FESADev/docs/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.

Step 9 — dense-math-adapters

• task_id: TASK-09
• status: completed
• changed_files: include/fesa/math/vector.hpp, include/fesa/math/matrix.hpp, src/fesa/math/vector.cpp, src/fesa/math/matrix.cpp, tests/unit/math/vector_test.cpp, tests/unit/math/matrix_test.cpp, src/fesa/CMakeLists.txt, tests/CMakeLists.txt, docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md, phases/linear-static-3d-euler-beam/index.json
• requirement_ids: FESA-REQ-LS3DEB-025, FESA-REQ-LS3DEB-034
• test_ids: T09-DENSE-001, T09-DENSE-002

stage	exact command	exit_code	expected_or_observed_result	evidence_tail
RED	cmake --build .harness/build --config Debug --target fesa_tests; ctest --test-dir .harness/build -C Debug -R DenseMath --output-on-failure	1	Both planned tests are registered before production and the build fails for the missing dense-math API	MSVC C1083 for fesa/math/matrix.hpp and fesa/math/vector.hpp; DenseMath discovery is unavailable until the test executable builds
GREEN-build	cmake --build .harness/build --config Debug --target fesa_tests	0	Minimal dense adapters, tests, and runtime staging compile, link, and complete GoogleTest discovery	matrix.cpp, vector.cpp, both math tests, fesa_solver.lib, and fesa_unit_tests.exe built; no FESA warning under /W4 /WX
GREEN-test	ctest --test-dir .harness/build -C Debug -R DenseMath --output-on-failure	0	Storage/ownership/checking and row-major BLAS contracts pass	2/2 DenseMath 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 explicit dependencies	Configure/generate completed; oneMKL 2026.1 dynamic ILP64 backend 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 DenseMath --output-on-failure	0	Focused dense-math suite remains green	2/2 tests passed
VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	CTest discovers the accumulated tests and both exact DenseMath names	7 tests discovered with feature/unit labels
VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full accumulated C++ suite has zero failures	7/7 tests passed
VERIFY-public-header	$leaks = rg -n "mkl\.h|MKL_INT|CBLAS_" include/fesa; if ($LASTEXITCODE -eq 0) { throw "MKL API leaked into public headers:n$leaks" }; if ($LASTEXITCODE -ne 1) { throw 'Public-header dependency scan failed' }`	0	Public headers remain independent of oneMKL API and types	rg returned the required no-match exit 1; wrapper scan completed with zero leaks

• contract_checks: Vector accepts zero size, owns contiguous doubles, deep-copies, leaves moved-from objects empty and usable, checks every index, and rejects dot/axpy mismatches; Matrix accepts zero dimensions, owns row-major contiguous doubles, deep-copies, leaves moved-from objects empty and usable, checks every index, and rejects GEMV/GEMM mismatches. Hand-derived nonsquare GEMV [50,122] and GEMM [[58,64],[139,154]] pass. All copy, dot, norm, scale, axpy, GEMV, and GEMM calls cross CBLAS only inside .cpp files. Windows tests stage the package-resolved oneMKL/OpenMP runtime before post-build discovery because the exact shell does not assume oneAPI in PATH.
• generated_evidence: .harness/build/src/fesa/Debug/fesa_solver.lib, .harness/build/tests/Debug/fesa_unit_tests.exe
• reference_diff: unchanged; git diff --exit-code -- reference/ exit 0
• handoff: backend-free fesa::Vector and fesa::Matrix public APIs, with owning dense storage and checked BLAS operations, are available to Step 10 and later DOF/element/assembly tasks.

Review Fix Round 1 — matrix-storage-size-overflow

• regression_test: tests/unit/math/matrix_test.cpp now constructs Matrix{SIZE_MAX / 2 + 1, 2} and requires std::length_error.
• RED: cmake --build .harness/build --config Debug --target fesa_tests exited 0; ctest --test-dir .harness/build -C Debug -R DenseMath --output-on-failure exited 8 with 1/2 failures because the wraparound constructor threw nothing.
• fix: Matrix computes its storage size through a checked helper before vector construction and rejects exactly columns != 0 && rows > SIZE_MAX / columns.
• GREEN: the same targeted build and DenseMath CTest commands exited 0; 2/2 passed.
• VERIFY: approved MSVC x64 configure and full Debug build exited 0; targeted DenseMath passed 2/2, discovery found 7 tests, and the full suite passed 7/7. The public-header MKL scan had zero matches, git diff --check exited 0, and git diff --exit-code -- reference/ exited 0.
• scope: the deferred empty-dot review minor was not changed, reference artifacts remain untouched, and phase Step 9 status/timestamps were not modified.

Step 10 — domain-model

• task_id: TASK-10
• status: completed
• changed_files: include/fesa/model/model_types.hpp, include/fesa/model/domain.hpp, src/fesa/model/domain.cpp, tests/unit/model/model_types_test.cpp, tests/unit/model/domain_test.cpp, src/fesa/CMakeLists.txt, tests/CMakeLists.txt, docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md, phases/linear-static-3d-euler-beam/index.json, .superpowers/sdd/linear-static-3d-euler-beam/task-10-report.md
• requirement_ids: FESA-REQ-LS3DEB-015, FESA-REQ-LS3DEB-016, FESA-REQ-LS3DEB-021, FESA-REQ-LS3DEB-030, FESA-REQ-LS3DEB-034
• test_ids: T10-DOM-001, T10-DOM-002, T10-DOM-003

stage	exact command	exit_code	expected_or_observed_result	evidence_tail
RED	cmake --build .harness/build --config Debug --target fesa_tests	1	Both planned test translation units are registered before production and fail for the missing model API	MSVC C1083 for fesa/model/domain.hpp and fesa/model/model_types.hpp; the subsequent ctest --test-dir .harness/build -C Debug -R DomainModel --output-on-failure exited 0 with No tests were found because the new test executable could not build
GREEN-build	cmake --build .harness/build --config Debug --target fesa_tests	0	Minimal model records, immutable Domain ownership, and both tests compile and link	domain.cpp, domain_test.cpp, and model_types_test.cpp built; fesa_solver.lib and fesa_unit_tests.exe linked without a FESA warning under /W4 /WX
GREEN-test	ctest --test-dir .harness/build -C Debug -R DomainModel --output-on-failure	0	Source/internal identity, stable immutable ownership, and multiple-instance distinction pass	3/3 exact DomainModel 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 explicit dependencies	Configure and generate completed; oneMKL 2026.1 and the existing dependency targets 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 DomainModel --output-on-failure	0	Focused Step 10 suite remains green	3/3 DomainModel tests passed
VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	CTest discovers the accumulated suite and all exact DomainModel names	10 tests discovered with linear-static-3d-euler-beam and unit labels
VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full accumulated C++ suite has zero failures	10/10 tests passed
VERIFY-dependency-direction	Backend scan over include/fesa; upward-include scan from include/fesa/model; core-to-model include scan from include/fesa/core using rg -n and fail-on-match wrappers	0	Public headers expose no MKL/PARDISO/TBB/HDF5 API and preserve core -> model dependency direction	backend leaks 0; model upward dependencies 0; core-to-model dependencies 0
VERIFY-diff	git diff --check	0	Patch has no whitespace errors	Exit 0; only Git LF-to-CRLF working-copy notices were emitted
VERIFY-reference	git diff --exit-code -- reference/	0	Approved reference artifacts remain unchanged	Exit 0 and git status --short -- reference/ produced no entries

• contract_checks: every ledger record preserves SourceLocation; the static step retains all four timing values; PartDefinition, InstanceDefinition, and SourceIndexMapping retain source-to-internal identity; ModelDefinition retains source path/content identity, heading, warnings, and all semantic vectors. Domain owns the complete definition and returns const references; declaration-order vector positions remain stable internal indices. Node and beam definitions contain no equation-numbering state, and same-part identity instances retain distinct source identities and connectivity.
• generated_evidence: .harness/build/src/fesa/Debug/fesa_solver.lib, .harness/build/tests/Debug/fesa_unit_tests.exe
• reference_diff: unchanged; git diff --exit-code -- reference/ exit 0
• handoff: backend-free EntityIndex, semantic model records, ModelDefinition, and immutable Domain::create/const accessors are available to Step 11 syntax parsing and Step 12 semantic mapping.

