---
license: cc-by-4.0
tags:
- modelfarm
- persona
- interpretability
- evaluation
---

# ModelFarm · persona-stack controls

The control corpora and the persona-stack judge definition used by every
ModelFarm model card. Include these numbers' provenance with any card:

- `control_neutral.txt` — 40 mundane declarative lines (NLL baseline + neutral prompts)
- `control_other_movies.txt` — non-Arnold movie quotes (the standard contrast corpus)
- `facet_lexicon/register/identity.txt` — the Arnold facet slices
- `judge.json` — exact catchphrase list, identity regexes, imperative starts,
  intensity words, and scoring formulas

Usage with the lab: `python persona_lab.py engram --contrast neutral`, etc.
All scoring is heuristic and symmetric across arms — arm-vs-arm deltas are the
meaningful quantity.