02
Who are you, right now?
Before fetching any posts, the system builds a fresh picture of you: who you follow, what you’ve liked, replied to, shared, the topics you follow, even what was shown to you recently.
Like a barista who, before making your coffee, glances at what you usually order, what mood you seem to be in, and what you tried last week.
Under the hood: These are query hydrators — small pieces of code that each fetch one slice of context in parallel. home-mixer/query_hydrators/
A little deeper
Each hydrator fetches one piece of context: followed topics, starter packs, impression bloom filters (so the same post doesn’t haunt you), mutual follow graph, served history.
The big shift is that there are no hand-engineered “features” here. The model receives your raw engagement sequence and learns relevance from it directly.
View on GitHub →Made by Henrique Martins