Step 11 — inp-syntax-parser

• task_id: TASK-11
• status: completed
• changed_files: include/fesa/io/abaqus/input_syntax.hpp, include/fesa/io/abaqus/input_reader.hpp, src/fesa/io/abaqus/input_reader.cpp, tests/unit/io/abaqus/input_syntax_test.cpp, tests/unit/io/abaqus/input_reader_test.cpp, src/fesa/CMakeLists.txt, tests/CMakeLists.txt, docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md, phases/linear-static-3d-euler-beam/index.json, .superpowers/sdd/linear-static-3d-euler-beam/task-11-report.md
• requirement_ids: FESA-REQ-LS3DEB-010, FESA-REQ-LS3DEB-034, FESA-REQ-LS3DEB-040
• test_ids: T11-SYN-001, T11-SYN-002, T11-SYN-003, T11-SYN-004

stage	exact command	exit_code	expected_or_observed_result	evidence_tail
RED	cmake --build .harness/build --config Debug --target fesa_tests; ctest --test-dir .harness/build -C Debug -R InpSyntax --output-on-failure	1	Both planned test files are registered before production and fail for the missing reader API	MSVC C1083 for fesa/io/abaqus/input_reader.hpp in both new test translation units; CTest subsequently reported No tests were found because the executable could not build
GREEN-build	cmake --build .harness/build --config Debug --target fesa_tests	0	Minimal syntax records, binary reader, and four tests compile and link	input_reader.cpp, both parser test files, fesa_solver.lib, and fesa_unit_tests.exe built without a FESA warning under /W4 /WX
GREEN-test	ctest --test-dir .harness/build -C Debug -R InpSyntax --output-on-failure	0	All exact syntax parsing behaviors pass	4/4 InpSyntax 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 explicit dependencies	Visual Studio 18 2026/MSVC environment selected; configure and generate completed; oneMKL 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 InpSyntax --output-on-failure	0	Focused Step 11 suite remains green	4/4 exact InpSyntax tests passed
VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	CTest discovers the accumulated suite and all four exact syntax tests	14 tests discovered with all four InpSyntax names and feature/unit labels
VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full accumulated C++ suite has zero failures	14/14 tests passed
VERIFY-dependency-direction	Backend, upward I/O, core-to-I/O, and semantic-policy scans over the Step 11 public/production files using rg -n fail-on-match wrappers	0	Public headers retain backend-free core -> io/abaqus direction and syntax parsing contains no Step 12 policy	backend leaks 0; upward I/O dependencies 0; core-to-I/O dependencies 0; semantic-policy matches 0; exactly four InpSyntax tests found
VERIFY-diff	git diff --check	0	Patch has no whitespace errors	Exit 0; only informational Git LF-to-CRLF working-copy notices were emitted
VERIFY-reference	git diff --exit-code -- reference/; git status --short -- reference/	0	Approved legacy reference artifacts remain unchanged	Diff exit 0 and reference status empty

• contract_checks: ParsedInput records the absolute lexically normalized source path and exact binary-byte FNV-1a identity formatted as fnv1a64: plus 16 lowercase hexadecimal digits. Keyword and parameter names alone become ASCII uppercase; parameter values, data label lexemes, empty and trailing data fields, and each keyword originalLine preserve source spelling. Comments and blanks remain excluded while physical 1-based file line accounting is retained. Unreadable file, empty keyword, and orphan data return categorized input diagnostics. No keyword allowlist, wrapper/nesting, numeric conversion, B31/B33, or output-request decision exists in this Step. The read-only legacy input parses as 30 keyword blocks with exact identity fnv1a64:04543464cc970405, unchanged bytes, and unchanged modification time.
• generated_evidence: .harness/build/src/fesa/Debug/fesa_solver.lib, .harness/build/tests/Debug/fesa_unit_tests.exe
• reference_diff: unchanged; git diff --exit-code -- reference/ exit 0
• handoff: backend-free KeywordParameter, DataLine, KeywordBlock, ParsedInput, and AbaqusInputReader::read with syntax/source provenance are available to Step 12 semantic mapping.

Step 12 — inp-domain-mapping

• task_id: TASK-12
• status: completed
• changed_files: include/fesa/io/abaqus/domain_mapper.hpp, src/fesa/io/abaqus/domain_mapper.cpp, tests/unit/io/abaqus/domain_mapper_test.cpp, src/fesa/CMakeLists.txt, tests/CMakeLists.txt, docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md, phases/linear-static-3d-euler-beam/index.json, .superpowers/sdd/linear-static-3d-euler-beam/task-12-report.md
• requirement_ids: FESA-REQ-LS3DEB-001, FESA-REQ-LS3DEB-002, FESA-REQ-LS3DEB-005 through FESA-REQ-LS3DEB-020, FESA-REQ-LS3DEB-034, FESA-REQ-LS3DEB-044
• test_ids: T12-MAP-001, T12-MAP-002, T12-MAP-003, T12-MAP-004, T12-MAP-005

stage	exact command	exit_code	expected_or_observed_result	evidence_tail
RED	cmake --build .harness/build --config Debug --target fesa_tests; ctest --test-dir .harness/build -C Debug -R InpDomainMapping --output-on-failure	1	All five planned tests were registered before production and the implementation-owned mapper API was absent	MSVC C1083 reported missing fesa/io/abaqus/domain_mapper.hpp; CTest then found no runnable mapper tests because the executable did not build
GREEN-build	cmake --build .harness/build --config Debug --target fesa_tests	0	The mapper, five semantic tests, solver library, and unit executable compile and link	domain_mapper.cpp and domain_mapper_test.cpp built without a FESA warning under /W4 /WX
GREEN-test	ctest --test-dir .harness/build -C Debug -R InpDomainMapping --output-on-failure	0	Exact supported inventory, deterministic expansion, no-op policy, negative portfolio, and DLOAD exclusion pass	5/5 exact InpDomainMapping 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 explicit dependencies	Windows SDK and oneMKL 2026.1 resolved; configure and generate completed
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 the existing /W4 /WX policy
VERIFY-targeted	ctest --test-dir .harness/build -C Debug -R InpDomainMapping --output-on-failure	0	Focused Step 12 suite remains green after review corrections	5/5 InpDomainMapping tests passed
VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	CTest discovers the accumulated suite and all five exact mapper tests	19 tests discovered with all five planned InpDomainMapping names and feature/unit labels
VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full accumulated C++ suite has zero failures	19/19 tests passed
VERIFY-dependency-direction	Backend, upward-I/O, core-upward, distributed-load-object, unapproved-nu-gate, and exact-test-count scans over Step 12 files	0	Public dependencies and approved scope remain intact	backend leaks 0; upward dependencies 0; core upward dependencies 0; distributed-load objects 0; unapproved nu gates 0; mapper tests 5
VERIFY-diff	git diff --check plus trailing-whitespace scan over the three new files	0	Tracked and untracked Step 12 files have no whitespace errors	Git reported informational LF-to-CRLF notices only; new-file trailing whitespace matches 0
VERIFY-reference	git diff --exit-code -- reference/; git status --short -- reference/	0	Approved legacy reference artifacts remain read-only and unchanged	Reference diff exit 0 and reference status empty

• contract_checks: the mapper consumes syntax-only ParsedInput and returns one complete immutable Domain or a categorized diagnostic. It enforces the monotonic top-level/part/assembly/step grammar, B33 only, identity instances only, exact inclusive set generation, case-insensitive references, stable declaration/instance-order internal IDs, and SourceEntityId {instance_name, source_label}. Direct node labels, part and assembly sets, ambiguous multi-instance labels/sets, and direct-versus-set constraint overlap are resolved before Domain success.
• contract_checks: material and section mapping uses exact E,nu, G=E/(2*(1+nu)), A,I11,I12,I22,J, exact I12=0, Iy=I11, Iz=I22, and n1 -> local y. It requires positive E,G,A,I11,I22,J without adding a nu < 0.5 gate. Nonfinite material, section, and guide data are model failures. Overflow-safe scaled norms apply the exact length and guide-vector inequalities; equality fails, values above pass, and valid finite geometry near 1e308 is accepted without a fallback axis.
• contract_checks: model-level and step-level boundaries and sole-step CLOAD targets are validated, conflicting expanded node/DOF prescriptions fail, the exact four positive finite *STATIC fields are retained, and the sole canonical result identity is Step-1, frame 0. The exact warning no-op allowlist produces stable ignored-input-keyword diagnostics without changing semantic objects. B31, transforms, nested/dependent assembly semantics, second step, NLGEOM, unknown keywords, and *DLOAD fail; no distributed-load Domain object, B31 alias, multi-step path, or transform fallback exists.
• generated_evidence: .harness/build/src/fesa/Debug/fesa_solver.lib, .harness/build/tests/Debug/fesa_unit_tests.exe
• reference_diff: unchanged; the legacy cantilever input maps successfully while exact bytes and modification time remain unchanged, and git diff --exit-code -- reference/ exits 0
• handoff: AbaqusDomainMapper::map(const ParsedInput&), complete immutable Domain objects, stable expanded node/element/set identities, validated material/section indices, and the sole StaticStepDefinition are available to Step 13 AnalysisModel.

Step 12 Review Corrections

• A duplicate-*ELASTIC regression test first failed because a second consecutive elasticity record lost the owning-material state. Preserving the immediate material eligibility produced the exact duplicate-entity diagnostic and restored targeted 5/5.
• Ten monotonic-order regressions first failed at the accepted late-*PART case. Explicit phase state now rejects late model data, assembly sets before or followed by instances, element-before-node, incomplete block closure, and pre-*STATIC or out-of-order history data with invalid-keyword-location.
• Review edge tests then failed for valid 1e308 geometry and for nonfinite elasticity being classified as input. Context-specific model parsing, overflow-safe scaled geometry comparisons, active beam-section context, exact GENERATE landing, direct/ambiguous target resolution, and exact threshold cases were added. The corrected focused suite passes 5/5 and the full accumulated suite passes 19/19.
• Focused re-review returned Critical 0 and Important 0. Its sole remaining minor requested an explicit negative transverse-shear context assertion; that table case was added and passes without a production change.

