What is x-algo?

x-algo is a skill for Claude that helps you improve content on X (formerly Twitter) using the platform's actual ranking logic rather than general social media advice. It is grounded in the published source code from xai-org/x-algorithm, which is the scoring formula X uses to decide which posts appear in the For You feed. The skill has two modes. In audit mode, you paste a post and describe your goal, and the skill returns a signal-by-signal breakdown of how that post performs according to X's ranking formula, followed by a rewritten version optimized for your goal. Supported goals include buyers (conversions or leads), impressions (maximising reach), shares, saves, reposts and quotes, and gaining followers. In ideate mode, you provide a topic or some source material and the skill generates a ranked list of content ideas designed to activate the signals that matter for your chosen goal. Every recommendation maps back to specific signals in X's WeightedScorer, the component that assigns a numeric score to each post. This covers 17 positive signals such as favorites, replies, quotes, profile clicks, dwell time, and shares via direct message, as well as 5 negative signals such as reports and mutes. The skill also accounts for the Author Diversity multiplier, which penalizes burst posting, and the out-of-network weight factor governing how posts spread beyond existing followers. The skill explicitly avoids recommendations not supported by the published formula, including hashtag advice (not a ranking signal) and time-of-posting tactics. Install it by dropping the x-algo directory into your Claude skills folder.