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Hamza Hamidi

Software engineer. I build things, learn what I need, and go wherever the problem takes me.

I'm originally from Beni Mellal, Morocco but these days I live in Paris, France.

Bio

A little more about me.

I've always loved spending way too much time on the computer. I spent my teens tinkering with Photoshop, writing C/C++ code and building websites.

My curiosity led me to dig deep into the world of computer science, and I eventually decided to pursue a degree in the field.

At work I build backend and distributed systems at TheFork, mostly in TypeScript, Go and Python. I have spent other stretches on frontends, mobile apps and infrastructure. On my own time I maintain AJSF and prettier-eslint, and I build developer tooling: most recently Texaryn, a schema-driven UI runtime built with AI-generated interfaces in mind, and yoke, a Chrome extension and MCP server that lets an agent drive the browser you are already signed in to.

Now

TheFork.
Software engineer, in Paris.
yoke.
A Chrome extension and a local MCP server that drive the Chrome profile I am already signed in to, every tab in every window.
Publish to Chrome Web Store.
A GitHub Action on the Marketplace that publishes Chrome extensions through the store API v2 with no stored secret.
claude-in-chrome-cli.
A shell script that drives the Claude in Chrome extension, from Claude Code or from a plain shell.
AJSF.
Actively maintained. The package major follows the Angular major it targets, and the latest release is on Angular 22 and TypeScript 6. See the roadmap.

Code

The duct tape that keeps the world together!

Open source is the part of this work I've always enjoyed most, and the language changes with the project. Here are some of the ones I've contributed to:

AgentDust

Process ownership and approved cleanup for Claude Code.

My Mac was running hot, so I checked what my AI coding sessions had left behind. I found six old processes, all idle at 0% CPU. They did not explain the heat, but some still held ports. I wanted to see which session a helper belonged to before deciding whether to stop it.

AgentDust connects helpers to Claude Code sessions through an inherited marker and a local journal. Its read-only doctor explains the ownership evidence. Cleanup asks for my typed approval, then takes a fresh inventory, reclassifies the process and checks its identity before sending SIGTERM.

Built in Rust for Apple silicon macOS, with a CLI and an MCP server. The cleanup design documents the remaining PID reuse race and the choice to avoid process groups and escalation to SIGKILL.Read why I built it and how it works

Rust, MITCodeInstall with Homebrew

Texaryn

A schema-driven UI runtime, built with AI-generated interfaces in mind.

Texaryn grew out of my experience maintaining AJSF and exploring what AI needs to build interfaces. The idea is to let AI describe an interface as structured data, with a runtime responsible for state, validation and rendering. My work on AJSF shaped the foundation: schema-driven forms, with the schema logic separated from the UI framework.

Texaryn turns a JSON Schema into a form in React, Vue or a web component, with Bootstrap 5 and Material UI widget sets for React. It reads draft 7, 2019-09 and 2020-12, and the schema adapter runs against the official JSON Schema Test Suite. Its UI document is data, and the core has no dependency on a UI framework or an AI SDK. Dedicated AI generation tooling is still roadmap work.

TypeScript, Apache-2.0CodenpmPlayground

yoke

A Chrome extension and a local MCP server that let any MCP client drive the Chrome profile you are already signed in to. It addresses every tab in every window by id, reads pages, clicks and types, takes screenshots, and reads console and network activity.

It began as the tab-group helper split out of claude-in-chrome-cli. Your signed in sessions, cookies and extensions stay available, which is the reason to reach for it instead of starting a second browser. It addresses tabs by id rather than through a tab group, redacts URLs unless a call asks for them, and ships zero runtime dependencies. Since 0.1.4 each Chrome profile with the extension gets its own endpoint, so two profiles are both reachable and told apart.

TypeScript, MITCodenpmChrome Web Store

Browser Extension Publishing

GitHub Actions for publishing browser extensions to Chrome, Firefox and Edge.

Use one store action at a time, or publish the same release to all three through the composite action. Each store action handles its own API and release flow.

Chrome Web Store
Uses Workload Identity Federation for a short-lived token, with signed CRX uploads and partial rollouts. Yoke releases use this action. How it works.
Firefox Add-ons
Publishes listed or unlisted AMO versions with an API key pair, and can upload source archives or return the signed XPI.
Microsoft Edge Add-ons
Uses a Partner Center API key and client ID to upload the package and submit it for certification.
All stores
The composite action calls all three actions in one job and reports each store. That job holds every store credential; separate jobs keep credentials isolated by store.

GitHub Actions, MITCodeGitHub Marketplace

claude-in-chrome-cli

The Claude in Chrome extension tools, from a shell script.

One MCP bridge with two front doors: a plugin inside Claude Code, and cic for anything that can run a shell. It also lists every open tab by reading Chrome's session files, which the extension bridge cannot see.

JavaScript, MITCodenpm

Prettier-eslint

Runs Prettier over your code, then eslint --fix.

Formats your code with prettier, then hands it to eslint so the two stop disagreeing. I carried it through the ESLint 6 and Prettier 2 upgrades.

TypeScript, maintainerCode

cookies-utils

A typed cookie API over the Cookie Store API.

One async interface over both backends, with nothing to configure. Version 2 rejects the attribute combinations that are unsafe rather than merely wrong, covering SameSite, Secure, Partitioned (CHIPS) and the __Secure- and __Host- prefixes. Importing it never reads document, so it is safe in a server-rendered build.

TypeScript, MITCodenpm

Older work

Todo List

An Ionic todo app with shared notes, images and speech input.

An Ionic application. I used Firebase as a Back End. Todo List is available as a mobile application (Android, IOS, Windows phone), but also as a Progressive Web Application. Todo List has many features like sharing notes, upload images, Speech Recognition...

Contributions to the public repository are always welcome. I use Zenhub for project planning.

TypeScriptCodeLive Demo

Vulcan

A full-stack app framework on React, GraphQL and Meteor.

An open-source full-stack app framework based on React, GraphQL, Meteor, and MongoDB, with now more than 5000 stars and 150 contributors.

Code

RealWorld

One example application, implemented in every framework.

"The mother of all demo apps" an Exemplary fullstack Medium.com clone powered by React, Angular, Node, Django, and many more.

While most "todo" demos provide an excellent cursory glance at a framework's capabilities, they typically don't convey the knowledge & perspective required to actually build real applications with it.

RealWorld solves this by allowing you to choose any frontend (React, Angular 2, & more) and any backend (Node, Django, & more) and see how they power a real world, beautifully designed fullstack app called "Conduit"..

Code

etherpad-lite

Open source real-time collaborative document editing.

For those of you tired of using Google tools like Google docs ... then you're not the only ones! And if you want to do something about this! Here's the solution!

etherpad-lite is an open source real-time collaborative document editing.

Code

Open source

Changes accepted into projects I do not own.

Also iamkun/dayjs, kulshekhar/ts-jest, webpack/webpack.js.org, bgub/eta, AxaFrance/oidc-client, semantic-release/npm, json-schema-org/json-schema-org.github.io, AxaFrance/react-toolkit, AxaFrance/Skizzle, felixzapata/gulp-stubby-server.

Bug reports

Not every fix starts as a pull request.

Bugs I reported in projects I do not own. The maintainers confirmed each one as a bug and closed it as done.

Every issue I have opened elsewhere

Writing

Like coding, but without all the errors.

All notesMore on MediumMore on dev.to

Say hello

Get in touch through GitHub, LinkedIn or X. I write here, on Medium and on dev.to.