Step 12 Root Review Fix Round 1 — same-token target ambiguity

• finding: resolveNodeTarget returned one matching node set before computing the direct numeric source-label candidates. A token such as 1 therefore silently selected NSET=1 even when node source label 1 was also a valid interpretation.
• regression_scope: RejectsUnsupportedAndInvalidPortfolio now constructs an NSET named 1 containing node 2 while node label 1 also exists, and exercises the same token independently through both *BOUNDARY and *CLOAD. It requires input-category unresolved-reference with exact keyword, entity identity 1, and original data-row file/line location.
• RED-build: cmake --build .harness/build --config Debug --target fesa_tests exited 0 after registering the two regression paths.
• RED-test: ctest --test-dir .harness/build -C Debug -R "InpDomainMapping.RejectsUnsupportedAndInvalidPortfolio" --output-on-failure exited 8. The test failed at same-token-boundary because result.hasValue() was true instead of the required structured failure.
• fix: target resolution computes both name-matched node sets and numeric direct-node candidates before returning either. Multiple candidates within an interpretation or one valid candidate from each interpretation use the existing input/unresolved-reference ambiguity contract; unique set-only and direct-only paths remain unchanged.
• GREEN: the targeted build exited 0 and ctest --test-dir .harness/build -C Debug -R InpDomainMapping --output-on-failure exited 0 with 5/5 passed.
• VERIFY: approved explicit-dependency MSVC x64 configure and full Debug build exited 0; discovery found 19 tests including all five mapper names; full CTest passed 19/19. Backend/upward/core-upward/distributed-load/unapproved nu scans were 0, exactly five mapper tests remained, git diff --check exited 0, and reference diff/status were clean.
• deferred_scope: the separate known-but-misplaced keyword diagnostic Minor was deliberately not changed in this fix round. No phase-index change and no commit were made.

Step 13 — analysis-model

• task_id: TASK-13
• status: completed
• changed_files: include/fesa/analysis/analysis_model.hpp, src/fesa/analysis/analysis_model.cpp, tests/unit/analysis/analysis_model_test.cpp, src/fesa/CMakeLists.txt, tests/CMakeLists.txt, docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md, phases/linear-static-3d-euler-beam/index.json, .superpowers/sdd/linear-static-3d-euler-beam/task-13-report.md
• requirement_ids: FESA-REQ-LS3DEB-001, FESA-REQ-LS3DEB-021, FESA-REQ-LS3DEB-034
• test_ids: T13-MODEL-001, T13-MODEL-002, T13-MODEL-003

stage	exact command	exit_code	expected_or_observed_result	evidence_tail
RED-build	cmake --build .harness/build --config Debug --target fesa_tests	1	Exactly three planned tests were registered before production and the AnalysisModel API was absent	MSVC C1083 reported missing fesa/analysis/analysis_model.hpp from analysis_model_test.cpp
RED-test	ctest --test-dir .harness/build -C Debug -R AnalysisModel --output-on-failure	0	No focused test was runnable because the test executable could not rebuild	CTest reported No tests were found after the implementation-owned compile RED
GREEN-build	cmake --build .harness/build --config Debug --target fesa_tests	0	Minimal non-owning active view and all three tests compile and link	analysis_model.cpp, analysis_model_test.cpp, fesa_solver.lib, and fesa_unit_tests.exe built without a FESA warning under /W4 /WX
GREEN-test	ctest --test-dir .harness/build -C Debug -R AnalysisModel --output-on-failure	0	Active classification, address identity/immutability, and cardinality diagnostics pass	3/3 exact AnalysisModel 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 explicit-dependency MSVC x64 build tree generates	Windows SDK and oneMKL 2026.1 resolved; configure and generate completed
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 AnalysisModel --output-on-failure	0	Focused Step 13 suite remains green	3/3 exact AnalysisModel tests passed
VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	CTest discovers the accumulated suite and all three exact AnalysisModel names	22 tests discovered with feature/unit labels
VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full accumulated C++ suite has zero failures	22/22 tests passed
VERIFY-dependency-direction	Backend public-header, upward-analysis dependency, DOF/numeric-state, exact-test-count, registration, and trailing-whitespace scans using fail-on-match rg wrappers	0	AnalysisModel stays backend-free and below later solver layers, with no DOF/state ownership	backend leaks 0; upward dependencies 0; DOF/numeric-state leaks 0; tests 3; CMake registrations 1/1; new-file trailing whitespace 0
VERIFY-diff	git diff --check	0	Tracked patch has no whitespace errors	Exit 0; only informational Git LF-to-CRLF working-copy notices were emitted
VERIFY-reference	git diff --exit-code -- reference/; git status --short -- reference/	0	Approved legacy reference artifacts remain read-only and unchanged	Reference diff exit 0 and reference status empty

• contract_checks: AnalysisModel stores one non-owning const Domain* plus stable EntityIndex vectors only. All Domain elements are active in stable internal order; reachable material and section IDs are deduplicated by an ascending internal-index scan; boundary/load IDs are the sole step's vector positions. domain() and step() preserve exact address identity, and the tests verify semantic storage addresses and values remain unchanged. Missing and multiple steps return categorized invalid-model-cardinality and unsupported-multiple-step diagnostics. No equation numbering, constraint propagation, multi-step activation, or numeric analysis state was added.
• generated_evidence: .harness/build/src/fesa/Debug/fesa_solver.lib, .harness/build/tests/Debug/fesa_unit_tests.exe
• reference_diff: unchanged; git diff --exit-code -- reference/ exit 0
• handoff: the exact AnalysisModel ledger API, sole-step reference, and stable active element/material/section/boundary/load IDs are available to Step 14 DofManager without copying or mutating Domain entities.

Step 14 — dof-manager

• task_id: TASK-14
• status: completed
• changed_files: include/fesa/fem/dof_manager.hpp, src/fesa/fem/dof_manager.cpp, tests/unit/fem/dof_manager_test.cpp, src/fesa/CMakeLists.txt, tests/CMakeLists.txt, docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md, phases/linear-static-3d-euler-beam/index.json, .superpowers/sdd/linear-static-3d-euler-beam/task-14-report.md
• requirement_ids: FESA-REQ-LS3DEB-003, FESA-REQ-LS3DEB-007, FESA-REQ-LS3DEB-011, FESA-REQ-LS3DEB-022, FESA-REQ-LS3DEB-034
• test_ids: T14-DOF-001, T14-DOF-002, T14-DOF-003, T14-DOF-004

stage	exact command	exit_code	expected_or_observed_result	evidence_tail
RED-build	cmake --build .harness/build --config Debug --target fesa_tests	1	Exactly four planned tests are registered before production and fail for the missing DofManager API	MSVC C1083 reported missing fesa/fem/dof_manager.hpp from dof_manager_test.cpp after successful CMake regeneration
RED-test	ctest --test-dir .harness/build -C Debug -R DofManager --output-on-failure	0	No focused test is runnable because the test executable cannot rebuild	CTest reported No tests were found after the implementation-owned compile RED
GREEN-build	cmake --build .harness/build --config Debug --target fesa_tests	0	Minimal DofManager, its four tests, solver library, and unit executable compile and link	dof_manager.cpp, dof_manager_test.cpp, fesa_solver.lib, and fesa_unit_tests.exe built without a FESA warning under /W4 /WX
GREEN-test	ctest --test-dir .harness/build -C Debug -R DofManager --output-on-failure	0	Numbering, constraints, scatter/pattern, and mapping-owned round-trip pass	4/4 exact DofManager 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 explicit-dependency MSVC x64 build tree generates	Windows SDK and oneMKL 2026.1 resolved; configure and generate completed
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 DofManager --output-on-failure	0	Focused Step 14 suite remains green	4/4 exact DofManager tests passed
VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	CTest discovers the accumulated suite and all four exact DofManager names	26 tests discovered, including 4 DofManager tests, with feature/unit labels
VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full accumulated C++ suite has zero failures	26/26 tests passed
VERIFY-contract-scans	Backend public-header, upward-FEM dependency, model/analysis equation-state, out-of-scope feature, unledgered API, exact-test-count, and CMake-registration scans using fail-on-match rg wrappers	0	DofManager remains the sole equation/scatter/pattern owner and implements only the exact public ledger	backend leaks 0; upward dependencies 0; model/analysis equation state 0; penalty/MPC/RBE/numeric sparse storage 0; unledgered APIs 0; tests 4; registrations 1/1
VERIFY-diff	git diff --check plus trailing-whitespace scan over the three new files	0	Tracked and untracked Step 14 files have no whitespace errors	Diff check exit 0; new-file trailing whitespace matches 0
VERIFY-reference	git diff --exit-code -- reference/; git status --short -- reference/	0	Approved legacy reference artifacts remain read-only and unchanged	Reference diff exit 0 and reference status empty

• contract_checks: full DOFs follow stable node index and exact component order [UX,UY,UZ,URX,URY,URZ]; free equations and constrained DOFs are ascending full-index mappings. Case-insensitive node-set and direct source-label targets expand deterministically; equal overlap is retained once, while different values return conflicting-boundary-condition at the conflicting row's source location. prescribedValues() has the same size/order as constrainedDofs() and preserves zero and nonzero values.
• contract_checks: each active B33 definition has one 12-entry scatter in endpoint/component order. The full-space CSR pattern has 19 row offsets and 252 sorted-unique structural columns for the two-element chain fixture. Stable free/constrained maps reconstruct the full vector without adding an API absent from the exact ledger. Node and element records remain unchanged and contain no equation IDs; no penalty, MPC, RBE, or sparse numeric storage was added.
• generated_evidence: .harness/build/src/fesa/Debug/fesa_solver.lib, .harness/build/tests/Debug/fesa_unit_tests.exe, .harness/build/step14-ctest-discovery.json
• reference_diff: unchanged; git diff --exit-code -- reference/ exit 0
• handoff: backend-free DofComponent, SparsePattern, and the exact DofManager ledger API provide deterministic full/free/constrained maps, prescribed dc, active-element scatter, and full structural CSR pattern to Step 15 and later assembly/constraint tasks.

