News Summary

• Boris Cherny's viral tweet showed how useful formal models can be in agentic coding.
• This post gives a practical introduction to what TLA+ is.
• We also look at how temporal specifications, modern proof systems and AI agents can fit together.
• The interesting question is not only whether an agent can write TLA+.
• It is what becomes possible once agents can move between specifications, proofs and real programs.
• Part of our work at Reasonable is training models to enable agents to do this, consistently, reliably, quickly.