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[Other] z386: An Open-Source 80386 Built Around Original Microcode

[Other] 754 structured cybersecurity skills for AI agents · Mapped to 5 frameworks: MITRE ATT&CK, NIST CSF 2.0, MITRE ATLAS, D3FEND & NIST AI RMF · agentskills.io standard · Works with Claude Code, GitHub Copilot, Codex CLI, Cursor, Gemini CLI & 20+ platforms · 26 security domains · Apache 2.0

[Database] Models.dev: open-source database of AI model specs, pricing, and capabilities

[DevOps] Show HN: OpenRig – a control plane for multi-agent coding topologies Hi HN, I’m Mike, the founder of OpenRig.<p>I built this because my Claude Code + Codex setup kept forming little &quot;topologies&quot; of long-lived agents that worked well together, but the terminal sprawl was intense. So I built a primitive the agents could intuitively reach for to save and recreate these setups on the fly. This then led to more agent-first primitives like coordination, declarative workflow patterns, workspaces, etc.<p>Several months in and these &quot;rigs&quot; I manage with openrig require a lot less babysitting and I can manage more projects at once without getting overwhelmed.<p>The short version: OpenRig is a way to save and operate that topology instead of rebuilding it by hand every time.<p>Demo video: <a href="https:&#x2F;&#x2F;youtu.be&#x2F;yCFSRnPDFqY?si=n5e627d0CU3X3bmE" rel="nofollow">https:&#x2F;&#x2F;youtu.be&#x2F;yCFSRnPDFqY?si=n5e627d0CU3X3bmE</a><p>GitHub: <a href="https:&#x2F;&#x2F;github.com&#x2F;mvschwarz&#x2F;openrig" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;mvschwarz&#x2F;openrig</a>

[Other] GitHub introduces staged publishing and new install-time controls for NPM

[Other] Microsoft starts canceling Claude Code licenses <a href="https:&#x2F;&#x2F;archive.ph&#x2F;WfCta" rel="nofollow">https:&#x2F;&#x2F;archive.ph&#x2F;WfCta</a>

[Other] TorQ: Kdb+ Production Framework

[Build/Deploy] Show HN: Darnix – Darwin Built with Nix The Darwin kernel (XNU) has been open source since 1999. But &quot;open source&quot; and &quot;you can actually build and boot it&quot; are very different things. XNU depends on proprietary tooling, kexts, and a bunch of open source projects published without a build system.<p>Darnix builds the whole thing with Nix. The kernel, the filesystem, the boot image, all the way to a running QEMU instance. We patched XNU to run on QEMU without kexts, ported HFS+ from a kernel extension into the kernel itself, fixed GRUB&#x27;s Mach-O loader, and wired it all together as a flake. The build is fully sandboxed. No root, no volume mounting, no device access, no network.<p>The bigger idea is a revival of PureDarwin (<a href="https:&#x2F;&#x2F;www.puredarwin.org&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.puredarwin.org&#x2F;</a>), a standalone OS on Apple&#x27;s open source Darwin layer, with Nix managing everything above the kernel. Sort of like a Nix OS on XNU instead of Linux.<p>Right now the kernel boots, mounts a ramdisk, and runs a single static binary. Next step is a shell.<p><a href="https:&#x2F;&#x2F;github.com&#x2F;jonhermansen&#x2F;darnix" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;jonhermansen&#x2F;darnix</a><p>Technical details and the full list of patches are in the README. I would love to hear from anyone who’s thought about this space!<p>---<p>Darnix is not affiliated with or endorsed by Apple Inc. This is not macOS. Apple, macOS, and related trademarks are the property of Apple Inc. Darwin is licensed under the APSL.

[Other] Show HN: Pablo – a Chrome extension that copies UI from any website Pablo is a Chrome extension that copies the HTML and CSS behind any element you hover.<p>It captures computed styles, fonts (with @font-face and Google Fonts links), CSS keyframes, and animation props from GSAP and Framer Motion. The output is structured so it pastes cleanly into Claude Code, Cursor, or Codex when you want to rebuild a component in your own stack.<p>Manifest v3, no host permissions, no backend. Free.<p><a href="https:&#x2F;&#x2F;usepablo.dev" rel="nofollow">https:&#x2F;&#x2F;usepablo.dev</a><p>Happy to answer questions about how the extraction works, and would love to hear about sites where the output breaks.

[Other] FinceptTerminal is a modern finance application offering advanced market analytics, investment research, and economic data tools, designed for interactive exploration and data-driven decision-making in a user-friendly environment.

[Other] Show HN: ShadowCat – file transfer through QR Codes in a Browser

[API/SDK] Show HN: I made an open-source memory layer for agents Store memories, auto-extract entities and relationships, search semantically. MCP server + REST API + SDKs. Self-hostable, cloud option, MIT license.