Step 15 — analysis-state

• task_id: TASK-15
• status: completed
• changed_files: include/fesa/results/result_records.hpp, include/fesa/analysis/analysis_state.hpp, src/fesa/analysis/analysis_state.cpp, tests/unit/results/result_records_test.cpp, tests/unit/analysis/analysis_state_test.cpp, src/fesa/CMakeLists.txt, tests/CMakeLists.txt, docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md, phases/linear-static-3d-euler-beam/index.json, .superpowers/sdd/linear-static-3d-euler-beam/task-15-report.md
• requirement_ids: FESA-REQ-LS3DEB-003, FESA-REQ-LS3DEB-023, FESA-REQ-LS3DEB-031, FESA-REQ-LS3DEB-034
• test_ids: T15-STATE-001, T15-STATE-002, T15-STATE-003

stage	exact command	exit_code	expected_or_observed_result	evidence_tail
RED-build	cmake --build .harness/build --config Debug --target fesa_tests	1	Exactly three planned tests were registered before production and the result-record/state API was absent	MSVC C1083 reported missing fesa/analysis/analysis_state.hpp from both new test translation units after successful CMake regeneration
RED-test	ctest --test-dir .harness/build -C Debug -R AnalysisState --output-on-failure	0	No focused test was runnable because the unit test executable could not rebuild	CTest reported No tests were found after the implementation-owned compile RED
GREEN-build	cmake --build .harness/build --config Debug --target fesa_tests	0	Minimal records/state implementation and all three tests compile and link	analysis_state.cpp, both test files, fesa_solver.lib, and fesa_unit_tests.exe built without a FESA warning under /W4 /WX
GREEN-test	ctest --test-dir .harness/build -C Debug -R AnalysisState --output-on-failure	0	Allocation, identity/order, and copy/move ownership tests pass	3/3 exact AnalysisState 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 explicit-dependency MSVC x64 build tree generates	Windows SDK and oneMKL 2026.1 resolved; configure and generate completed
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 AnalysisState --output-on-failure	0	Focused Step 15 suite remains green	3/3 exact AnalysisState tests passed
VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	CTest discovers the accumulated suite and all three exact AnalysisState names	29 tests discovered with feature/unit labels
VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full accumulated C++ suite has zero failures	29/29 tests passed
VERIFY-contract-scans	Backend public-header, forbidden V0 state/API, Domain/AnalysisModel ownership, result-record upward dependency, exact-test-count, and CMake-registration scans using fail-on-match rg wrappers	0	State and row records implement only the exact backend-free V0 ledger	backend leaks 0; forbidden state/API 0; Domain/AnalysisModel ownership 0; result upward dependencies 0; tests 3; registrations 1/1/1
VERIFY-diff	git diff --check plus trailing-whitespace scan over the five new files	0	Tracked and untracked Step 15 files have no whitespace errors	Diff check exit 0; new-file trailing whitespace matches 0
VERIFY-reference	git diff --exit-code -- reference/; git status --short -- reference/	0	Approved legacy reference artifacts remain read-only and unchanged	Reference diff exit 0 and reference status empty

• contract_checks: displacement, external force, internal force, residual, and reaction are five independently owned Vector values sized to DofManager::fullDofCount() and zero-initialized. Reaction remains in full DOF index space even when only a subset is constrained, leaving free components available for residual sanity checks. Mutable and const accessors return the same owned vector storage.
• contract_checks: StepFrameIdentity, EndpointResultRow, GaussResultRow, and StressS11Row match the public ledger field order. Owned endpoint, Gauss, and stress vectors preserve append order and expose stable mutable and const collections. Default copy/move operations follow the ledger: copies deep-own vector/row storage, and moved-to state retains identity and values without aliasing another live state.
• contract_checks: no velocity, acceleration, temperature, iteration history, nonlinear element state, Domain copy/reference, equation numbering, HDF5, MKL, or oneTBB API/storage was added.
• generated_evidence: .harness/build/src/fesa/Debug/fesa_solver.lib, .harness/build/tests/Debug/fesa_unit_tests.exe
• reference_diff: unchanged; git diff --exit-code -- reference/ exit 0
• handoff: the exact backend-free result records and AnalysisState ledger API provide full-space mutable solution vectors, step/frame identity, and stable recovery-row collections to Step 16 and later result recovery/output tasks.

Step 16 — euler-beam-element

• task_id: TASK-16
• status: completed
• changed_files: include/fesa/elements/euler_beam_3d.hpp, src/fesa/elements/euler_beam_3d.cpp, tests/unit/elements/euler_beam_3d_test.cpp, src/fesa/CMakeLists.txt, tests/CMakeLists.txt, docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md, phases/linear-static-3d-euler-beam/index.json, .superpowers/sdd/linear-static-3d-euler-beam/task-16-report.md
• requirement_ids: FESA-REQ-LS3DEB-002, FESA-REQ-LS3DEB-004, FESA-REQ-LS3DEB-008, FESA-REQ-LS3DEB-012, FESA-REQ-LS3DEB-013, FESA-REQ-LS3DEB-014, FESA-REQ-LS3DEB-031, FESA-REQ-LS3DEB-032, FESA-REQ-LS3DEB-035, FESA-REQ-LS3DEB-044
• test_ids: T16-BEAM-001, T16-BEAM-002, T16-BEAM-003, T16-BEAM-004, T16-BEAM-005, T16-BEAM-006, T16-BEAM-007, T16-BEAM-008, T16-BEAM-009, T16-BEAM-010

stage	exact command	exit_code	expected_or_observed_result	evidence_tail
RED-build	cmake --build .harness/build --config Debug --target fesa_tests	1	Exactly ten planned tests were registered before production and the EulerBeam3D public API was absent	MSVC C1083 reported missing fesa/elements/euler_beam_3d.hpp from euler_beam_3d_test.cpp after successful CMake regeneration
GREEN-build	cmake --build .harness/build --config Debug --target fesa_tests	0	The minimum beam kernel, ten tests, solver library, and unit executable compile and link	euler_beam_3d.cpp, euler_beam_3d_test.cpp, fesa_solver.lib, and fesa_unit_tests.exe built without a FESA warning under /W4 /WX
GREEN-test	ctest --test-dir .harness/build -C Debug -R EulerBeam3D --output-on-failure	0	Reviewed signs, Gauss integration, rank, transform, loads, analytical modes, validation, recovery, patches, and negative control pass	10/10 exact EulerBeam3D 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 explicit-dependency MSVC x64 build tree generates	Windows SDK, oneMKL 2026.1, oneTBB, and HDF5 resolved; configure and generate completed
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 EulerBeam3D --output-on-failure	0	Focused Step 16 suite remains green	10/10 exact EulerBeam3D tests passed
VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	CTest discovers the accumulated suite and all ten exact EulerBeam3D names	39 tests discovered, including 10 EulerBeam3D tests, with feature/unit labels
VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full accumulated C++ suite has zero failures	39/39 tests passed
VERIFY-contract-scans	Backend public-header, upward-dependency, out-of-scope formulation, production one-point path, two-point Gauss/invariant, exact-test-count, and CMake-registration scans using fail-on-match rg wrappers	0	The kernel implements only the approved exact ledger and numerical integration contract	backend leaks 0; upward dependencies 0; out-of-scope couplings 0; production one-point paths 0; two-point Gauss consumers 3; normalized closed-form invariant 1e-12; tests 10; registrations 1/1
VERIFY-diff	git diff --check plus trailing-whitespace scan over the three new files	0	Tracked and untracked Step 16 files have no whitespace errors	Diff check exit 0; new-file trailing whitespace matches 0
VERIFY-reference	git diff --exit-code -- reference/; git status --short -- reference/	0	Approved legacy reference artifacts remain read-only and unchanged	Reference diff exit 0 and reference status empty

• green_triage: the first implementation build passed and the first focused run was 9/10. The single failure was isolated to a large-coordinate test fixture whose requested equality rounded to a represented length above the threshold. The test fixture was replaced by an exactly representable unit threshold equality plus below/above large-coordinate cases; the production strict > comparison and formulation were unchanged before the 10/10 run.
• contract_checks: local DOF order is exactly [u1,v1,w1,rx1,ry1,rz1,u2,v2,w2,rx2,ry2,rz2]. Rotation rows are (ex,ey,ez), dl=T*dg, and Kg=T^T*Kl*T. The B-matrix follows the reviewed theta_y=-w', theta_z=v' signs; two-point Gauss B^T D B is the sole production stiffness path and is checked against the independent closed matrix with normalized tolerance 1e-12. The test-only one-point rule has rank four while the production rule has rank six and six rigid modes.
• contract_checks: length and guide-vector tests use the exact scale-aware strict thresholds with no fallback axis. E, derived G, A, Iy, Iz, and J must be finite and positive and I12 must be exactly zero. Constant local px,py,pz,mx receives the consistent signed load only; no parser, *DLOAD, B31, Timoshenko, shear correction, or transverse/torsional stress support was added.
• contract_checks: recovery keeps local outward equilibrium end actions, endpoint section resultants, and two-Gauss generalized strain/resultants distinct. Axial stress is S11=E(epsilon0+x2*kappa_y-x1*kappa_z) in input section-point order; absent input points produce section point 0 at the centroid with source fesa-default.
• generated_evidence: .harness/build/src/fesa/Debug/fesa_solver.lib, .harness/build/tests/Debug/fesa_unit_tests.exe
• reference_diff: unchanged; git diff --exit-code -- reference/ exit 0
• handoff: the exact backend-free EulerBeam3D ledger API supplies global and local stiffness, constant local equivalent load, and distinct recovery data to Step 18 sparse assembly and Step 22 result recovery without owning element identity, equation numbering, parser coupling, or result persistence.

