Marginalia Search ships NSFW filter

This is the right kind of boring: a moderation feature engineered for search latency and low base rates, not benchmark theater.

• –HN reaction was predictably split between curiosity and skepticism, with the maintainer framing the feature as useful for API consumers and anyone who wants safer defaults.
• –The build pipeline is the real story: qwen3.5 and ollama bootstrap labels, fasttext got tried and rejected, then Marginalia settled on a hand-featured single-hidden-layer net.
• –The post is unusually candid about false positives and the risk of over-filtering legitimate terms, which matters more than raw accuracy in a search product.
• –Shipping on the API first is a smart rollout, because NSFW moderation needs real traffic before a UI switch can be trusted.
• –For developers, this is a good reminder that sometimes the best production model is the smallest one that still behaves acceptably.