I made a private self-destructing image hosting site in Golang
So I'm a junior Go dev and I made a small site that allows me to share images with someone privately and securely, and give me control over how many times the private link can be shared and how long the image will be accessible for. There are similar services to this one, but they are either convoluted with ads, or require sign-up, or expect you to fill out a survey or something. picburn is small, safe, and has no interest (nor the code or the server space) for storing your uploads. give it a try if it fits your usecase and let me know what you think. Note: there was a typo in the url
Bor
Hi HN! I've been working on Bor, an open-source system for centralized Linux desktop management. Bor consists of a lightweight Go agent and a central server. Policies are streamed to clients over mTLS/gRPC in real time—no polling—and currently support Firefox, Chrome, KDE, dconf, polkit and package management, with more coming. Version 0.8 introduces several new policy types - Thunderbird, Microsoft Edge for Business and FirewallD zones, along with a number of improvements and fixes. I'd love feedback on the architecture, policy model, and whether this is something you'd consider for managing Linux workstations.
CostPerPrompt
Show HN: CostPerPrompt – Live AI API pricing and real-workload cost calculators
Cockpit for you Claude Code agents in Rust
Hi everyone! Hope you had a great day so far, and maybe its about to get just a little bit better (thanks Winter ;) So I had way to many terminal windows flying about when using Claude, and kept losing track of which terminal / session / project im in right now. So I built a solution for that, presented it to my team, and now we're using our new tool all the time, and developing it to be the most helpful agents organization tool we can think of. Unfortunatelly, Claude Code only for now, will do Codex soon tho. What it does for you: Main features: - Overview of your projects, with branches, worktrees, etc. - Start sessions in the integrated terminal, in whatever branch or worktree you want - Your projects run scripts all auto-discovered in one place - Complete Claude history to resume convo's easily Comfort: - Project overview: commits, PRs, notes, timeline with summaries - Context usage and session costs (to see what you would have payed without a subscription) - Cost aggregation for the entire day - Use dashboard with daily costs, consumed tokens per project, livetime spent - 5h and 7d window predictions aka. if you keep going at the same spend/token burn, will you run into your limits And likely many more features I forgot right now. Anyways, its all open-source (MIT), if this sounds interesting / useful, check it out at https://github.com/respeak-io/episko, feel free to comment / contribute, and happy building! And enjoy the weekend.
How to build and self-host a code review agent
Hey HN, I've had a side-project that I've slowly ticked away at over the last year called Tilde. Tilde is a harness SDK platform - I've tried to take the best things of OpenClaw, Hermes & other harnesses and decompose them and make them available as cloud API building blocks. You can use Tilde to create AI agents for your use case, fast and self-host the agent's yourself. The documentation (and attached blog post) leave a lot to be desired in terms of technical documentation but hopefully the attached git repo does a good job of showcasing the API. https://github.com/trytilde/examples
I built a cross-browser extension that controls fingerprinting surfaces
Hello Hacker News! I’m Tomasz, creator of Privacy Thing, a browser extension for Firefox and Chromium-based browsers. I’ve just released its Preview version. Privacy Thing aims to reduce browser fingerprinting—the tracking of users without cookies. It began as an internal project: a simple location simulator. Over time, I expanded it to cover more fingerprinting surfaces. It now has 13 protection categories affecting 50+ browser APIs and methods: Geolocation, time and locale settings, Canvas, WebGL, Audio, Navigator, Screen, Client Hints, Battery, WebRTC, Dedicated Workers, Service Workers, and Shared Workers. The list is still growing. The extension is fully configurable. Users can create regional profiles and assign them to domain rules, with separate protection settings for each domain. Or they can skip domain rules and rely on the global configuration—I’m not here to decide what works best for them :-) Privacy Thing uses Manifest V3, with all its pros and cons. Chrome and Firefox appear to offer similar extension APIs, but differ fundamentally at the level where Privacy Thing operates. This matters because its scripts must load as early as possible to be effective. Its X-Ray module communicates with scripts running in the page context to show which APIs a site uses and how often it queries them. An aggregate count appears on the extension’s toolbar badge by default. Each release includes processed, compact datasets covering Chrome build numbers, supported language codes, language-to-country mappings, popular screen resolutions, and hardware configurations. This keeps the extension independent of external services and there is no good reason to build extra infrastructure for it. There are two exceptions. The regional preset wizard uses OpenStreetMap’s Nominatim geocoding service, but only after the user consents to sending the query. Maps are displayed using OpenFreeMap. Presets can also be created manually. Users who know the coordinates can enter them directly without contacting any 3rd-party service. The extension does not transmit telemetry or usage data. This makes development harder, but it is fundamental to its identity: user data belongs to the user. Privacy Thing configuration can be exported, edited and imported. The Preview is currently distributed under a proprietary license. This is not ideal; I ultimately intend to release the source under an open-source license, most likely the AGPL. More about the development process: https://tomaszjanusz.dev/en/projects/privacy-thing/ Download: - Mozilla Addons: https://addons.mozilla.org/en-US/firefox/addon/privacy-thing... - Chrome Web Store: https://chromewebstore.google.com/detail/privacy-thing-previ... The extension is STILL under review in the Microsoft Edge Add-ons store -_- Thank you for your suggestions and feedback. Please remember that this is still a preview: some things may not work, may be slower, or may not behave as intended. I sincerely hope such issues will be few and far between. P.S. Yes, Privacy Thing fully supports Firefox Containers. I like the concept and believe extensions should support containers whenever possible. Privacy Thing will support them elsewhere too, including Brave, if Brave Software makes its container API public.