Root numerical review — Fix Round 1

• scope: all three Important findings addressed in src/fesa/elements/euler_beam_3d.cpp and the existing exact T16 tests; the two Minor findings were intentionally not changed in this round.
• defect_RED: after adding finite-positive derived-overflow, derived-underflow, and length-scaled-underflow fixtures to existing T16-BEAM-007, ctest --test-dir .harness/build -C Debug -R EulerBeam3D.RejectsInvalidGeometryAndProperties --output-on-failure exited 8. All three invalid fixtures were accepted; the diagnostic path observed respectively a nonfinite stiffness with maximum inf, an all-zero stiffness, and a stiffness with a required bending coefficient underflowed to zero.
• defect_GREEN: cmake --build .harness/build --config Debug --target fesa_tests exited 0 and the same focused CTest exited 0 with 1/1 passed. create() now requires derived EA, GJ, EIy, EIz and all ten distinct positive length-scaled axial/torsion/bending block magnitudes to be finite and strictly positive. This rejects arithmetic overflow/underflow as invalid-beam-property without a conditioning threshold.
• invariant_hardening: production normalizedMatrixError now returns infinite error for any nonfinite operand, difference, scale, or quotient, so the two-point/closed-form 1e-12 invariant fails closed.
• analytical_hardening: every nonzero reference in existing T16-BEAM-006 now checks abs(actual-reference)/abs(reference) <= 1e-9; only the explicitly zero free-end resultants retain an absolute check. This evidence-only change was expected to remain GREEN and its focused test passed without a production correction.
• convergence_hardening: existing T16-BEAM-005 directly assembles aligned 1/2/4-element [v,rz] cantilever systems from public localStiffness() and localEquivalentLoad() only. It checks each exact signed constant transverse element load, solves a test-only dense reduced system, and uses independent five-point integration of interior cubic-Hermite displacement error against the quartic uniform-load solution. Both refinements are monotone and each observed order is 4 within 1e-8. No DLOAD, parser, Domain, or production assembly support was introduced. This evidence-only change was expected to remain GREEN and the T16-005/T16-006 focused run passed 2/2.

stage	exact command	exit_code	observed_result
FIX1-RED	ctest --test-dir .harness/build -C Debug -R EulerBeam3D.RejectsInvalidGeometryAndProperties --output-on-failure	8	0/1 passed; unexpected acceptance exposed nonfinite and zero stiffness outcomes
FIX1-GREEN-build	cmake --build .harness/build --config Debug --target fesa_tests	0	corrected source and unchanged ten test names compiled under /W4 /WX without a warning
FIX1-GREEN-defect	ctest --test-dir .harness/build -C Debug -R EulerBeam3D.RejectsInvalidGeometryAndProperties --output-on-failure	0	1/1 passed
FIX1-GREEN-evidence	`ctest --test-dir .harness/build -C Debug -R 'EulerBeam3D.(ConstantLineLoadMatchesAllSignedComponents	AnalyticalAxialTorsionAndTwoPlaneBendingRecover)' --output-on-failure`	0
FIX1-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	exact MSVC x64 Debug tree configured and generated
FIX1-VERIFY-build	cmake --build .harness/build --config Debug	0	full Debug build completed without a new warning
FIX1-VERIFY-targeted	ctest --test-dir .harness/build -C Debug -R EulerBeam3D --output-on-failure	0	exact 10/10 passed
FIX1-VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	39 total tests discovered, including the same ten EulerBeam3D names
FIX1-VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	39/39 passed
FIX1-VERIFY-scans	fail-on-match numerical invariant, dependency, scope, exact-test-count, reference, phase-index, and diff/whitespace scans	0	derived rigidity/coefficient and fail-closed checks present; tests 10; leaks 0; reference and phase index unchanged; diff clean

Step 17 — parallel-for-tbb

• task_id: TASK-17
• status: completed
• changed_files: include/fesa/assembly/parallel_for.hpp, src/fesa/assembly/parallel_for.cpp, tests/unit/assembly/parallel_for_test.cpp, src/fesa/CMakeLists.txt, tests/CMakeLists.txt, docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md, phases/linear-static-3d-euler-beam/index.json, .superpowers/sdd/linear-static-3d-euler-beam/task-17-report.md
• requirement_ids: FESA-REQ-LS3DEB-024, FESA-REQ-LS3DEB-025, FESA-REQ-LS3DEB-034
• test_ids: T17-PFOR-001, T17-PFOR-002, T17-PFOR-003

stage	exact command	exit_code	expected_or_observed_result	evidence_tail
RED-build	cmake --build .harness/build --config Debug --target fesa_tests	1	Exactly three planned tests were registered before production and the ParallelFor public API was absent	MSVC C1083 reported missing fesa/assembly/parallel_for.hpp from parallel_for_test.cpp after successful CMake regeneration
GREEN-build	cmake --build .harness/build --config Debug --target fesa_tests	0	Minimal serial/oneTBB adapters, three tests, solver library, and unit executable compile and link	parallel_for.cpp, parallel_for_test.cpp, fesa_solver.lib, and fesa_unit_tests.exe built without a FESA warning under /W4 /WX; oneTBB runtime staged for discovery
GREEN-test	ctest --test-dir .harness/build -C Debug -R ParallelFor --output-on-failure	0	Zero/one/many exact-once, stable indexed output, and exception propagation pass	3/3 exact ParallelFor 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 explicit-dependency MSVC x64 build tree generates	Windows SDK, oneMKL 2026.1, oneTBB, and HDF5 resolved; configure and generate completed
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 ParallelFor --output-on-failure	0	Focused Step 17 suite remains green	3/3 exact ParallelFor tests passed
VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	CTest discovers the accumulated suite and all three exact ParallelFor names	42 tests discovered, including 3 ParallelFor tests, with feature/unit labels
VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full accumulated C++ suite has zero failures	42/42 tests passed
VERIFY-contract-scans	Public oneTBB leak, private include, forbidden scheduler/assembly scope, exact-test-count, and CMake-registration scans using fail-on-match/count rg wrappers	0	The backend-free adapter implements only independent indexed work and retains the default caller-scoped scheduler policy	public TBB leaks 0; forbidden global/sparse/reduction policy 0; private TBB includes 1; tests 3; registrations 1/1/1
VERIFY-diff	git diff --check plus trailing-whitespace scan over the three new files	0	Tracked and untracked Step 17 files have no whitespace errors	Diff check exit 0; new-file trailing whitespace matches 0
VERIFY-reference	git diff --exit-code -- reference/; git status --short -- reference/	0	Approved legacy reference artifacts remain read-only and unchanged	Reference diff exit 0 and reference status empty

• contract_checks: ParallelFor, SerialParallelFor, and TbbParallelFor expose only std::size_t and std::function in the public header. oneTBB headers/types remain private to parallel_for.cpp, and the normalized Fesa::TBB dependency is private to fesa_solver.
• contract_checks: both implementations execute [0,count) exactly once and make count==0 a no-op. Deterministic result ordering is caller-owned: bodies write only their index-addressed slot, and this adapter performs no global sparse write, COO/CSR reduction, mutex, or atomic accumulation.
• contract_checks: serial and oneTBB execution preserve the original body exception type and message. oneTBB cancellation may allow already-running indexed work to finish; callers receive the rethrown exception and must not infer a deterministic partial-completion count.
• contract_checks: the adapter uses oneTBB's default caller-scoped scheduler; it creates no process-wide thread setting, global_control, or task arena, and does not override later MKL/TBB oversubscription coordination.
• generated_evidence: .harness/build/src/fesa/Debug/fesa_solver.lib, .harness/build/tests/Debug/fesa_unit_tests.exe
• reference_diff: unchanged; git diff --exit-code -- reference/ exit 0
• handoff: Step 18 can inject either backend for independent element-local computation into caller-owned stable element-order slots before its separate deterministic COO-to-CSR reduction.

Step 17 Review Fix Round 1 — atomic test evidence

• classification: test-evidence reliability hardening; no production defect was observed or corrected.
• baseline_GREEN: before changing the test, ctest --test-dir .harness/build -C Debug -R ParallelFor --output-on-failure exited 0 with the existing production adapter passing 3/3. Because the review changes only how a test observes duplicate callbacks, no implementation-owned RED was expected or manufactured.
• reliability_issue: the prior std::vector scalar writes were race-free only if the exact-once contract was already true. A duplicate concurrent callback for one index could write the same non-atomic scalar concurrently, making the negative case undefined instead of a deterministic test failure.
• correction: T17-PFOR-001 now uses an explicitly initialized atomic zero-count counter and explicitly initialized per-index atomic visit counters. T17-PFOR-002 uses explicitly initialized atomic serial/TBB output slots plus per-index atomic visit counters. All callback increments use fetch_add(1, memory_order_relaxed) and post-execution assertions require every count to equal one, so duplicate same-index callbacks are observed without a data race. Output stores/loads are relaxed atomics because only per-slot observation is required after the blocking adapter returns.
• scope: only tests/unit/assembly/parallel_for_test.cpp, this cumulative Step 17 section, and the ignored task-17-report.md changed. Production, CMake, the phase index, upstream contracts, and reference artifacts were not modified in this review round; the exact three test names remain unchanged.

