# Fitness Functions / Rule Maintenance

> "fitness-functions" (evolution-principles layer) is traded against "Rule Maintenance" (evolution-principles layer) — a principle cannot be scope-separated from a quality, metric, or cost it competes with; resolve by measuring "Rule Maintenance" and choosing an explicit operating point.

Record: `tension:fitness-functions-rule-maintenance`
Kind: tension
Canonical: https://banes-lab.com/ontology/schema#tension-fitness-functions-rule-maintenance

## tensions-with

- [Fitness Functions](https://banes-lab.com/records/arch/fitness-functions.md)
- [Rule Maintenance](https://banes-lab.com/records/lex/rule-maintenance.md)