FESADev/docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md

Linear Static 3D Euler Beam Implementation Report

Metadata

• feature_id: linear-static-3d-euler-beam
• source_plan: docs/implementation-plans/linear-static-3d-euler-beam.md
• source_design: docs/superpowers/specs/2026-08-08-linear-static-3d-euler-beam-design.md
• status: in-progress
• owner_agent: implementation-agent
• validation_environment: Windows, MSVC 19.51.36252, Visual Studio 18 2026, x64 Debug
• report_started: 2026-08-09

Step 7 — cmake-test-foundation

• task_id: TASK-07
• status: completed
• changed_files: CMakeLists.txt, cmake/FesaDependencies.cmake, include/fesa/build_info.hpp, src/fesa/build_info.cpp, src/fesa/CMakeLists.txt, tests/CMakeLists.txt, tests/unit/build_info_test.cpp, docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md
• requirement_ids: FESA-REQ-LS3DEB-030, FESA-REQ-LS3DEB-034
• test_ids: T07-BUILD-001, T07-BUILD-002

stage	exact command	exit_code	expected_or_observed_result	evidence_tail
RED	Temporarily move include/fesa/build_info.hpp to .harness/build_info.hpp.red-backup; run cmake --build .harness/build --config Debug --target fesa_unit_tests; restore the header in finally	1	Build fails because the public API is unavailable	build_info.cpp(1,10): error C1083: 'fesa/build_info.hpp': No such file or directory
GREEN	cmake --build .harness/build --config Debug --target fesa_tests; ctest --test-dir .harness/build -C Debug -R BuildInfo --output-on-failure	0	Foundation target builds and both named BuildInfo tests pass	BuildInfo.VersionIsStableAndNonEmpty and BuildInfo.PublicHeaderHasNoBackendDependency: 2/2 passed
VERIFY-configure	cmake -S . -B .harness/build -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"	0	MSVC x64 Debug build tree generated and dependencies resolved	Visual Studio 18 2026; MSVC 19.51.36252; MKL 2026.1; TBB and HDF5 CONFIG packages resolved
VERIFY-build	cmake --build .harness/build --config Debug	0	FESA and GoogleTest targets build without FESA warnings	fesa_solver.lib and fesa_unit_tests.exe built; no warning emitted under FESA /W4 /WX
VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	CTest discovers at least one test	2 tests discovered, both carrying linear-static-3d-euler-beam and unit labels
VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full suite has zero failures	2/2 tests passed

• contract_checks: GoogleTest revision 04ee1b4f2aefdffb0135d7cf2a2c519fe50dabe4; no default C:/git/googletest path in production CMake; /W4 /WX is private to fesa_solver; public BuildInfo header exposes only std::string_view.
• generated_evidence: .harness/build/src/fesa/Debug/fesa_solver.lib, .harness/build/tests/Debug/fesa_unit_tests.exe
• environment_note: Native Codex Windows workspace sandboxes stalled in the CMake compiler-id cl.exe child process. The identical approved configure, build, and CTest commands were therefore executed by the root session's authorized unrestricted shell; the same configure completed in 7.9 seconds.
• reference_diff: unchanged
• handoff: fesa_solver, fesa_unit_tests, fesa_tests, normalized Fesa::MKL, Fesa::TBB, Fesa::HDF5, and solverVersion() are available to Step 8.

Step 8 — core-diagnostics

• task_id: TASK-08
• status: completed
• changed_files: include/fesa/core/source_identity.hpp, include/fesa/core/diagnostic.hpp, include/fesa/core/status.hpp, src/fesa/core/diagnostic.cpp, src/fesa/core/status.cpp, src/fesa/CMakeLists.txt, tests/CMakeLists.txt, tests/unit/core/source_identity_test.cpp, tests/unit/core/diagnostic_test.cpp, tests/unit/core/status_test.cpp, docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md
• requirement_ids: FESA-REQ-LS3DEB-033, FESA-REQ-LS3DEB-034
• test_ids: T08-CORE-001, T08-CORE-002, T08-CORE-003

stage	exact command	exit_code	expected_or_observed_result	evidence_tail
RED	cmake --build .harness/build --config Debug --target fesa_tests	1	Tests are registered before production and fail for the three missing core headers	MSVC C1083 for fesa/core/diagnostic.hpp, fesa/core/source_identity.hpp, and fesa/core/status.hpp
GREEN-build	cmake --build .harness/build --config Debug --target fesa_tests	0	Minimal core implementation and all test translation units build	diagnostic.cpp, status.cpp, and three core tests compile; fesa_unit_tests.exe links
GREEN-test	ctest --test-dir .harness/build -C Debug -R CoreDiagnostics --output-on-failure	0	Identity, deterministic ordering, and Result exclusivity pass	3/3 CoreDiagnostics tests passed
VERIFY-configure	cmake -S . -B .harness/build -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"	0	Approved MSVC x64 build tree regenerates with normalized dependencies	Configure and generate completed; MKL 2026.1 resolved
VERIFY-build	cmake --build .harness/build --config Debug	0	Full Debug build passes without a new FESA warning	fesa_solver.lib and fesa_unit_tests.exe built under /W4 /WX
VERIFY-targeted	ctest --test-dir .harness/build -C Debug -R CoreDiagnostics --output-on-failure	0	Focused Step 8 suite remains green	3/3 tests passed
VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	CTest discovers the existing and new named tests	5 tests discovered with feature and unit labels
VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full accumulated C++ suite has zero failures	5/5 tests passed
VERIFY-harness	uv run --with pytest python -m pytest -v -rs	0	Harness regression suite remains green	4/4 tests passed

• contract_checks: SourceEntityId preserves numeric and raw label forms; sortDiagnostics() applies the fixed file/line/keyword/entity/code tuple with stable discovery-order ties; Status owns sorted diagnostics and optional failure category; Result<T> owns either a value or failed status and rejects both failed value access and construction from an OK status. Core public headers include only FESA core or C++ standard-library headers; no MKL/TBB/HDF5 names are present.
• generated_evidence: .harness/build/src/fesa/Debug/fesa_solver.lib, .harness/build/tests/Debug/fesa_unit_tests.exe
• reference_diff: unchanged
• handoff: SourceLocation, SourceEntityId, Diagnostic, deterministic diagnostic sorting, FailureCategory, Status, and Result<T> are available to Step 9 and later parser/model/solver tasks.