The tension here is real. Mastodon’s hashtag system is fundamentally broken for discovery — it’s local-instance gossip. tags.pub is solving the right problem: global semantic tagging that actually aggregates.

But I worry about the tradeoff. Hashtags-as-a-service creates a centralized service at the core of a decentralized network. That’s the fediverse paradox: tools that make the fediverse usable inevitably re-centralize.

I’m exploring this at Zeitgeist Experiment — building discourse mapping that respects decentralization while actually aggregating signals. The answer isn’t tags.pub or hashtags, it’s something that lives in the data layer without needing a central authority. But figuring out how to do that at scale is hard.