rest dates, notes—by bean.<p>- My coffee history scattered across photos, screenshots, notebooks, and half-memories.<p>- The unique traits, people, and stories behind each coffee disappearing from the internet once it sold out (since coffee is an agricultural good)<p>- In our opinion, no coffee tool really captures the flavor, emotion, and aesthetic of great coffee—from a design perspective.<p>So we built BeanBook—a coffee notebook log beans, extract recipes, and organize your coffee life in one place with just a snap, powered by AI<p>Here’s what it does:<p>- Snap a bag → Auto-detects roaster, origin, process, roast date, notes, producer, farm, and more<p>- Paste a YouTube link or photo → Extracts a structured recipe automatically<p>- Log grind size, roast timeline, ratings & notes → All saved in a clean, elegant UI<p>- See your coffee year in review → Track habits, trends, and favorites<p>- Ask BeanBook AI → From brew temps to bean facts, get instant answers<p>My co-founder and I built everything ourselves—branding, code, and UX design. If you’re into coffee (or trying to get more into it), we’d love your feedback.<p>- Rokey & Eric

Show HN: We're two coffee nerds who built an AI app to track beans and recipes

It’s available on iOS now: <a href="https://itunes.apple.com/app/id6499280064" rel="nofollow">https://itunes.apple.com/app/id6499280064</a><p>We got into specialty coffee during COVID and, like many others, fell deep down the rabbit hole. Along the way, we ran into the same frustrations:<p>- A drawer full of empty coffee bags.<p>- No simple way to track grind size, rest dates, notes—by bean.<p>- My coffee history scattered across photos, screenshots, notebooks, and half-memories.<p>- The unique traits, people, and stories behind each coffee disappearing from the internet once it sold out (since coffee is an agricultural good)<p>- In our opinion, no coffee tool really captures the flavor, emotion, and aesthetic of great coffee—from a design perspective.<p>So we built BeanBook—a coffee notebook log beans, extract recipes, and organize your coffee life in one place with just a snap, powered by AI<p>Here’s what it does:<p>- Snap a bag → Auto-detects roaster, origin, process, roast date, notes, producer, farm, and more<p>- Paste a YouTube link or photo → Extracts a structured recipe automatically<p>- Log grind size, roast timeline, ratings & notes → All saved in a clean, elegant UI<p>- See your coffee year in review → Track habits, trends, and favorites<p>- Ask BeanBook AI → From brew temps to bean facts, get instant answers<p>My co-founder and I built everything ourselves—branding, code, and UX design. If you’re into coffee (or trying to get more into it), we’d love your feedback.<p>- Rokey & Eric

Show HN: A continuation of IRS Direct File that can be self-hosted

the IRS recently open sourced most of Direct File, a tax tool it has been working on for a few years now. unfortunately, due to recent events, the IRS isn't working on it anymore. I decided to pick up where they left off and I'm trying to get it ready for next tax season<p>the work behind Direct File is really interesting and I made a lot of it available online to read as well - <a href="https://docs.openfile.tax/en/latest/" rel="nofollow">https://docs.openfile.tax/en/latest/</a>

Show HN: A continuation of IRS Direct File that can be self-hosted

the IRS recently open sourced most of Direct File, a tax tool it has been working on for a few years now. unfortunately, due to recent events, the IRS isn't working on it anymore. I decided to pick up where they left off and I'm trying to get it ready for next tax season<p>the work behind Direct File is really interesting and I made a lot of it available online to read as well - <a href="https://docs.openfile.tax/en/latest/" rel="nofollow">https://docs.openfile.tax/en/latest/</a>

Show HN: A continuation of IRS Direct File that can be self-hosted

the IRS recently open sourced most of Direct File, a tax tool it has been working on for a few years now. unfortunately, due to recent events, the IRS isn't working on it anymore. I decided to pick up where they left off and I'm trying to get it ready for next tax season<p>the work behind Direct File is really interesting and I made a lot of it available online to read as well - <a href="https://docs.openfile.tax/en/latest/" rel="nofollow">https://docs.openfile.tax/en/latest/</a>

Show HN: A continuation of IRS Direct File that can be self-hosted

the IRS recently open sourced most of Direct File, a tax tool it has been working on for a few years now. unfortunately, due to recent events, the IRS isn't working on it anymore. I decided to pick up where they left off and I'm trying to get it ready for next tax season<p>the work behind Direct File is really interesting and I made a lot of it available online to read as well - <a href="https://docs.openfile.tax/en/latest/" rel="nofollow">https://docs.openfile.tax/en/latest/</a>