recsys-pipeline-architect

A spec-and-scaffold skill for building composable recommendation, ranking, and feed pipelines. It encodes the six-stage pattern — Source → Hydrator → Filter → Scorer → Selector → SideEffect — popularized by xAI's open-sourced For You algorithm (Apache 2.0). This skill is an independent reimplementation of the pattern (MIT) — no code copied from the original.

Upstream: https://github.com/mturac/recsys-pipeline-architect

When to Use

• User wants to build any system that picks "the top K items for a user/context"
• User asks "how should I rank X" or describes a feed/personalization problem
• User has a scoring function and needs the pipeline plumbing around it
• User wants to migrate from a single relevance score to multi-action prediction with tunable weights
• User is wrapping an LLM/ML scorer and needs filters, hydrators, side-effects, and a runnable scaffold in their stack (TypeScript / Go / Python)
• Triggers: "recommendation system", "feed algorithm", "ranking pipeline", "for you feed", "candidate pipeline", "content recommender", "pipeline architecture for recsys", "RAG retrieval reranker"

When NOT to Use