3xo-suit

Best practices when developing in Crystal codebases

Best practices when developing in Go codebases

Write an Architecture Decision Record (ADR) — lead with the decision, give neutral context, and state consequences both ways. Use when recording an architectural or technical decision, documenting why a choice was made, or capturing tradeoffs for future maintainers.

Write essays, blog posts, newsletters, and opinion pieces in a personal first-person voice — concrete cold open, argument by historical analogy, deliberate sentence rhythm, aphoristic kicker. Use when drafting or editing personal essays, blog posts, op-eds, newsletter issues, or any first-person long-form meant to persuade or reflect.

Write an RFC or design doc — summary-first, with goals/non-goals, real alternatives, drawbacks, and open questions. Use when proposing a technical change for review, writing a design doc, or documenting a system or feature proposal before building it.

Write clear technical documents — design docs, PR descriptions, proposals, postmortems — that lead with the decision and ground every claim in specifics. Use when drafting or editing workplace technical writing where a reader must act or later understand why. For the specific RFC and ADR formats, use writing-rfc and writing-adr.

Python development guidelines and best practices. Use when working with Python code.

Best practices when developing in Ruby codebases

Create distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, or applications. Generates creative, polished code that avoids generic AI aesthetics.

Extract clean article content from URLs (blog posts, articles, tutorials). Use when user wants to download, extract, or save an article/blog post from a URL without ads, navigation, or clutter.

Finding files on Linux and macOS machines