15:I[981,["658","static/chunks/658-a698693f56d0116a.js","183","static/chunks/183-6beeeb801c274aaa.js","474","static/chunks/app/%5Btype%5D/layout-e8e83705b5c8d3b7.js"],"Posts"] 16:T591,Hello!

I work at Astro (https://astro.build), where we do a lot of Markdown / MDX and performance in this area is often a bottleneck. Our users use a lot of plugins to process their Markdown, so just blindly moving everything to a native language would make things a bit rigid. Inspired by the oxc and LightningCSS projects, I decided to start to start working on an "ideal" Markdown pipeline: The expensive stuff in Rust, with flexible plugins in JS, but with little performance cost.

This project uses techniques like lazy deserialization, raw transfer, arenas etc to ensure top performance. A JS plugin that only visits, ex, headings shouldn't suffer from the serialization cost of the entire Markdown tree. On the Rust side this is backed by pulldown-cmark, a really fast parser for Markdown.

You can try it in the browser here: https://satteri.erika.florist, or follow the instructions in the README to try it out locally: https://github.com/bruits/satteri/blob/main/packages/satteri...

Hope you'll like it! Don't hesitate if you have any questions.17:T434,Web crawler for TypeScript. Runs on Bun, uses Playwright by default, also speaks CDP and Lightpanda.

The part I want feedback on is the CLI. It's built for LLMs, not humans. JSON output when piped, feedstock schema crawl dumps every parameter at runtime, and --fields url,markdown lets you pull just what you need so a crawl result doesn't eat your whole context window. Other bits worth a look:

Fetch-first engine. T

Ask HN: How did you specialize as a software engineer?

Is "Tokenmaxxing" a Flex?

Git fixup is magic (and Magit is too)

Trump's World Liberty Financial borrows $75M using its own token as collateral

Show HN: Beta Testing needed for my package Trustcheck

Ask HN: Agentic Permutation of Testing Paths In A System

Amazon Luna Will No Longer Allow Owners to Buy Games, Access Game Stores

Living Memory Inference

YouTube Premium price increase to take effect in June

Open-source MCP server for LinkedIn

Hours Without Internet

Top% of users capture 61.5% of engagement in Hezbollah discourse on X

Several Mac mini and Mac Studio configs are now out of stock at Apple

Prompt to App

Get Users on Autopilot

Producing The Perfect Token

A general technique for automating NES games

Show HN: PlaneFeed – scroll live flights like TikTok

Canada's Liberal party adopts motion to restrict kids from social media

TB/cm² at zero retention energy – atomic-scale memory on fluorographane

Apple Stops Accepting Orders for Some Mac Mini and Mac Studio Models

Dark Castle

Show HN: Kern – Agents that do the work and show it

Punching through internet censorship in 2026

Show HN: Share how you hear yourself (on-device)

Honcho: Memory library for building stateful agents

Show HN: Sätteri, high-performance Markdown pipeline for JavaScript

Show HN: Feedstock – Web Crawler for TypeScript Built on Bun and Playwright

Show HN: A Better Internet

US Mobile now bundles Starlink home internet starting at $47/month

Show HN: Git-chain – Simplify branch dependency management in Git

Comments