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[Other] Show HN: Geomatic – a command-driven geometry studio enabled with autodiff All commands have the format `output = \func inputs` or just `\function inputs`. Points and scalars are built on the fly. Eg `\line a b` to an empty canvas creates points `a` and `b`, and joins them with a line.<p>One can use broadcasting semantics similar to NumPy and PyTorch in a visual setting (imagine creating a list of circles where one dim corresponds to radius and another to the center). One can also use backpropagation, run gradient descent or visualize vector fields. Almost everything is reactive so changing a variable updates all of the downstream geometry. It also allows anyone to write and load their own visualization, which can be broadcasted and differentiated through.

[Other] Defeating Git Rigour Fatigue with Jujutsu

[Other] DeepSeek reasonix, DeepSeek native coding agent with high caching and low cost Related ongoing thread:<p><i>DeepSeek makes the V4 Pro price discount permanent</i> - <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=48237663">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=48237663</a> - May 2026 (384 comments)

[Other] Constraint Decay: The Fragility of LLM Agents in Back End Code Generation

[CLI Tool] Show HN: Kanban CLI (A local-first, agent-first task manager for the terminal) Hello HN,<p>Ever since agents have become increasingly common in development, I&#x27;ve been scratching my head as to how to control their randomness. Recently, I decided to emulate an issue-tracking and project-management tool for agent-driven workflows.<p>Kanban is a Rust-based coordination layer designed to provide a feature-rich terminal interface and enforce rigorous workflows. It aims to be versatile and extendable, made to be tailored to any preferred flow. It comes with full git integration and guardrails such that only what truly benefits a project can go through.<p>The workflow boils down to 4 steps:<p>1. The model reads the skill to contextualize the requirements<p>2. It authenticates and receives a strict, schema-validated JSON payload outlining exact files, context, and acceptance criteria<p>3. Implementation is performed within an automatically isolated Git worktree and branch. The tool tracks progress (e.g., verifying all files were edited) before the task is submitted for review<p>4. A reviewer (preferably a human) evaluates the submission and manually transitions the task to &quot;Done,&quot; which triggers the final merge and cleans up the task-specific environment.<p>The tool significantly decreases the agent development time, while increasing the human planning phase.<p>There is more to it than I can cover here, so I&#x27;d be happy to answer any questions about the architecture, the workflow, or the insights I gained while using it. For more information, I recommend skimming the README, which acts as an index to all documentation files.<p>Repo: <a href="https:&#x2F;&#x2F;codeberg.org&#x2F;hydrafog&#x2F;kanban" rel="nofollow">https:&#x2F;&#x2F;codeberg.org&#x2F;hydrafog&#x2F;kanban</a>

[Other] Mastering Dyalog APL

[Other] Microsoft open-sources "the earliest DOS source code discovered to date" <a href="https:&#x2F;&#x2F;opensource.microsoft.com&#x2F;blog&#x2F;2026&#x2F;04&#x2F;28&#x2F;continuing-the-story-of-early-dos-development&#x2F;" rel="nofollow">https:&#x2F;&#x2F;opensource.microsoft.com&#x2F;blog&#x2F;2026&#x2F;04&#x2F;28&#x2F;continuing-...</a>

[API/SDK] API proposed by Chrome: Declarative partial updates

[Other] Reverse engineering circuitry in a Spacelab computer from 1980

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

[Other] 80386 Microcode Disassembled

[Other] Electrobun 2.0 will be decoupled from Bun due to the Rust rewrite <a href="https:&#x2F;&#x2F;xcancel.com&#x2F;YoavCodes&#x2F;status&#x2F;2058064720553222567" rel="nofollow">https:&#x2F;&#x2F;xcancel.com&#x2F;YoavCodes&#x2F;status&#x2F;2058064720553222567</a>

[Other] Making deep learning go brrrr from first principles (2022)

[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

[Other] I Bypassed Adobe and Microsoft to Build a Git-Tracked Book Production Pipeline

[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.