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Why are we so obsessed with lawns?

2026-06-26 @ 03:35:49Points: 19Comments: 23

Libre Barcode Project

2026-06-26 @ 03:12:42Points: 115Comments: 9

What happened after 2k people tried to hack my AI assistant

2026-06-26 @ 02:29:23Points: 114Comments: 44

Framework's 10G Ethernet module exposes USB-C's complexity

2026-06-26 @ 01:10:52Points: 143Comments: 71

The Garbage Collection Handbook: The Art of Automatic Memory Management (2nd Ed) (2023)

2026-06-25 @ 23:10:30Points: 126Comments: 17

The 'papers, please' era of the internet will decimate your privacy

2026-06-25 @ 21:44:55Points: 649Comments: 302

Un-0: Generating Images with Coupled Oscillators

2026-06-25 @ 20:50:02Points: 142Comments: 33

Om Malik has died

2026-06-25 @ 20:33:37Points: 825Comments: 92

An oral history of Bank Python (2021)

2026-06-25 @ 20:14:35Points: 106Comments: 33

Parallel Parentheses Matching

2026-06-25 @ 20:12:24Points: 82Comments: 10

The Doorman's Fallacy in action

2026-06-25 @ 20:00:35Points: 102Comments: 143

Apple to skip high-end M6 Mac chips in favor of AI-focused M7 line

2026-06-25 @ 17:38:44Points: 235Comments: 194

Besimple AI (YC P25) Is Hiring

2026-06-25 @ 17:00:00Points: 1

Show HN: OpenKnowledge – open source AI-first alternative to Obsidian/Notion

2026-06-25 @ 16:04:46Points: 261Comments: 128

https://openknowledge.ai/), a “what you see is what you get” markdown editor that has direct integrations with Claude, Codex, and other agents. Available as MacOS app or Web UI+CLI. Fully free/local and OSS.

We built this because we wanted a Notion-like experience for writing and sharing markdown files across our team. Obsidian is the best alternative we tried, but found it doesn’t have a true WYSWIG UI and it didn’t integrate well with Claude/Codex outside of community plugins.

So we built OpenKnowledge. It takes shape as:

1. A MacOS app with a file navigator, the WYSIWYG editor, and link explorer.

2. Integrations with the Claude, Codex, and Cursor desktop apps. The agents can open an OpenKnowledge editor within their embedded web browsers for a side-by-side experience.

3. Built-in mcps, skills, and RAG for LLM-wiki and “AI Second Brain” scenarios + spec writing

4. An embedded terminal and CLI for TUI-first users

OSS stack includes: Tiptap/prosemirror, CodeMirror, yjs (CRDT), Electron (MacOS app), Orama, remark/rehype/micromark/mdast, @pierre/trees

On the architecture side, the interesting eng. challenges included:

1. A pipeline to convert ProseMirror to markdown in a bidirectional lossless way. ProseMirror uses ASTs, which are not designed to have byte-fidelity.

2. A dual-observer CRDT to keep the ProseMirror and markdown state in-sync.

The CRDT + git also power a collaborative experience that shows what Agents are doing in the markdown, have undo/redo, and version history. The “Share” and cloud-sync functionality are geared for team collaboration. They feel “no-code” but leverage git/GitHub under the hood, which also means data stays fully private.

In that spirit, we made OpenKnowledge open source for anybody who’s curious or who’d like to contribute.

We’re actively thinking about plugins/extensibility and what’s next. If you have suggestions or feedback, would love to hear it.

An entire Herculaneum scroll has been read for the first time

2026-06-25 @ 15:48:07Points: 1243Comments: 260

IBM debuts sub-1 nanometer chip technology

2026-06-25 @ 15:33:37Points: 308Comments: 165

OS9Map

2026-06-25 @ 15:01:06Points: 219Comments: 43

Zig's new bitCast semantics and LLVM back end improvements

2026-06-25 @ 14:19:28Points: 231Comments: 116

Apple raises prices of MacBooks, iPads

2026-06-25 @ 13:02:56Points: 701Comments: 1008

Hey Nico, you didn't vibe code your data room but stole it from Papermark

2026-06-25 @ 12:23:05Points: 301Comments: 125

You can't unit test for taste

2026-06-24 @ 08:54:12Points: 269Comments: 122

Record type inference for dummies

2026-06-23 @ 13:04:38Points: 37Comments: 1

A game where you're an OS and have to manage processes, memory and I/O events

2026-06-23 @ 09:35:26Points: 185Comments: 30

Eyewitness at the Triangle (1911)

2026-06-23 @ 00:53:58Points: 20Comments: 1

Oxide computer 3D rack guided tour

2026-06-22 @ 15:21:04Points: 356Comments: 141

The last Romans are still around

2026-06-22 @ 15:00:04Points: 81Comments: 98

Doing a masters while working in Spain

2026-06-22 @ 07:44:03Points: 36Comments: 9

Falcon GX the most powerful brand engineering tool

2026-06-21 @ 23:28:36Points: 5Comments: 1

Experiments in Sports Seismology for the World Cup

2026-06-21 @ 14:06:51Points: 20Comments: 1

Show HN: Chess-Inspired Roguelike

2026-06-21 @ 06:50:31Points: 274Comments: 93

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