---
name: fesa-mitc4-formulation
description: Work on or review MITC4 formulation details, benchmarks, or implementation notes using the documented baseline rather than memory.
---

# FESA MITC4 Formulation

Use this skill for MITC4 element math, implementation review, benchmark interpretation, or formulation documentation.

## Read First

- `/AGENTS.md`
- `/PROGRESS.md`
- `/PLAN.md`
- `/docs/MITC4_FORMULATION.md`
- `/docs/NUMERICAL_CONVENTIONS.md`
- `/docs/VERIFICATION_PLAN.md`
- `/docs/RESULTS_SCHEMA.md`
- `/docs/ARCHITECTURE.md`

## Workflow

1. Identify whether the work concerns basis construction, kinematics, transverse shear tying, drilling stiffness, integration, stress/resultant recovery, or benchmarks.
2. Check whether the relevant formula or convention is explicitly defined in `/docs/MITC4_FORMULATION.md`.
3. If it is not defined, treat it as a blocker or documentation task.
4. Keep Phase 1 focused on baseline formulation and reference benchmark passing.

## Do Not

- Do not infer missing tying-point equations from memory.
- Do not introduce S4R or reduced-integration behavior into Phase 1.
- Do not optimize before the baseline passes documented reference benchmarks.