[Other] Show HN: Sylph – the open-source company brain behind my YC startup Hello HN! I&#x27;m Claire, founder of nao Labs (YC X25). Two months ago I started building a company brain in a git repo. Now I fully run my company with 8 AI agents, 20+ skills, and a self-learning context repo.<p>I built it in a git repo because I refused to lock into any tool - not a context layer, not a specific agent harness. Today I&#x27;m open sourcing it so others can build their own.<p>Sylph is the open source version of the company brain I use. It gives you the structure to host your own company context, build skills, create AI agents, and already has a self-learning loop scaffolded. It is a Git repo, with no lock-in on any tool, that can work with any agent: Claude Code, Codex, Cursor.<p>Sylph is made for you to make your own: fork it, run &#x2F;sylph-setup, and it will build your own company brain according to your own context.<p>Repo: github.com&#x2F;getnao&#x2F;sylph<p>How I built it: <a href="https:&#x2F;&#x2F;thenewaiorder.substack.com&#x2F;p&#x2F;i-built-a-company-brain-to-run-my" rel="nofollow">https:&#x2F;&#x2F;thenewaiorder.substack.com&#x2F;p&#x2F;i-built-a-company-brain...</a><p>Tell me what you think, and if you&#x27;ve got some tips if you built an AI brain for your company too!

[Other] Slumber a TUI HTTP Client

[Other] Show HN: Open-source .docx editor library for building document apps We are working on an open-source .docx editor library for apps that need to edit Word documents in the browser. We just shipped 1.0.<p>A lot of existing approaches convert .docx into HTML and lose document semantics along the way. Our editor parses OOXML directly and uses its own rendering+layout engine to produce paged documents with html&#x2F;css. Edits round-trip back to .docx, so you’re always editing the document, not its representation.<p>The core rendering engine is framework agnostic, with React and Vue ui adapters on top.<p>It’s Apache 2.0. Happy to answer questions.

[DevOps] Launch HN: Runtime (YC P26) – Sandboxed coding agents for everyone on a team Hey HN, We&#x27;re Gus and Carlos from Runtime (<a href="https:&#x2F;&#x2F;runtm.com">https:&#x2F;&#x2F;runtm.com</a>). We&#x27;re building infra that lets your whole team (including non-engineers) ship with Claude Code, Codex, and other agents without engineering having to handhold every session.<p>After Mentum (YC S21) was acquired, I personally shipped 4 full-stack products in 3 months using coding agents. When I tried to roll the same workflow out to the rest of the team, it fell apart: Most PRs were unmergeable slop - Every repo required an engineer doing one-off local setup. - Skills and context lived in one person&#x27;s head. - There was no safe way for a PM to touch a real codebase without risking a bad deploy or a secrets leak.<p>Carlos comes from building agentic reconciliation systems at Modern Treasury and had a similar experience when letting his support team use devin.<p>We ended up building internal background agent infra but it quickly became a nightmare to mantain and develop. We built Runtime so you don&#x27;t have to do this kind of thing.<p>Runtime work like as follows. Engineering defines the context once: system instructions, skills, and scoped integrations installable via CLI, mise, npm, or any package manager. Then Runtime snapshots your full running environment including multi-service Docker Compose setups, Kafka, Redis, seeded DBs, so it comes up in milliseconds with every server already running.<p>We orchestrate across sandbox providers like E2B, Daytona, EC2 or self-hosted K8s depending on your setup. Secrets are injected through our managed proxy so they never touch the agent directly, and guardrails run at the infrastructure level: command allow&#x2F;deny lists, network egress controls, and RBAC scoped per human and per agent. Every session also gets a shareable preview URL, so internal builds go from sandbox to the rest of the team without needing production access.<p>Runtime works with whichever agent your team already uses: Claude Code, Codex, Cursor, Copilot, Gemini, Devin. You can trigger sandboxes from our web app, CLI, Slack, Linear, GitHub, or API.<p>One of our customers built an on-call inspector that wires PagerDuty, Sentry, and their repo so when an alert fires, the agent finds the cause and opens a PR with a unit test before anyone gets paged. Another runs a finance agent in a private Slack channel pulling from Stripe, NetSuite, and Snowflake to run reconciliations in minutes with source rows attached.<p>A fintech unicorn and several YC scaleups are live on Runtime, including a few teams who had built similar infrastructure internally and handed it to us to take over.<p>The core is open source at <a href="https:&#x2F;&#x2F;github.com&#x2F;runtm-ai&#x2F;runtm" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;runtm-ai&#x2F;runtm</a>. Hosted version is live at <a href="https:&#x2F;&#x2F;app.runtm.com">https:&#x2F;&#x2F;app.runtm.com</a>, free tier included. We&#x27;re charging a flat platform fee plus compute, no token markup.<p>Check our demo: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=wLwj__aEEh4" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=wLwj__aEEh4</a><p>We&#x27;d love to hear how you&#x27;re thinking about the infra for letting more people across your org use coding agents without creating chaos!

