Hi! 👋

I'm Horacio Herrera, a product-minded frontend engineer and designer from Panama 🇵🇦, based in Barcelona.

I build rich-text editors, local-first apps, and collaborative publishing tools. I'm currently building Seed Hypermedia, a desktop and web platform for decentralized knowledge collaboration — combining fine-grained linking, embedding, cryptographic authorship, and community-controlled publishing.

My work sits at the intersection of product design, frontend architecture, and open-source software. I've contributed to editor ecosystems like Plate and BlockNote, and I care deeply about tools that help people write, publish, discuss, and organize knowledge.

You can find me in X, Bluesky, Youtube or email

Latest Short Posts

State machines to visualize the work of agents

This post argues that state machines are key to making LLM-driven agent work more deterministic and visualizable.

Notes about how the document machine should work

some unstructured ideas I shared with my coding agent to make sure the document machine is more robust and comply with our needs

Pure CSS Scroll Shadows

No JS, No Observers, No State

What I want for the commenting experience to be

The commenting system in Seed is very important and it needs to be perfect. here are the list I believe would help to make it happen.

Remodeling the web

This short post shares a PDF deck with insights on the current state of the internet, along with links to related Seed Hypermedia resources on remodeling the web.

Vibe code like a PRO

Horacio shares an AI dev task tool discovered from a GitHub repo and video, envisioning a workflow where background agents autonomously resolve Linear issues and create pull requests.

Last Writings

Deploy a Seed Site From Your Own Fork

Make your Seed site truly yours

Graduated Trust: A Web-of-Trust Proposal for Open Source in the AI Era

A proposal for re-establishing costly trust signals in open source contribution, using social-graph distance as the basis for adaptive contribution friction.

Pairing serif & sans-serif for headings vs body — does it actually help reading?

Research summary on whether using different font families for headings (e.g. sans-serif) and body text (e.g. serif), or vice versa, improves the reading experience.

Velopack: Delta Updates for Electron Apps (and Why You Might Not Need Them Yet)

Cómo cuidar tu kimono blanco de JiuJitsu (gi) y mantenerlo como nuevo

Codesign your Electron Application for Windows

Horacio's Librarian