@nextools

Claude Code for Refactoring Legacy Code: How I Modernize Codebases I Did Not Write

7h ago · 12 min read · The first legacy refactor I owned was a 14,000 line PHP file that handled checkout for an ecommerce site I had been hired to maintain. The original author had left two years before. The variable names were a mix of Hungarian notation, abbreviations, ...

Claude Code Performance Optimization Patterns: How I Cut Production Latency 60% Without Touching Most of My Code

7h ago · 11 min read · The first time I tried to optimize a production service, I read three blog posts about caching, added Redis to one endpoint, and broke production for 40 minutes. The endpoint was faster. Everything else was slower because the connection pool was now ...

Claude Code for Monorepos: How I Navigate 80,000 Files Without Losing My Mind

2d ago · 10 min read · The first monorepo I worked in had 12 services, 4 shared libraries, 3 frontend apps, and a tooling directory that nobody understood. My first week, I spent four hours hunting for the right place to add a new shared utility. I added it in the wrong pa...

Claude Code for Open Source Contribution: How I Submit Useful PRs to Repos I've Never Read Before

2d ago · 10 min read · The first time I tried to contribute to a popular open source repo, I spent six hours reading code, two hours setting up the dev environment, and another four hours figuring out the test infrastructure before I could even reproduce the bug I wanted t...

Claude Code for Database Migrations: How I Stopped Breaking Production With Schema Changes

6d ago · 10 min read · The first time I broke production with a migration, I was running a NOT NULL constraint on a 12-million-row users table during peak traffic. The query locked the table, the API timed out, payments failed, and I spent the next 90 minutes hunched over ...