"""
NXOpen script — Per-iteration Model B rebuild + solve + extract.

LOOP: Called by Atomizer for each trial.
1. Delete old Model B geometry + mesh
2. Import new 2D ribbed profile from rib_profile.json
3. Mesh with hard-point seeds at interface node locations
4. Merge nodes in Assembly FEM
5. Solve (Nastran)
6. Extract results → results.json

NOTE: Skeleton — requires NX environment for development.
See docs/technical-spec.md Section 4.3 for full pseudocode.
"""


def iteration_solve(profile_path, interface_nodes_path, afem_part):
    """
    Single optimization iteration.
    
    Returns dict with status, mass, stress/displacement fields.
    """
    raise NotImplementedError(
        "Develop inside NX Simcenter. See docs/technical-spec.md Section 4.3."
    )


def extract_results(afem, solution):
    """
    Extract field results from solved assembly FEM.
    Only from Model B elements (plate mesh), ignoring spiders.
    """
    raise NotImplementedError(
        "Develop inside NX Simcenter. See docs/technical-spec.md Section 4.3."
    )