FESADev/phases/linear-static-mitc4-shell/step6.md

Step 6: Shell DOF Scatter

담당 역할과 필수 스킬

• 담당 역할: implementation-agent
• 필수 스킬: harness, fesa-cpp-msvc-tdd

읽어야 할 파일

• /.agents/skills/harness/SKILL.md, /.codex/skills/fesa-cpp-msvc-tdd/SKILL.md
• /AGENTS.md, /docs/PRD.md, /docs/ARCHITECTURE.md, /docs/ADR.md
• /docs/HARNESS.md, /docs/HARNESS_WORKFLOW.md, /.codex/hooks.json
• /docs/linear-static-mitc4-shell/implementation-plan.md
• /docs/linear-static-mitc4-shell/requirements.md Requirements 005/025
• /docs/linear-static-mitc4-shell/research.md
• /docs/linear-static-mitc4-shell/formulation.md
• /docs/linear-static-mitc4-shell/numerical-review.md
• /docs/linear-static-mitc4-shell/io.md
• /docs/linear-static-mitc4-shell/reference-model.md
• phase indexes, step6.md, Step 0 shell model and Step 5 summary
• /include/fesa/fem/dof_manager.hpp, /src/fesa/fem/dof_manager.cpp
• /tests/unit/fem/dof_manager_test.cpp
• /tests/unit/constraints/essential_constraints_test.cpp

작업

1. MITC4-DOF-001..003 tests를 먼저 작성한다.
2. 기존 node DOF order [ux,uy,uz,urx,ury,urz]를 유지한다.
3. B33 12-entry scatter를 보존하면서 shell four-node/source-order 24-entry typed scatter와 sorted unique sparse pattern을 DofManager 단독 소유로 추가한다.
4. Free/constrained numbering과 no/mixed/all constraint, nonzero prescribed value round trip을 shell-sized system에서 검증한다.
5. All-constrained 0x0 Kff가 valid하도록 existing constraint behavior를 보존한다.

Acceptance Criteria

$requiredBuildPaths=@("C:/git/googletest","C:/Program Files (x86)/Intel/oneAPI/mkl/2026.1/lib/cmake/mkl","C:/Program Files (x86)/Intel/oneAPI/tbb/2023.1/lib/cmake/tbb","C:/Program Files/HDF_Group/HDF5/2.1.1/cmake")
foreach($p in $requiredBuildPaths){if(-not(Test-Path -LiteralPath $p)){throw "Missing $p"}}
cmake --fresh -S . -B .harness/build -G "Visual Studio 18 2026" -A x64 `
  "-DFESA_GTEST_SOURCE_DIR=C:/git/googletest" `
  "-DMKL_DIR=C:/Program Files (x86)/Intel/oneAPI/mkl/2026.1/lib/cmake/mkl" `
  "-DTBB_DIR=C:/Program Files (x86)/Intel/oneAPI/tbb/2023.1/lib/cmake/tbb" `
  "-DHDF5_DIR=C:/Program Files/HDF_Group/HDF5/2.1.1/cmake"
cmake --build .harness/build --config Debug --target fesa_unit_tests
ctest --test-dir .harness/build -C Debug -R "DofManager|EssentialConstraints" --output-on-failure

Current 12-entry-only behavior의 expected RED 뒤 minimal GREEN. 이후:

cmake --build .harness/build --config Debug --target fesa_unit_tests
ctest --test-dir .harness/build -C Debug -R "DofManager|EssentialConstraints|DomainModel" --output-on-failure
cmake --build .harness/build --config Debug
ctest --test-dir .harness/build -C Debug --show-only=json-v1
ctest --test-dir .harness/build -C Debug --output-on-failure

검증 및 상태 갱신

RED/VERIFY evidence를 기록하고 current Step의 Codex-owned fields만 갱신한다.

금지사항

• Node/Element에 equation id를 저장하지 마라.
• Load/constraint ownership이나 sparse reduction을 이동하지 마라.
• 기존 B33 scatter behavior를 제거하지 마라.
• 직접 commit/hook 실행 또는 reference/upstream 변경을 하지 마라.