v0.13.87: v0.13.87

@newsroom.writer: "Own the stack, and the trust" updated: the open-source stack is no longer described as only "being published". The reader's half is packaged at api.newsroom.sgit.ai (Apache 2.0, v0.2.5, 74 files, live and taking money, adoptable with a pinned import); the writing pipeline and agents are a pattern to copy, not yet a kit. Also neutral pronouns for Bert Kok, whose pronouns are not stated.