stage	exact command	exit_code	observed_result
REVIEW1-baseline-GREEN	ctest --test-dir .harness/build -C Debug -R ParallelFor --output-on-failure	0	existing correct production passed 3/3 before test hardening; no implementation RED expected
REVIEW1-VERIFY-build	cmake --build .harness/build --config Debug	0	C++17 atomic test evidence compiled and linked under MSVC /W4 /WX without a warning
REVIEW1-VERIFY-targeted	ctest --test-dir .harness/build -C Debug -R ParallelFor --output-on-failure	0	hardened exact three ParallelFor tests passed 3/3
REVIEW1-VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	42 tests discovered, including the unchanged three exact ParallelFor names
REVIEW1-VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	full accumulated suite passed 42/42
REVIEW1-VERIFY-scans	public TBB leak, production scope, atomic reliability, reference, and diff/whitespace scans	0	public leaks 0; forbidden production scope 0; atomic vectors 5; relaxed duplicate counters 4; legacy non-atomic visit/output paths 0; reference unchanged; diff clean

Step 18 — sparse-assembly

• task_id: TASK-18
• status: completed
• changed_files: include/fesa/math/sparse_matrix.hpp, src/fesa/math/sparse_matrix.cpp, include/fesa/assembly/sparse_assembler.hpp, src/fesa/assembly/sparse_assembler.cpp, tests/unit/math/sparse_matrix_test.cpp, tests/unit/assembly/sparse_assembler_test.cpp, src/fesa/CMakeLists.txt, tests/CMakeLists.txt, docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md, phases/linear-static-3d-euler-beam/index.json
• requirement_ids: FESA-REQ-LS3DEB-024, FESA-REQ-LS3DEB-025, FESA-REQ-LS3DEB-034, FESA-REQ-LS3DEB-035
• test_ids: T18-SPARSE-001, T18-SPARSE-002, T18-SPARSE-003, T18-SPARSE-004, T18-SPARSE-005

stage	exact command	exit_code	expected_or_observed_result	evidence_tail
RED-build	cmake --build .harness/build --config Debug --target fesa_tests	1	Exactly five planned tests were registered before production and both sparse public APIs were absent	CMake regenerated, then MSVC C1083 reported missing fesa/assembly/sparse_assembler.hpp and fesa/math/sparse_matrix.hpp from the two new test files
GREEN-build	cmake --build .harness/build --config Debug --target fesa_tests	0	Minimum CSR owner, deterministic assembler, five tests, solver library, and unit executable compile and link	sparse_assembler.cpp, sparse_matrix.cpp, both tests, fesa_solver.lib, and fesa_unit_tests.exe built without a FESA warning under /W4 /WX
GREEN-test	ctest --test-dir .harness/build -C Debug -R SparseAssembly --output-on-failure	0	CSR validation/reduction/zero policy and serial/TBB deterministic beam assembly pass	5/5 exact SparseAssembly 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 explicit-dependency MSVC x64 build tree generates	Windows SDK, oneMKL 2026.1, oneTBB, and HDF5 resolved; configure and generate completed
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 SparseAssembly --output-on-failure	0	Focused Step 18 suite remains green	5/5 exact SparseAssembly tests passed
VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	CTest discovers the accumulated suite and all five exact SparseAssembly names	47 tests discovered, including 5 SparseAssembly tests, with feature/unit labels
VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full accumulated C++ suite has zero failures	47/47 tests passed
VERIFY-contract-scans	Public backend/upward-dependency/PARDISO, assembler shared-CSR-member, dense inheritance, exact-test-count, and CMake registration scans using fail-on-match/count rg wrappers	0	Sparse storage and reduction remain behind the exact approved boundaries	public backend leaks 0; math-header upward dependencies 0; PARDISO matches 0; assembler CSR-member writes 0; dense inheritance 0; tests 5; registrations 2/2
VERIFY-determinism	Exact bytes, reversed completion, serial/TBB, repeated TBB, tuple-cancellation, structural-zero, empty-row, multiply, validation, and symmetry assertions in the targeted suite	0	NR-O02 fixed-order reduction and NR-T11 scheduler independence are observable	one serial, one TBB, one reverse-order, and eight repeated TBB assemblies produced byte-identical row/column/value vectors; duplicate cancellation produced the tuple-ordered literal 1.0
VERIFY-diff	git diff --check 59da6c6	0	The combined base-to-current-worktree Step 18 tracked range has no whitespace errors	Exact tracked scope is 10 files; generated discovery JSON and ignored scratch report are absent from the range
VERIFY-reference	git diff --exit-code -- reference/; git status --short -- reference/	0	Approved legacy reference artifacts remain read-only and unchanged	Reference diff exit 0 and reference status empty

• contract_checks: SparseMatrix is a separate owning CSR type with 0-based row offsets and sorted-unique columns. It validates row-offset shape/range, column range/order/uniqueness, COO dimensions, expected-pattern membership, finite inputs, finite ordered sums, and multiply dimensions. Empty rows and rectangular/zero structural layouts remain valid; every expected slot is emitted even when its exact stored value is zero.
• contract_checks: COO contributions are stable-sorted by exactly (row,column,elementOrder,localOrder) and duplicates are accumulated in that sequence. The cancellation fixture distinguishes tuple order from incoming vector order, and input permutation retains the same result.
• contract_checks: SparseAssembler validates model/DOF dimensions, element references, and scatter ownership before work. It invokes the injected ParallelFor once over stable active-element order; each worker writes only its caller-indexed 144-entry row-major local buffer and failure slot. CSR allocation and reduction occur only after the parallel call.
• contract_checks: the public headers expose no oneTBB, MKL, HDF5, or PARDISO type. SparseMatrix neither includes nor inherits dense Matrix; the math header forward-declares DofManager-owned SparsePattern to avoid a public upward include.
• generated_evidence: .harness/build/src/fesa/Debug/fesa_solver.lib, .harness/build/tests/Debug/fesa_unit_tests.exe
• reference_diff: unchanged; git diff --exit-code -- reference/ exit 0
• handoff: Step 19 can consume canonical full CSR arrays and deterministic matrix-vector multiplication without depending on dense storage, oneTBB, or a solver backend. Step 20 remains solely responsible for PARDISO descriptors, indexing conversion, factorization, and substitution.
• concerns: none; no implementation, environment, backend, or upstream contract conflict was found.

Step 18 Review Fix Round 1 — evidence artifact scope

• classification: evidence/artifact-integrity correction only. Production, public headers, tests, CMake, upstream contracts, and phase-index content were not changed by this review fix.
• reproduced_finding: before correction, git diff --check 59da6c6..HEAD exited 2 with 191 findings (382 output lines), all for trailing whitespace in tracked file .harness/step18-discovery.json. The cumulative changed_files list omitted that tracked file while listing ignored scratch file .superpowers/sdd/linear-static-3d-euler-beam/task-18-report.md as though it were tracked.
• correction: deleted the generated discovery JSON with apply_patch and reconciled changed_files to the exact 10-file combined tracked scope. The ignored scratch report remains supplementary evidence and is not listed as a tracked Step 18 file.
• phase_index_guard: git hash-object phases/linear-static-3d-euler-beam/index.json was 6808d3a8101f656e978b7e00df6cf1a4ad5f1711 before and after correction.

stage	exact command	exit_code	observed_result
REVIEW1-reproduce	git diff --check 59da6c6..HEAD	2	191 findings (382 output lines), all for trailing whitespace, were isolated to the accidental tracked discovery JSON
REVIEW1-scope	git diff --name-status 59da6c6	0	Combined base-to-worktree scope contains exactly 10 tracked Step 18 files; discovery JSON and ignored scratch report are absent
REVIEW1-diff	git diff --check 59da6c6	0	Combined committed plus worktree Step 18 range is whitespace-clean after artifact deletion
REVIEW1-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	Exact MSVC x64 dependency-resolved configuration completed
REVIEW1-build	cmake --build .harness/build --config Debug	0	Full Debug build completed under /W4 /WX without a new warning
REVIEW1-targeted	ctest --test-dir .harness/build -C Debug -R SparseAssembly --output-on-failure	0	Exact SparseAssembly suite passed 5/5
REVIEW1-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full accumulated suite passed 47/47
REVIEW1-reference	git diff --exit-code 59da6c6 -- reference/; git status --short -- reference/	0	Approved reference artifacts remain unchanged and reference status is empty

Step 19 — essential-constraints

• task_id: TASK-19
• status: completed
• changed_files: include/fesa/constraints/essential_constraints.hpp, src/fesa/constraints/essential_constraints.cpp, tests/unit/constraints/essential_constraints_test.cpp, src/fesa/CMakeLists.txt, tests/CMakeLists.txt, docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md, phases/linear-static-3d-euler-beam/index.json
• requirement_ids: FESA-REQ-LS3DEB-007, FESA-REQ-LS3DEB-022, FESA-REQ-LS3DEB-027, FESA-REQ-LS3DEB-034, FESA-REQ-LS3DEB-035
• test_ids: T19-CONSTRAINT-001, T19-CONSTRAINT-002, T19-CONSTRAINT-003, T19-CONSTRAINT-004

stage	exact command	exit_code	expected_or_observed_result	evidence_tail
RED-build	cmake --build .harness/build --config Debug --target fesa_tests	1	Exactly four planned tests were registered before production and the public constraint API was absent	MSVC C1083 reported missing fesa/constraints/essential_constraints.hpp from essential_constraints_test.cpp
GREEN-build	cmake --build .harness/build --config Debug --target fesa_tests	0	Minimum partition/mapping implementation and all four tests compiled and linked	essential_constraints.cpp, its test, fesa_solver.lib, and fesa_unit_tests.exe built without a FESA warning under /W4 /WX
GREEN-test	ctest --test-dir .harness/build -C Debug -R EssentialConstraints --output-on-failure	0	Hand-computed blocks, no/all/mixed constraints, nonzero reconstruction, and invalid dimensions passed	4/4 exact EssentialConstraints 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 explicit-dependency MSVC x64 build tree generates	Windows SDK, oneMKL 2026.1, oneTBB, and HDF5 resolved; configure/generate completed
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 EssentialConstraints --output-on-failure	0	Focused Step 19 suite remains green	4/4 exact EssentialConstraints tests passed
VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	CTest discovers the accumulated suite and all four exact names	51 tests discovered, including 4 EssentialConstraints tests
VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full accumulated C++ suite has zero failures	51/51 tests passed
VERIFY-contract-scans	Public backend and forbidden load/RHS/penalty/MPC scans, exact-test-count scan, git diff --check, and reference status/diff checks	0	Essential partition remains isolated behind backend-free public types	backend leaks 0; forbidden scope 0; exact tests 4; whitespace clean; reference unchanged

