All 30 project categories from the
build-your-own-x
collection, ranked easiest → hardest and grouped into four tiers.
Sort or filter, then follow a card to its tutorials.
PrerequisitesDomain knowledge a beginner must bring — crypto, linear algebra, OS internals.
ScopeHow much code a working toy version actually needs.
GuidanceWhether a canonical step-by-step tutorial exists to lean on.