crystalhansen

Discussions on code language development and projects associated with it.

Building Sovereign Social Automation with Meta's System Users

A technical guide on bypassing session flakes using Meta System Users for multi-tenant SaaS.

3 min read · 2026

React Login Series - Building a Login Feature | 7 Part Series

A production-style authentication system built with React, Tailwind, using localStorage, API abstraction, and full testing coverage.

6 min read · 2025

Building a Studio Booking App

Ever want to build a booking app and see what is under the hood of such a system?

4 min read · 2025

What Git Never Explains -- Stacked Branches & Merge Order

Github how to on merging branches commits with multiple branch history

5 min read · January 26, 2026

2026 · git git-rebase git-stash git-branch github devops · github-posts devops-posts
Why Branch Discipline in Git Isn’t Optional (And How It Saved This Auth Refactor)

This Post describes the use of git to manage two branches of ongoing work and how to do it.

6 min read · January 20, 2026

2026 · git git-rebase git-stash git-branch github devops · github-posts devops-posts
React Login Series - Testing the Login Feature (RTL + Jest) | Part 6

Part 6 in our Login Series covers the tesing aspect of our login features using RTL + Jset to ensure security and code functions as expected.

13 min read · January 20, 2026

2026 · react login authentication auth UI testing rtl jest · react-posts auth react-login-series testing-posts
React Login Series - Auth Context Cookie Auth | Part 5b

Part 5 of this series walks through the authentication context using cookies vs session persistence.

7 min read · January 10, 2026

2026 · react login authentication auth UI Cookies · react-posts auth react-login-series
React Login Series - Auth Context Session, Persistence & Logout | Part 5

Part 5 of this series walks through the authentication context, session state, persistence and login/logout functionality.

7 min read · January 10, 2026

2026 · react login authentication auth UI · react-posts auth react-login-series