Viv: An Engine for Emergent Narrative (monorepo)

https://github.com/siftystudio/viv

Read at commit 469cc46e6370f8021ca0e5f9b1cc67c05b61bc76, including the docs/ source for the introduction, tour, history, and full language reference. Open beta, components in 0.x, more than 1,000 tests in CI; a single JavaScript runtime ships and a C# runtime for Unity is planned; compiler on PyPI, runtime on npm; history page traces Viv from the Hennepin engine of the 2018 thesis through Esper at Hexagram to the 2025-2026 public rewrite.

Story sifting with causal bookkeeping