x-algorithm/phoenix/recsys_retrieval_model.py at main · xai-org/x-algorithm

Algorithm powering the For You feed on X. Contribute to xai-org/x-algorithm development by creating an account on GitHub.

This repository contains the core code that determines which posts a viewer sees in the For You feed on X. It combines in-network content (from accounts the viewer follows) with out-of-network content (discovered through ML-based retrieval and other mechanisms), filters content based on a variety of inputs, and ranks posts using a transformer model. Table of Contents Notable Updates August 14th, 2026 August 13th, 2026 Overview System Architecture Request Path Labeling Path Components How It Works Scoring and Ranking Filtering Experiments and Configuration What's not in this…

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• Yushan Li

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