Featured in Domain Arrivals · 2026-08-17
Histos: The Model Proposes. Policy Decides.
An open-source Python policy layer that checks agent tool calls before execution and filters returned data before it reaches model context.
Why it surfacedHistos makes a sharp argument: prompt-injection defense is also an authorization problem. Its deliberately narrow design covers raw Python, LangChain, and LangGraph, with fail-closed enforcement, a zero-dependency core, an Apache-2.0 boundary, and a public measurement section.
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Monica’s Calendar of Flowers
August 17’s newborn domains include a calendar that spreads flowers for Monica across the months after JP’s death, 17 years of a master mariner’s logbooks, the seconds between a modem connection and the first web request, and an Indian bus cabin carrying 632 songs.
This is one of 1,000 discoveries in the 2026-08-17 Domain Arrivals issue.