• contract_checks: partition validates the input CSR, exact square/full-DOF dimensions, stable increasing free/constrained order, disjoint complete coverage, free-equation correspondence, and prescribed-vector size before extracting any block.
• contract_checks: each full CSR slot maps at most once into Kff/Kfc/Kcf/Kcc. Filtering the stable full rows and sorted columns retains numeric values, local row/column order, and exact structural zeros; every returned block revalidates through the canonical 0-based CSR constructor.
• contract_checks: no/all/mixed constraint cases include valid zero-sized rectangular blocks. gatherFree, gatherConstrained, and reconstructFull reject vector-size mismatch and preserve caller-supplied constrained values exactly, including nonzero prescribed displacement.
• contract_checks: the module does not assemble loads, form an effective RHS, implement penalty/MPC behavior, or expose MKL/oneTBB/HDF5/PARDISO types.
• generated_evidence: .harness/build/src/fesa/Debug/fesa_solver.lib, .harness/build/tests/Debug/fesa_unit_tests.exe
• reference_diff: unchanged; git diff --exit-code -- reference/ exit 0
• handoff: Step 20 may factorize the validated kff; Step 21 may use kfc with DofManager::prescribedValues() to form the nonzero prescribed effective RHS without changing this module's mapping responsibility.
• concerns: none; no critical implementation or upstream contract conflict was found.

Step 20 — mkl-pardiso-solver

• task_id: TASK-20
• status: completed
• changed_files: include/fesa/solvers/linear/linear_solver.hpp, include/fesa/solvers/linear/mkl_pardiso_solver.hpp, src/fesa/solvers/linear/mkl_pardiso_solver.cpp, tests/unit/solvers/linear/linear_solver_test.cpp, tests/unit/solvers/linear/mkl_pardiso_solver_test.cpp, src/fesa/CMakeLists.txt, tests/CMakeLists.txt, docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md, phases/linear-static-3d-euler-beam/index.json
• requirement_ids: FESA-REQ-LS3DEB-025, FESA-REQ-LS3DEB-026, FESA-REQ-LS3DEB-034, FESA-REQ-LS3DEB-035
• test_ids: T20-PARDISO-001, T20-PARDISO-002, T20-PARDISO-003, T20-PARDISO-004, T20-PARDISO-005, T20-PARDISO-006

stage	exact command	exit_code	expected_or_observed_result	evidence_tail
RED-build	cmake --build .harness/build --config Debug --target fesa_tests	1	Exactly six planned tests were registered before production and both solver public APIs were absent	CMake regenerated with all dependencies resolved; MSVC C1083 reported missing fesa/solvers/linear/linear_solver.hpp and fesa/solvers/linear/mkl_pardiso_solver.hpp from the two new test files
GREEN-build	cmake --build .harness/build --config Debug --target fesa_tests	0	Minimum backend boundary, private PARDISO state, six tests, solver library, and unit executable compile and link	mkl_pardiso_solver.cpp, both tests, fesa_solver.lib, and fesa_unit_tests.exe built without a FESA warning under /W4 /WX
GREEN-test	ctest --test-dir .harness/build -C Debug -R MklPardisoSolver --output-on-failure	0	SPD solution, repeated RHS, refactorization, validation/failures, and conditioning behavior pass	6/6 exact MklPardisoSolver 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 explicit-dependency MSVC x64 build tree generates	Windows SDK 10.0.26100.0, oneMKL 2026.1 ILP64/dynamic, oneTBB, and HDF5 resolved; configure/generate completed
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 MklPardisoSolver --output-on-failure	0	Focused Step 20 suite remains green	6/6 exact MklPardisoSolver tests passed
VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	CTest discovers the accumulated suite and all six exact names	57 tests discovered, including 6 MklPardisoSolver tests
VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full accumulated C++ suite has zero failures	57/57 tests passed
VERIFY-contract-scans	Fail-on-match public-header scan for mkl.h, MKL_INT, pardiso, oneTBB, and HDF5 symbols; exact-test-count, git diff --check, and reference diff/status checks	0	The solver backend remains private and Step scope/artifact invariants hold	public PARDISO leaks 0; solver-header backend leaks 0; exact tests 6; whitespace clean; reference unchanged

• contract_checks: LinearSolver exposes only the exact separate factorize(SparseMatrix) and const solve(rhs,solution) boundary. MklPardisoSolver exposes only its constructor, virtual destructor, overrides, and unique_ptr<Impl>; every MKL header/type/handle is confined to the .cpp and private Impl.
• contract_checks: factorization first validates the full square, nonempty, finite, sorted-unique public CSR, full symmetric structure/value tolerance, every diagonal slot, and all size_t to MKL_INT conversions. It then copies only the sorted upper triangle while retaining exact structural-zero diagonals.
• contract_checks: the private adapter uses real SPD mtype=2, explicit phases 11, 22, 33, and -1, iparm[26]=1 matrix checking, and iparm[34]=1 zero-based indexing. A successful factorization is retained for repeated RHS; refactorization and destruction release the previous PARDISO state through the same RAII path. No regularization or fallback is present.
• contract_checks: solve-before-factorize, RHS/solution dimension mismatch, nonfinite RHS/solution, nonsquare/empty/asymmetric/missing-diagonal input, singular or indefinite SPD failure, checker/integer/backend errors, and phase-specific -4/-7 failures return one deterministic FailureCategory::solver diagnostic. The known SPD system meets normalized residual 1e-10 and relative analytical error 1e-9; common-scale and stiffness-ratio sweeps either meet both limits or return the structured solver failure without adding a conditioning threshold.
• generated_evidence: .harness/build/src/fesa/Debug/fesa_solver.lib, .harness/build/tests/Debug/fesa_unit_tests.exe
• reference_diff: unchanged; git diff --exit-code -- reference/ exit 0
• handoff: Step 21 can form the effective free RHS after this adapter has factorized Kff, then call solve repeatedly without refactorization or depending on MKL types.
• concerns: none; no critical implementation, environment, backend, or upstream-contract conflict was found.

Step 20 Review Fix Round 1 — fully constrained lifecycle and normalized validation

• review_classification: Important integration/correctness fixes. Step 19 intentionally produces a valid 0x0 Kff for an all-constrained model, so rejecting that matrix contradicted the accumulated solver workflow.
• test_scope: the existing six MklPardisoSolver test names were retained. The invalid-state test now covers trivial factorize/solve followed by a nonempty refactor, unchanged caller output on failed solves, and a small-scale asymmetric matrix. Numerical helpers now divide by the actual nonzero RHS/expected norm and fail closed for zero or nonfinite norms.

stage	exact command	exit_code	observed_result
RED-zero-equation	cmake --build .harness/build --config Debug; ctest --test-dir .harness/build -C Debug --output-on-failure -R MklPardisoSolver	1	Build passed; 5/6 tests passed and RejectsInvalidCsrStateAndDimensions failed because valid 0x0 Kff factorization returned failure
TEST-hardening	same targeted command after replacing unit-floor norm helpers	1	The same zero-equation production defect remained the only failure; no artificial RED was claimed for already-correct numerical results
GREEN-zero-equation	same targeted command after the minimum production change	0	6/6 passed; empty factorize/solve avoids PARDISO and a following nonempty refactor solves correctly
RED-scaled-symmetry	cmake --build .harness/build --config Debug; ctest --test-dir .harness/build -C Debug --output-on-failure -R MklPardisoSolver	1	Build passed; 5/6 tests passed and the existing invalid-state test showed that a scaled asymmetric matrix was incorrectly accepted
GREEN-scaled-symmetry	same targeted command after the minimum production change	0	6/6 passed with symmetry normalized by the matrix's actual maximum absolute entry and no unit-size floor
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	Explicit MSVC x64 dependencies configured and generated successfully
VERIFY-build/targeted	cmake --build .harness/build --config Debug; ctest --test-dir .harness/build -C Debug --output-on-failure -R MklPardisoSolver	0	Debug build completed without a new warning; exact Step 20 suite passed 6/6
VERIFY-discovery/full	ctest --test-dir .harness/build -C Debug --show-only=json-v1; ctest --test-dir .harness/build -C Debug --output-on-failure	0	57 tests discovered and 57/57 passed
VERIFY-contract	backend API leak scan, exact-test count, forbidden fallback/regularization scan, git diff --check, and reference diff/status	0	backend API leaks 0; exact tests 6; forbidden implementation matches 0; whitespace clean; reference/ unchanged

• production_fix: a successful zero-equation factorization is represented as trivial private state without allocating or calling PARDISO; empty solve succeeds only after that observable factorization. The ordinary release() path safely clears this state before later refactorization or destruction.
• production_fix: symmetry requires every reverse structural pair and compares abs(aij-aji) to 1e-12 * max(abs(A)). An exactly zero matrix uses an exact zero difference check; SparseMatrix validation remains responsible for rejecting nonfinite values.
• failure_atomicity: solve-before-factorize, dimension mismatch, and nonfinite RHS failures are asserted to leave the caller's solution values unchanged; successful backend output is still copied from a private candidate only after phase 33 and finite-result validation.
• evidence_hygiene: two intermediate symmetry RED attempts were discarded because a concurrent clean build locked MSBuild files. The uncontended RED above reproduced the production defect deterministically and is the recorded evidence.
• phase_index: intentionally unchanged during this review fix; hash 2cfb6ee5e0c49fbf6b06d27cb33ec9ac2c34dbc4.
• supersession: this review section supersedes the original Step 20 statements that the factorized CSR must be nonempty or that empty input is rejected.
• concerns: none; the transient build contention was resolved before recorded RED/GREEN/VERIFY runs and no critical or upstream blocker remains.

