I'm Sébastien, aka Plopix, I live in California, and I come from France. I am a passionate technologist, architect, and problem-solver who has gone all-in on AI: I build agentic systems that run in production, and I develop with agents every day. With a deep focus on scalability, performance, and system architecture, I orchestrate agentic workflows that multiply engineering output — combining agents, custom skills, MCP servers, and CLI tools to push the boundaries of what a team can ship.
This is my space to share my experience, projects, and thoughts on AI-driven engineering and the ever-evolving tech landscape. Welcome!
| 🕸️ Graph Engineering Agent pipelines designed as graphs: planner, parallel workers and reviewer nodes with shared state, branching, retries and human checkpoints. | |
| 🛠️ Custom Skills Authored agent skills like a /write-a-prd that generates structured PRD.json file for automated implementation. | 🔌 MCP Servers & CLI Tools Remote MCP servers to extend agent capabilities and CLI tools to streamline agentic workflows. |
| 🔔 Plugins Custom notification plugins that alert me when agents need attention, complete tasks, or hit blockers. | 🌳 Git Worktree Integration Agents work in isolated Git worktrees, enabling parallel development without branch conflicts. |
Operating as an AI-augmented engineering team — shipping faster, with higher quality, across more fronts.
| Missive.js Creator · Maintainer The Service Bus that you or your agent needed. Fully-typed Service Bus for Node.js fueled by fancy Middlewares, Envelopes and Stamps.   | Crystallize JS Api Client Creator · Maintainer Crystallize (Java|Type) script Client Provides simplifications and helpers to easily fetch data from your Crystallize tenant.   |
| CLIffhanger Creator · Maintainer Scripts to MCP Server tool in an instant. A CLI that runs your scripts and exposes them as tools through a built-in, extensible MCP server.  | Better Git Creator · Maintainer A better version of Git CLI During the "Better Hack" Hackathon at Y Combinator organized by Better Auth. The theme was to make something existing better, we chose Git and we built a wrapper around it to make some command AI-augmented!  |
🕰️ Legacy projects
- Nova eZ SEO Bundle — Optimized SEO management for eZ Platform
- eZ Launchpad — CLI tool to bootstrap an eZ Platform project Docker stack
- Nova eZ Slack Bundle — Drive your CMS with this complete Slack integration
- Nova eZ 2FA Bundle — Security first!
- Nova eZ Cloudinary Bundle — Images optimizations and manipulations by Cloudinary on top of variations
- Nova eZ Fastly Image Optimizer Bundle — Images optimizations and manipulations by Fastly on top of variations
- Nova eZ Protected Content Bundle — Protect contents via a simple password without changing the Content Type
- Plopix JS Console — A beautiful Console.log wrapper
| Endless Chess Founder · Spring 2026 Gamification layer for chess that turns the games you already play on Chess.com and Lichess into daily quests, streaks, XP, and rivalries. Cloudflare Vite Tailwind CSS Chess.com API Lichess API Plausible Analytics | Color Conquest Founder · Spring 2026 Browser-based, location-aware PvP game where players claim a permanent color identity and stake a real-world location, then battle for territory — winning absorbs an opponent's colors while losing drains your own. Cloudflare Vite Tailwind CSS Plausible Analytics |
| Shipwire Founder · March 2026 AI-powered tool that monitors GitHub repositories and delivers concise, automated digests of code changes to teams via Slack or Telegram on a customizable schedule. Cloudflare Hobo JS GitHub API Slack API Telegram Bot API Better Auth | Time Capsule Co-Founder with my brothers. · Christmas 2025 Digital time capsule platform that lets you lock messages, photos, and videos in the present to be revealed to yourself or loved ones at a chosen moment in the future. Hono JS Custom React Island Frontend using Vite plugins Cloudflare Better Auth Stripe |
| Miape Co-Founder with my wife and two teacher friends. · Summer 2025 Educational AI platform created by teachers for teachers, helping educators prepare teaching sequences, implement pedagogical differentiation, and strengthen student learning outcomes. Next.js OpenAI API MongoDB Fly.io | Ok Wallace Co-Founder with my French teacher wife. · November 2023, right after OpenAI released the first version of Assistant API. AI-powered educational platform that enables teachers to effortlessly create tailored and engaging assignments adapted to individual student learning styles and paces. Remix Run OpenAI API MongoDB Fly.io Vector search |
| 📝 Publications | 🎤 Talks & livestreams |
|---|---|
| How We Gave an AI Agent Our Codebase Without Giving It the Keys? Oct 2026 · Crystallize Build Your Crystallize Service API Like a Pro Sep 2025 · Crystallize Web Rendering Explained: SSR, CSR & SSG for High-Performance Sites Jan 2025 · Crystallize Subscriptions (API) Overview Nov 2024 · Crystallize | Beyond Chat: When AI streams React components! Your cart has ideas! Jun 2026 · React Norway 2026 · Rockefeller Oslo, Norway Build with Crystallize Using AI — Meet the MCP Server Mar 2026 · Crystallize Channel · Online I got interviewed by the NextDev.fm team! Mar 2025 · NextDev.fm · Youtube Channel How to build a MCP Server Mar 2025 · All Things Web · Youtube Channel |
| All publications → | All talks & livestreams → |
| AI & Agentic Tooling |     |
| Living on the Edge |       |
| Professional |     |
| The Basics |               |
🦕 Earlier stack
| My Previous Life - Up to the Late 2010s |        |
| Old School |       |
💯 More Stats
🎼 My Symfony Badges
