# Fin Effectiveness Model

> Fin effectiveness model

- Skill: `sapientinc/fin-effectiveness-model` (Agent Skill, multi-file: 3 files)
- Install (CLI): `npx skillmds@latest add sapientinc/fin-effectiveness-model`
- Raw SKILL.md: https://api.skillmd.com/api/skills/sapientinc/fin-effectiveness-model/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: sapientinc (https://skillmd.com/u/sapientinc)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/sapientinc/fin-effectiveness-model

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# Fin effectiveness model

Provide only the deterministic grid-fin effectiveness/Jacobian used by the
allocator. Model dynamic pressure, Mach/angle proxies available in state,
angle, lever arm, saturation, and sign through analytic formulas, fixed tables,
or online finite differences without learning. Do not issue actuator commands
or alter the frozen plant.