Life & fun · February 11, 2025
Community Detection on Bluesky
We ran the Leuven community detection algorithm on popular users on Bluesky (where the graph has edges determined by Jaccard similarity of a users' followers). We identified 118 communities and based on the names and descriptions of the top 10-20 users had LLMs generate title and descriptions for them. There are communities like "Feline enthusiasts", "Web Professionals", a bunch of NSFW ones and quite many communities are many different flavors of progressive/liberal activists.
Community Detection on Bluesky launched on February 11, 2025 with 19 votes, #787 of 5,999 launches that month and more than 90% of that year's launches. The site was not reachable when checked in September 2026.
In plain words
Community Detection on Bluesky uses the Leuven algorithm to identify groups of users on Bluesky based on follower similarity patterns. The analysis discovered 118 communities across the platform, with AI-generated titles and descriptions for each group. Communities range from interest-based groups like feline enthusiasts and web professionals to various activist and niche communities. The tool provides a way to explore how users cluster together on the social network based on their follower networks.
written from the facts on this page · September 2026
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