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AI agents win at Slay the Spire 2 after researchers replace growing chat logs with structured memory

Researchers developed AgenticSTS, an AI agent that uses five separate memory layers to play Slay the Spire 2, keeping prompts at around 5,000 tokens instead of ballooning past 500,000. The agent won 6 out of 10 games, while competing agents won none, demonstrating the effectiveness of structured memory over growing chat logs.

read1 min views1 publishedJul 12, 2026

The AgenticSTS project replaces the ever-growing chat log of AI agents with five separate memory layers. Tested on the card game Slay the Spire 2, the prompt stays at around 5,000 tokens instead of ballooning past 500,000. The agent wins 6 out of 10 games, while competing agents don't win any.

The article AI agents win at Slay the Spire 2 after researchers replace growing chat logs with structured memory appeared first on The Decoder.

source & further reading
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