Show HN: Lean4 Datalog DSL Based on Google Zanzibar for AI Projects

A developer on Hacker News released a Lean4 datalog DSL for building and versioning knowledge bases. It's inspired by how Google Zanzibar—Google's permission system—uses datalog to describe relationships between concepts. The new tool lets you construct knowledge bases directly in Lean4, store them in git, and improve them without relying on external engines or infrastructure.

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