Once you start writing more complicated apps that are hosted on a server using a database and you start having concerns about security and privacy and data protection, and especially if your codebase starts getting larger than a few thousand lines of code, you’ll want to install these skills.
Graphify
Graphify - AI coding assistant skill that indexes your codebase and produces a queryable knowledge graph. App code + database schema + infrastructure in one graph. Add a hook for Graphify to force Claude to read the knowledge graph before trying to read your codebase to save tokens.
Gstack by Garry Tan
Gstack by Garry Tan from Y Combinator turns Claude Code into a virtual engineering team — a CEO who rethinks the product, an engineering manager who locks architecture, a designer who catches AI slop, a reviewer who finds production bugs, a QA lead who opens a real browser, a security officer who runs OWASP + STRIDE audits, and a release engineer who ships the PR. Twenty-three specialists and eight power tools, all slash commands, all Markdown, all free, MIT license.
Installing npm packages from GitHub
If you don’t know how to install an npm package from GitHub, ask Claude Code or Codex to walk you through the steps.
Make sure you have a CLAUDE.md file similar to this saved in your hidden .claude folder in your user root folder before you start installing npm packages.
Note all the checks it does to make sure packages are safe.