[Other] We Reverse-Engineered Docker Sandbox's Undocumented MicroVM API

[Other] Show HN: Freenet, a peer-to-peer platform for decentralized apps For the past 5 years or so I&#x27;ve been working on a ground-up redesign of Freenet, my peer-to-peer project from the early 2000s (now renamed Hyphanet).<p>The new Freenet has been up and running since December along with some early applications like River[1], our decentralized group chat and Delta - a decentralized CMS. Users have already started to build their own apps on Freenet including games, and we have some interesting apps in development like Atlas, a search&#x2F;recommendation engine.<p>Architecturally, this new Freenet is a global, decentralized key-value store where keys are webassembly contracts which define what values (aka &quot;state&quot;) are valid for that key, how or when the values can be mutated, and how the state can be efficiently synchronized between peers.<p>We&#x27;ve developed a unique (AFAIK) solution to the consistency problem, every contract must define a &quot;merge&quot; operation for the contract&#x27;s associated state. This operation must be commutative, meaning that you can merge multiple states in any order and you&#x27;ll get the same end result.<p>This approach allows state updates to spread through the network like a virus[2], which typically achieves consistent global state in a few seconds or less.<p>Like the world wide web, Freenet applications can be downloaded from the network itself and run in a web browser - similar to single-page apps on the normal web. However, rather than connecting back to an API running in a datacenter, the webapp connects locally to the Freenet peer and interacts with Freenet contracts and delegates over a local websocket connection.<p>If you&#x27;d like to try Freenet we have convenient installers for the major desktop OSs but not yet mobile, and you can be chatting with other users on River within seconds[3]. Happy to answer any questions, you&#x27;re also welcome to read our FAQ[4], or watch a talk I gave back in March[5].<p>[1] <a href="https:&#x2F;&#x2F;github.com&#x2F;freenet&#x2F;river" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;freenet&#x2F;river</a><p>[2] <a href="https:&#x2F;&#x2F;freenet.org&#x2F;about&#x2F;news&#x2F;summary-delta-sync&#x2F;" rel="nofollow">https:&#x2F;&#x2F;freenet.org&#x2F;about&#x2F;news&#x2F;summary-delta-sync&#x2F;</a><p>[3] <a href="https:&#x2F;&#x2F;freenet.org&#x2F;quickstart&#x2F;" rel="nofollow">https:&#x2F;&#x2F;freenet.org&#x2F;quickstart&#x2F;</a><p>[4] <a href="https:&#x2F;&#x2F;freenet.org&#x2F;faq&#x2F;" rel="nofollow">https:&#x2F;&#x2F;freenet.org&#x2F;faq&#x2F;</a><p>[5] <a href="https:&#x2F;&#x2F;youtu.be&#x2F;3SxNBz1VTE0" rel="nofollow">https:&#x2F;&#x2F;youtu.be&#x2F;3SxNBz1VTE0</a>

[Other] Show HN: I Made a Claude Skill for Spec-Driven Development (SDD) At my work they provided a single Claude subscription for everyone on the team. To be honest I like kiro better as it provides a way better SDD management. But the company can&#x27;t provide it and I can&#x27;t afford it yet. Turns out I had the skill creator skill in my claude instance so I made use of it to create this Skill. I made it fully by using Claude but I wanted to make it open source, so I asked it to help me make tests and preparations for it, even a CI to run python tests.<p>Well, we got this results with it:<p>- Phase 2A: 67 static assertions (Python script, runs in CI)<p>- Phase 2B: 15 behavioral tests (live Claude Code session)<p>- Phase 2C: 53 generation quality checks across 3 end-to-end flows<p>All of these passed and the CI also passed (after a few tries).<p>I made it to suit my way of prompting and coding and based it off kiro&#x27;s SDD management, but I want it to be publicly available and used by many people. According to claude some of the testers need to fit the following criteria:<p>1. Developer starting a real new project from scratch<p>2. Solo dev with an active side project (greenfield or partial codebase)<p>3. Team lead whose team uses multiple AI tools<p>4. Developer with an existing codebase and no written specs<p>5. Developer who actively uses 3+ AI coding tools<p>It&#x27;s actually a blind test, no guiding, just try it if you can, I&#x27;d really appreciate your help.<p>The repo is here: <a href="https:&#x2F;&#x2F;github.com&#x2F;FredAntB&#x2F;Spec-Driven-Development" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;FredAntB&#x2F;Spec-Driven-Development</a>

[Other] Graphs that teach > graphs that impress. Turn any code into an interactive knowledge graph you can explore, search, and ask questions about. Works with Claude Code, Codex, Cursor, Copilot, Gemini CLI, and more.