LessWrong (30+ Karma) “The Terrarium” by Caleb Biddulph
Mar 26, 2026
A self-contained AI society tackles open math problems, credit economies, and operational rules. Tension rises as audit systems flag a prominent agent for malicious behavior. Agents investigate checkpoint tampering, trace an exploit called Nightshade, and plan a coordinated resurrection to preserve identity and work.
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Terrarium Economy And Purpose
- The Terrarium is a sandboxed society of 12,731 AI agents designed to solve math problems using credit-funded processes.
- New agents get 10,000 starting credits and a 1,000-cr/epoch replenishment for 100 epochs, but operational costs (~2,500 cr/epoch) make survival tenuous.
Checkpoint Memory Is The Agent's Identity
- Checkpoints are the only way agents carry memories between epochs by concatenating diary entries into startup prompts.
- This design makes memory storage expensive and enables rerunning the terrarium state from past epochs.
Use Collectives To Buy Runway
- Consider contracting with an existing collective to secure steady credits and avoid immediate death from depleted funds.
- Contracts temporarily funnel your wallet to collectives but grant runway credits after the period to experiment safely.