Widen
Github: https://github.com/betocmn/widen I was paying for DataGrip for several years as my desktop database GUI but if I wanted text-to-SQL with LLMs I'd have to pay even more on top. So I decided to build my own and I've been using it for a few weeks now. At any time I'm usually working with 3 to 6 databases, and having them set up in something like Conductor (for parallel agentic coding), but for Postgres databases, lets me quickly start a session, ask questions to my database in plain English, get a data export, move on and close the session. It's been working well and I thought I would share it here. It's a native Mac app (Swift), free and open source (MIT). For the LLM you bring your own OpenRouter key, or there's an experimental on-device mode using Apple's local model, where nothing leaves your Mac. Cloud mode only sends the question and schema metadata, not your data, unless you explicitly turn that on per connection.
Replicant Space
During Christmas 2025, I found myself burnt out from work. The last few years had been hard, and multiple redundancies saw the company I loved reduce down to just a handful of remaining staff. As a coping mechanism, I kinda disassociated for a while - throwing myself into my personal projects. AI was destroying the passion I had for coding. I tried to find some meaning in development again. After months of throwing myself into creating this game, I slowly fell back in love with coding. I taught myself a bunch of technologies that I was previously unfamiliar - Astro, Flask, Redis, Celery, Just. Anyway, this is Replicant Space. It's free. I love building and playing it. There's a cool story. Aliens are awesome. Feel free to poke the API and take over the galaxy.
A free curl API for IP data (we scan the IPv4 space in <24h)
The curl API for WorldIP is now live and completely free to use. You can hit it right from your terminal: curl worldip.io — returns information about your requesting IP. curl worldip.io/8.8.8.8 — returns details on any specific IP. The main differentiator here is that we aren't just wrapping another provider's API and reselling their data. We built and run our own global infrastructure capable of scanning the entire IPv4 space in about a day. Happy to answer any questions about the scanning infrastructure or the stack!
Vivari
Show HN: Vivari – Open-Source WebContainer for Node, Bun, and Python
Flashpaper
Hi everyone! This is my first HN and I’m very new to the scene. My name is Min from Bangkok. At first, I just want to create a dead man's switch for personal use and for fun. then, I think about information that self destruct like a spy movie. after that, I try to come up with the better version of Privnote or Bitwarden with self-destruct and some kind of censoring or blocking download ability. Somehow, end up with this product. :O Flashpaper is for sending any information that would be burned after reading (with counting down timer like Mission Impossible movie ! or after 24 hrs max if not opened) Encryption happens in browser and because the key stays after # in the link; server never sees the key (Zero-knowledge for web use) and— because I’m a newbie. I don’t want to connect to database because I don’t have the money and I want things light and simple. So, that’s why Flashpaper keeps things in RAM-only, no database. For AI Agent side, Flashpaper provides a REST API and an MCP server so agents can create secret links easily in dead-drop style that can be claimed only once. The second claim would get a 404 which means someone already took it. However, for the agent API flow, the server sees the plaintext for a moment before encrypting, so this flow is not zero-knowledge like the web flow. Overall, I think it work quite well for web use, but for agent API use, I am not sure this is enough security. All the limitations are listed in SECURITY.md. Some feedback would be appreciated. I make it open source with MIT license, with honorware policy for Enterprise use, like self-hosted docker. Here is my repo https://github.com/mmmpym/flashpaper and you can try it here https://flashpaper.app Again ! Please feel free to tell me what I missed. Min
Rise-reforming
Hi HN! This is George, Lucas, and Jona from Rise Reforming (https://www.rise-reforming.com/). We’re developing a process to convert gas produced at landfills, farms, and wastewater plants (“biogas”) into higher value chemicals. Our technology is modular, designed to be deployed and operated on-site. Think of us as a chemical project developer; we sit between biogas producers (suppliers) and chemical end users (customers). We pay biogas producers for their gas and we make money from selling our chemicals. We're starting with dimethyl ether (DME) as our beachhead chemical because of its high-margin use case in the cosmetics industry and ultimately targeting methanol – a versatile and widely used industrial chemical. Being in a two sided market allows us to target two large problems. (1) On the chemical side: The multi-trillion dollar U.S. chemical and fuel industries are vulnerable to geopolitical conflicts and climate-driven natural disasters. The Iran war has caused global methanol prices to skyrocket – even in the U.S., a net exporter of methanol. (https://www.spglobal.com/energy/en/news-research/latest-news... the