OpenAI's Automated Interpretability from paper "Language models can explain neurons in language models". Modified by Johnny Lin to add new models/context windows.
The neuron detects sentence boundaries / sentence-level shifts (it activates strongly on sentence-start tokens and on punctuation marking ends or major breaks).
Mentions of meetings or planned meetings between political leaders or high‑level officials (words/phrases like "meet", "met", "planning to meet", "counterpart", leader names).
code snippets that declare or reference data types and typed fields (e.g., primitive types, enums, string/number fields) within method signatures and data schemas.