Learn how to design large-scale systems. Prep for the system design interview. Includes Anki flashcards.

Primer is GitHub's design system. This is the CSS implementation

An implementation of GitHub's Primer Design System using React

ViewComponents for the Primer Design System

Color, typography, and spacing primitives in json.

A Claude Code/Codex skill that audits design systems with a health score, receipts, prioritized fixes, and generated rules to prevent regressions.

multiPrime is a mismatch-tolerant minimal primer set design tool for large and diverse sequences (e.g. Virus). Here is a web-based version (test: http://multiPrime.cn)

Learn how to design and implement effective Machine Learning systems from start to finish.

Use when the user wants to deeply learn a new topic from scratch. Runs a pre-interview (current knowledge, end-goal proficiency, depth, practice load, background, scope), researches online (articles, niche-influencer blogs, canonical docs, subtopic landscape), then produces a structured markdown course with mandatory visual diagrams, evidence-based learning-science features (retrieval practice, spaced callbacks, worked-example fading, concept ledger, jargon gate, analogy hygiene), and a self-contained interactive HTML mini-course. Triggers on /teach-me, "teach me about X", "I want to learn X", "deep dive on X", "create a course on X", "study X with me".