---
title: "Blog — Simon Mersich"
description: "Notes on code, AI, and things I'm building."
canonical: https://simon.mersich.net/blog
language: en
---

# Blog — Simon Mersich

> Notes on code, AI, and things I'm building.

Every post below links to its markdown source. The HTML lives at the same URL
without the `.md` suffix, and the Spanish translation at `/es/blog/<slug>`.

## Writing

- 2026-07-31 — [We still send .env files over chat](https://simon.mersich.net/blog/hush-encrypted-secrets.md): Every tool for sharing secrets asks you to give something up: an account, a server, a runtime, or a per-seat bill. So I built hush.
- 2026-07-18 — [Rebuilding my site with SvelteKit](https://simon.mersich.net/blog/rebuilding-my-site.md): From a Next.js template with a design system to a handful of hand-written files.
- 2026-06-25 — [C3PO, part 2: a real agent and a chat interface](https://simon.mersich.net/blog/c3po-2-chat-interface.md): From a Claude Code hack to a proper agent in the backend, with a chat interface for the robot.
- 2026-05-16 — [C3PO, part 1: Claude Code drives a robot in Isaac Sim](https://simon.mersich.net/blog/c3po-1-isaac-sim.md): Introducing C3PO, a project to give Claude a body. It starts with an MCP server and a simulated Unitree G1.

---

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