X open-sources 'For You' recommendation algorithm, including ranking and safety filtering code
IgorBrigadir · x · 2026-08-15
X (formerly Twitter) has officially open-sourced the core code powering the "For You" feed on GitHub.
Key Components:
- Logic: Combines in-network content (follows) with out-of-network content (ML-based retrieval).
- Modules: Includes critical services like home-mixer, phoenix-rankall (ranking), simclusters (similarity), and visibility-filtering.
- Safety: Contains safety enforcement and adult content filtering systems.
Impact:
- The repository will receive ongoing updates, allowing developers to trace algorithmic changes in real-time.
- Provides a valuable reference for RecSys practitioners studying large-scale social recommendation architectures.
Related event: X Open Sources 'For You' Algorithm(16 posts)→
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