Apache Ossie standardizes semantic models so agents stop computing the same KPI three ways.

apache/ossie (1,642 stars, +423 this week) entered incubation under a new name, formerly Open Semantic Interchange (GitHub). It targets the failure where identical KPIs are defined differently per tool and AI systems then produce unreliable output from inconsistent business logic. Ships a JSON/YAML spec, reference converters for dbt, GoodData, Polaris, and Salesforce, validation tooling, and example models including a full TPC-DS dataset. If you're pointing agents at a warehouse this is the missing contract layer, though incubating status and 1.6K stars mean it's early.