BREAKING: @typesafeai Jev speedruns Slay the Spire 2!

@node_jz Jeremy · Sep 21, 2026 · case #855647 · listed via Jev Hub

Still from the clip posted with this case; watch it in the original post on X.

Ran 500+ Jev decisions at $0.07 to play through Act I of Slay the Spire 2 with a custom Jev-only harness and no helper LLMs.

The original post

🤖 BREAKING: @typesafeai Jev speedruns Slay the Spire 2! 500+ Jev decisions ($0.07) to play through Act I. Custom Jev-only harness, no helper LLMs. Jev plays real Slay the Spire 2 with the headless https:// github.com/wuhao21/sts2-c li … All clips are real-time, not sped up at all 🧵.

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Numbers are a snapshot taken from X when the case was added to the library (schema v1, collected 2026-09-19); they will not match today.

Where this case fits

Filed under coding & developer tools. In the pattern Jev is built for, the model answers a bounded question per step — and ordinary code acts on the answer, because the answer is already a value rather than a paragraph. Other posts in the same family are on the coding & developer tools page.

🛠️ Coding & developer tools