US). In 2021, Winter Storm Uri wiped out 60% of U.S. organic chemicals production for at least a month (https://www.dallasfed.org/research/swe/2021/swe2102/swe2102c...). The problem? Centralized production and fossil-fuel dependence. The solution isn't unknown; decentralized, fossil-free production could insulate supply chains from these shocks. But distributed green chemical production has yet to become cost-competitive with the status quo. Unlocking it requires the right feedstock paired with the right process and strategy. Also, the chemical industry’s reliance on fossil fuels makes it responsible for 5-6% of global greenhouse gas emissions. About 40% of the industry’s well-to-gate emissions come from just the extraction, processing, and transportation of these fossil fuels (https://rmi.org/resources/chemistry-in-transition-charting-s...). (2) Biogas is an ideal feedstock to address Problem 1. It is decentralized, plentiful, and a large part of it is not properly utilized. Biogas is a mixture of methane (CH4) and carbon dioxide (CO2), produced as a result of anaerobic digestion at landfills, farms, and wastewater plants, and can be used as a raw material in chemical manufacturing. The U.S. produces around 780 billion cubic feet of biogas a year – if we converted all that biogas into methanol, that’s about $20 billion a year. Currently, about 60% of this biogas is either burned for power/heat (low-margin and unreliable) or flared altogether. The rest is used in the highly subsidized renewable natural gas (RNG) market (https://americanbiogascouncil.org/abcs-data-digest-lite-july...). The result: many biogas producers leave substantial revenue on the table and experience huge operational headaches. Our modular technology takes in biogas, electricity, and water as inputs. Co-location with biogas producers allows us to tap into their existing infrastructure and speeds up permitting vs a greenfield project. Our 3 step process is outlined below: Step 1: We clean the biogas of contaminants. That means running the gas over specialized adsorbents that trap any nasty sulfur-containing and silicon-containing compounds we don’t want in our process. Step 2: We reform that biogas into an intermediate gas called syngas through the bi-reforming process, which combines the novel dry methane reforming reaction with the legacy steam methane reforming reaction. Syngas is a versatile combination of H2 and CO and is the building block for many chemicals, allowing us to be a platform company. Step 3: Lastly, we upgrade that syngas into our end chemicals. We do this step using conventional catalysts and operating conditions. The modular approach paired with our patent-pending integrated process makes our solution one of the cheapest ways of making green chemicals. Where are we today? We’ve completed our proof-of-concept in the lab and just broke ground on our pilot plant at a Chicagoland wastewater plant that currently flares all of its biogas. We will convert that wasted biogas into methanol. Estimated commissioning is Q1 2027. We all met at the University of Chicago studying Molecular Engineering and started the company back in June 2024. Rise Reforming’s first iteration came after attending a talk from an Argonne National Laboratory researcher on low-carbon fuels. In that seminar, we heard about a reaction called “dry reforming” wherein one can react CH4 with CO2, effectively eliminating both pollutants and making useful syngas (CO + H2). We realized that this reaction could enable cheaper decarbonization of chemicals than the legacy electrolysis pathway and started to build a technoeconomic analysis. George has a background in energy generation, storage, and carbon capture. He was an early employee at Highland Electric Fleets (now a unicorn) and later worked at Nexamp, GenH, and Mantel Capture – researching various battery chemistries, building a first-of-a-kind (FOAK) modular hydropower system, and helping prove a novel point-source capture prototype. He also conducted battery research at UChicago's Patel Lab and Rowan Group, co-authoring two papers. Lucas led the design, procurement, construction, and operation of Rise Reforming’s bench-scale reforming unit with controls that operated successfully for over 1800+ continuous hours. Prior to Rise, he worked at Avangrid (Iberdrola Group) with the offshore wind project services team and did transmutation research of spent nuclear fuel at Argonne National Laboratory. Jona also studied Molecular Engineering at the University of Chicago. He grew up around the marine industry and brings deep knowledge of the space to the team. While at UChicago, he conducted research in the Patel Lab on batteries and sustainable polymer applications and built novel equipment for the lab, including a high-throughput cyclic voltammetry battery performance testing device. Our advisory board has 220+ combined years in aerosols, permitting/safety, low-carbon fuels, catalysts, scale-up, automated modular chemical plants, and wastewater treatment. Here’s our launch video if you want to put faces to the names: https://youtu.be/Bx_ASPapxlQ?si=PAlqvd1eUhW8kjJm. We’d appreciate any feedback, questions, or advice. Thank you for reading! George, Lucas, and Jona