Hamza Hamidi, software engineer building developer tools

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.
Texaryn.: Seven packages on npm, a playground and a docs site.
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.
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 22.1.0 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:

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-2.0Code Playground

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.

0.1.6 npm version of yoke-mcp

TypeScript, MITCode Chrome Web Store

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.

0.8.0 npm version

JavaScript, MITCode

AJSF (Angular Json Schema Form)

An Angular form, generated from a JSON schema.

Over 70 example schemas, each viewable with Material Design, PrimeNG, Bootstrap 3, 4 or 5, or with no formatting at all. It is an independent update to angular2-json-schema-form, and contributions are welcome.

TypeScript, MITCode Demo

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.

2.0.1 npm version

TypeScript, MITCode

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.

17 stars

TypeScriptCode Live Demo

angular-forum

A forum application built with Angular.

A forum application built with Angular, and the second most starred thing I wrote.

76 stars

TypeScriptCode Live

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.

microsoft/vscode Contributions
Fixed the keybinding hash so scan codes and simple keys stopped colliding. #173456
The editor many developers keep open while writing and debugging software.
facebook/docusaurus Contributions
Added the noIndex config option, so a site can ask crawlers to skip it. #3573
The documentation builder teams use when Markdown needs versions, search and a website.
prettier/prettier-eslint Contributions
Maintainer. Carried it through the ESLint 6 and Prettier 2 upgrades, and keyed the ESLint cache on the effective working directory. #337 #334 #1221
Runs prettier over your code, then eslint --fix.
cloudfoundry/stratos Contributions
Added French localisation, and the org and space columns to the application list. #1419 #2247
A web console for managing Cloud Foundry and Kubernetes.
realworld-apps/angular-realworld-example-app Contributions
Moved the project structure to Angular 6, and added the production build and CI. #114 #50 #98
An Angular blogging application used to compare framework implementations on a shared example.
zkat/make-fetch-happen Contributions
Fixed the crash on a proxy URL with no protocol. #61
The caching fetch that npm makes its requests with.

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.

npm/cli #3904
npm accepted a publish and then reported the package had no README. Fixed in npm 8.
webpack/webpack-cli #2003
webpack-cli rejected a configuration object as invalid when it was not.
swc-project/swc #3626
A namespace import compiled into a call to something that was not a function.
actions/setup-node #417
cache-hit reported true on a restored cache that was missing the dependencies.
aws/aws-sdk-js-v3 #3080
getObject reached the object body only through an internal stream buffer.

Every issue I have opened elsewhere

Writing

Like coding, but without all the errors.

Green by absence: five ways a pipeline reports success while doing nothing
Five CI steps that passed because nothing errored, not because the effect happened.
Fixing 503 Errors During Kubernetes Rollouts: Two Approaches
Why a rolling update drops requests, and the two ways out of it.
Add coverage to your Angular project CI
Wiring Travis CI and Codecov into an Angular project for automatic coverage reports.
Optimize React web apps with webpack-bundle-analyzer
Reading a bundle treemap, and what to do about what it shows.
Deploy Ionic application in GitHub using Travis-CI
Setting up Travis CI to build and deploy an Ionic app to GitHub Pages.
Theming your Angular application with Bootstrap SASS
Wiring Bootstrap SASS variables into an Angular build.

Say hello

Get in touch through GitHub, LinkedIn or X. Medium is where I write.

GitHub@hamzahamidi
LinkedInin/hamzahamidi
X@hamzahamidii
Medium@hamidihamza