refactor: extract mitc4 geometry strain helpers
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NINI
@@ -13,7 +13,7 @@ Every new agent session must read this file together with `PROGRESS.md` before p
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- If an item becomes obsolete, move it to `PROGRESS.md` with a short reason instead of silently deleting it.
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## Current Objective
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Execute the Phase 1 structure-alignment refactor in `phases/1-structure-alignment-refactor`, continuing with P1A-06 MITC4 geometry/strain extraction. P1A-00 completed the architecture drift audit, P1A-01 created the module scaffold, P1A-02 extracted Core/Util plus Phase 1 Boundary/Load/Property model ownership, P1A-03 extracted Math primitives plus the solver adapter boundary, P1A-04 extracted the Abaqus Phase 1 parser into IO, and P1A-05 extracted Results/reference comparison without changing solver behavior. This phase must align the current monolithic `include/fesa/fesa.hpp` implementation with the module ownership model in `docs/ARCHITECTURE.md` without changing solver behavior. Product-level Phase 1 reference gaps R-010 and R-013 remain open and must not be hidden by the refactor.
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Execute the Phase 1 structure-alignment refactor in `phases/1-structure-alignment-refactor`, continuing with P1A-07 MITC4 material/stiffness extraction. P1A-00 completed the architecture drift audit, P1A-01 created the module scaffold, P1A-02 extracted Core/Util plus Phase 1 Boundary/Load/Property model ownership, P1A-03 extracted Math primitives plus the solver adapter boundary, P1A-04 extracted the Abaqus Phase 1 parser into IO, P1A-05 extracted Results/reference comparison, and P1A-06 extracted MITC4 geometry/strain helpers into Element without changing solver behavior. This phase must align the current monolithic `include/fesa/fesa.hpp` implementation with the module ownership model in `docs/ARCHITECTURE.md` without changing solver behavior. Product-level Phase 1 reference gaps R-010 and R-013 remain open and must not be hidden by the refactor.
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## Required Reading For New Agents
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1. `AGENTS.md`
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@@ -37,7 +37,7 @@ Execute the Phase 1 structure-alignment refactor in `phases/1-structure-alignmen
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## Phase Files
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- Active phase directory: `phases/1-structure-alignment-refactor`
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- Execute with: `python scripts/execute.py 1-structure-alignment-refactor`
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- Step numbering is zero-based. `step0.md` is complete and wrote `phases/1-structure-alignment-refactor/step0-architecture-map.md`; `step1.md` is complete and created module scaffold headers, source directories, CMake source discovery, and umbrella compatibility smoke coverage; `step2.md` is complete and extracted Core/Util domain, diagnostics, DofManager ownership, AnalysisModel/AnalysisState, and Phase 1 Boundary/Load/Property model ownership; `step3.md` is complete and extracted Math primitives, sparse pattern data, dense matrix support, and solver adapter boundary; `step4.md` is complete and extracted the Abaqus parser into IO; `step5.md` is complete and extracted Results/reference comparison code; `step6.md` extracts MITC4 geometry/strain helpers; `step7.md` extracts MITC4 material/stiffness helpers; `step8.md` extracts Assembly and Analysis workflow; `step9.md` is the independent architecture evaluator closeout.
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- Step numbering is zero-based. `step0.md` is complete and wrote `phases/1-structure-alignment-refactor/step0-architecture-map.md`; `step1.md` is complete and created module scaffold headers, source directories, CMake source discovery, and umbrella compatibility smoke coverage; `step2.md` is complete and extracted Core/Util domain, diagnostics, DofManager ownership, AnalysisModel/AnalysisState, and Phase 1 Boundary/Load/Property model ownership; `step3.md` is complete and extracted Math primitives, sparse pattern data, dense matrix support, and solver adapter boundary; `step4.md` is complete and extracted the Abaqus parser into IO; `step5.md` is complete and extracted Results/reference comparison code; `step6.md` is complete and extracted MITC4 geometry/strain helpers; `step7.md` extracts MITC4 material/stiffness helpers; `step8.md` extracts Assembly and Analysis workflow; `step9.md` is the independent architecture evaluator closeout.
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- Completed phase directory: `phases/1-linear-static-mitc4-rebaseline`
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- Historical execution command: `python scripts/execute.py 1-linear-static-mitc4-rebaseline`
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- Step numbering is zero-based. `step0.md` is complete and recorded in `phases/1-linear-static-mitc4-rebaseline/step0-audit.md`; `step1.md` is complete and created the `quad_02_phase1.inp` normalized reference path; `step2.md` is complete and revalidated core harness guardrails; `step3.md` is complete and revalidated the Phase 1 parser/domain subset; `step4.md` is complete and strengthened validation/singular diagnostics; `step5.md` is complete and revalidated the DofManager/reaction foundation; `step6.md` is complete and revalidated the minimum result model plus displacement CSV comparator; `step7.md` is complete and revalidated MITC4 natural coordinates, tying points, center directors, and integration bases; `step8.md` is complete and revalidated degenerated-continuum displacement, direct covariant strain rows, and MITC shear tying rows; `step9.md` is complete and revalidated plane-stress material, convected-to-local transform, and `2 x 2 x 2` material integration scaffolding; `step10.md` is complete and revalidated MITC4 stiffness, internal force, six-DOF transform, and drilling stabilization; `step11.md` is complete and added MITC4 membrane, bending, shear, twist, drilling-sensitivity, and thin-cantilever locking-sensitivity tests; `step12.md` is complete and revalidated full-space assembly, reduced projection, deterministic sparse-pattern scaffold, solver adapter injection, and full-vector internal/reaction force state; `step13.md` is complete and revalidated active AnalysisModel construction plus input-to-AnalysisState-to-U/RF result workflow; `step14.md` is complete and added the first stored Abaqus displacement regression for `quad_02_phase1`; `step15.md` is complete and recorded the independent evaluator closeout in `phases/1-linear-static-mitc4-rebaseline/step15-evaluator-report.md`.
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@@ -63,7 +63,7 @@ This phase is an architecture-preserving refactor. It must not change Phase 1 so
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| P1A-03 | completed | generator | Extract Math and solver adapter boundaries. | P1A-02 | Linear solver interface remains adapter-ready; int64 paths unchanged |
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| P1A-04 | completed | generator | Extract Abaqus parser into IO. | P1A-02 | Parser subset and unsupported-feature diagnostics unchanged |
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| P1A-05 | completed | generator | Extract Results model, writer boundary, CSV loader, and reference comparator. | P1A-02, P1A-04 | `U`/`RF` schema and `quad_02_phase1` regression unchanged |
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| P1A-06 | pending | generator | Extract MITC4 geometry, director, strain, and tying helpers into Element. | P1A-03 | Geometry/strain tests and formulation signs unchanged |
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| P1A-06 | completed | generator | Extract MITC4 geometry, director, strain, and tying helpers into Element. | P1A-03 | Geometry/strain tests and formulation signs unchanged |
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| P1A-07 | pending | generator | Extract MITC4 material, integration, stiffness, drilling, and internal-force helpers. | P1A-06 | Patch, drilling, stiffness, and locking-sensitivity tests unchanged |
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| P1A-08 | pending | generator | Extract Assembly and Analysis workflow. | P1A-02, P1A-03, P1A-05, P1A-07 | Full-vector RF, solver injection, and end-to-end reference regression unchanged |
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| P1A-09 | pending | evaluator | Independently evaluate final architecture alignment. | P1A-08 | `src/` ownership matches `ARCHITECTURE.md`; umbrella header is facade only |
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