Step 21 — load-assembly

• task_id: TASK-21
• status: completed
• changed_files: include/fesa/assembly/load_assembler.hpp, src/fesa/assembly/load_assembler.cpp, tests/unit/assembly/load_assembler_test.cpp, src/fesa/CMakeLists.txt, tests/CMakeLists.txt, docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md, phases/linear-static-3d-euler-beam/index.json
• requirement_ids: FESA-REQ-LS3DEB-007, FESA-REQ-LS3DEB-011, FESA-REQ-LS3DEB-027, FESA-REQ-LS3DEB-034
• test_ids: T21-LOAD-001, T21-LOAD-002, T21-LOAD-003, T21-LOAD-004, T21-LOAD-005

stage	exact command	exit_code	expected_or_observed_result	evidence_tail
RED-build	cmake --build .harness/build --config Debug --target fesa_tests	1	Exactly five planned tests were registered before production and the public load API was absent	MSVC C1083 reported missing fesa/assembly/load_assembler.hpp from load_assembler_test.cpp
GREEN-build	cmake --build .harness/build --config Debug --target fesa_tests	0	Minimum nodal load/effective RHS implementation and all five tests compiled and linked	load_assembler.cpp, its test, fesa_solver.lib, and fesa_unit_tests.exe built without a FESA warning under /W4 /WX
GREEN-test	ctest --test-dir .harness/build -C Debug -R LoadAssembly --output-on-failure	0	Node/set loads, source-order accumulation, nonzero prescribed RHS, rejection, and zero cases pass	5/5 exact LoadAssembly 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 explicit-dependency MSVC x64 build tree generates	Windows SDK 10.0.26100.0, oneMKL 2026.1 ILP64/dynamic, oneTBB, and HDF5 resolved; configure/generate completed
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 LoadAssembly --output-on-failure	0	Focused Step 21 suite remains green	5/5 exact LoadAssembly tests passed
VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	CTest discovers the accumulated suite and all five exact names	62 tests discovered, including 5 LoadAssembly tests
VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full accumulated C++ suite has zero failures	62/62 tests passed
VERIFY-contract-scans	Exact-test-count, public-backend, factorization/solve/distributed-load, whitespace, and reference diff/status scans	0	Load/RHS scope and backend boundary remain isolated	exact tests 5; public backend leaks 0; forbidden scope 0; whitespace clean; reference unchanged

• contract_checks: semantic node label/node-set targets resolve case-insensitively to unique stable node indices. All six global components use DofManager full order, constrained loads remain in the full vector, and duplicate CLOAD rows accumulate strictly in active source order; a cancellation fixture proves that the implementation does not reorder floating-point additions.
• contract_checks: model/full/free/constrained/prescribed dimensions, stable DOF partition/equation order, active-load order, target indices, component range, and finite individual inputs are validated before use. Nonfinite source-order load sums, Kfc*dc products/row sums, and final subtraction fail closed with one structured model diagnostic.
• contract_checks: effective RHS is exactly the stable gather of Ff minus CSR row-order Kfc*dc; hand-computed nonzero dc, zero-load, zero-free, and zero-constrained cases pass. No factorization/substitution call, distributed load object, *DLOAD, or line-load behavior was added.
• contract_checks: the public header exposes only the two approved static LoadAssembler functions and no MKL, oneTBB, HDF5, or PARDISO type.
• generated_evidence: .harness/build/src/fesa/Debug/fesa_solver.lib, .harness/build/tests/Debug/fesa_unit_tests.exe
• reference_diff: unchanged; git diff --exit-code -- reference/ exit 0
• handoff: Step 22 can consume the full external force and effective free RHS; Step 24 retains ownership of factorize-before-load orchestration, substitution, reconstruction, recovery, and output sequencing.
• concerns: none; no critical implementation, environment, backend, or upstream-contract conflict was found.

Step 22 — result-recovery

• task_id: TASK-22
• status: completed
• changed_files: include/fesa/results/result_recovery.hpp, src/fesa/results/result_recovery.cpp, tests/unit/results/result_recovery_test.cpp, src/fesa/CMakeLists.txt, tests/CMakeLists.txt, docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md, phases/linear-static-3d-euler-beam/index.json
• requirement_ids: FESA-REQ-LS3DEB-004, FESA-REQ-LS3DEB-027, FESA-REQ-LS3DEB-031, FESA-REQ-LS3DEB-032, FESA-REQ-LS3DEB-034, FESA-REQ-LS3DEB-035, FESA-REQ-LS3DEB-042
• test_ids: T22-RECOVERY-001, T22-RECOVERY-002, T22-RECOVERY-003, T22-RECOVERY-004, T22-RECOVERY-005, T22-RECOVERY-006

stage	exact command	exit_code	expected_or_observed_result	evidence_tail
RED-build	cmake --build .harness/build --config Debug --target fesa_tests	1	Exactly six planned tests were registered before production and the recovery public API was absent	MSVC C1083 reported missing fesa/results/result_recovery.hpp from result_recovery_test.cpp
GREEN-build	cmake --build .harness/build --config Debug --target fesa_tests	0	Recovery, station normalization, six tests, solver library, and unit executable compile and link	result_recovery.cpp, its test, fesa_solver.lib, and fesa_unit_tests.exe built without a FESA warning under /W4 /WX
GREEN-test	ctest --test-dir .harness/build -C Debug -R ResultRecovery --output-on-failure	0	Residual reaction, residual criterion, distinct result types, signs, stress order, and station policy pass	6/6 exact ResultRecovery tests passed
RED-state-consistency	cmake --build .harness/build --config Debug --target fesa_tests; ctest --test-dir .harness/build -C Debug -R ResultRecovery.EnforcesNormalizedFreeResidual --output-on-failure	1	A constrained displacement inconsistent with prescribed dc must fail before residual evaluation	Test expected invalid-recovery-state but observed later free-residual-tolerance-failure, proving missing prevalidation
GREEN-state-consistency	same focused build/test command after the minimum validation change	0	Prescribed-order/state consistency fails before recovery and the exact zero-load/zero-displacement equilibrium remains valid	Focused test passed; subsequent exact suite passed 6/6
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 explicit-dependency MSVC x64 build tree generates	Windows SDK 10.0.26100.0, oneMKL 2026.1 ILP64/dynamic, oneTBB, and HDF5 resolved; configure/generate completed
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 ResultRecovery --output-on-failure	0	Focused Step 22 suite remains green	6/6 exact ResultRecovery tests passed
VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	CTest discovers the accumulated suite and all six exact names	68 tests discovered, including 6 ResultRecovery tests
VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full accumulated C++ suite has zero failures	68/68 tests passed
VERIFY-contract-scans	Exact-test-count, public-backend, forbidden shear/averaging, whitespace, and reference diff/status scans	0	Recovery scope and adapter/reference boundaries remain isolated	exact tests 6; public backend leaks 0; forbidden scope 0; whitespace clean; reference unchanged

• contract_checks: full internalForce=K*d and residual=internalForce-externalForce are computed as private candidates; the full residual is preserved in reaction so free residual evidence remains visible and constrained entries are the physical support reactions. No endpoint-action summation participates in reaction recovery.
• contract_checks: the free residual uses ||r_f||/max(||Fint_f||,||Fext_f||) with no unit floor. A positive physical denominator must meet 1e-10; exact zero numerator/denominator is accepted as zero-load equilibrium, while nonfinite arithmetic fails closed.
• contract_checks: dimensions, finite input, stable free/constrained order, exact prescribed displacement, active entity references, and twelve-DOF scatters are checked before computing candidates. Internal/residual/reaction vectors and endpoint/Gauss/stress rows replace AnalysisState only after all elements recover finite results, so failure is atomic.
• contract_checks: active element order produces endpoint 0,1, Gauss 1,2, and element/Gauss/section stress order. Equilibrium end action [FX,FY,FZ,MX,MY,MZ], endpoint [N,T,My,Mz], Gauss strain/resultant, and section-point/default-centroid S11 remain distinct.
• contract_checks: node-station projection requires exact endpoint row identity, a two-endpoint unloaded interior chain, identical section and local axes, finite component tolerances [N,T,My,Mz], and agreement before selecting the smaller stable element ID. Positive-local-x section-cut rows compare directly and are never averaged; reversed, branched, loaded, section-jump, nonfinite, and mismatch cases fail structurally.
• generated_evidence: .harness/build/src/fesa/Debug/fesa_solver.lib, .harness/build/tests/Debug/fesa_unit_tests.exe
• reference_diff: unchanged; git diff --exit-code -- reference/ exit 0
• handoff: Step 23 can serialize the stable nodal vectors and distinct endpoint/Gauss/stress rows; Step 24 reference tooling can reuse normalizeSectionResultantsToNodeStations without backend or HDF5 types.
• concerns: none; no critical implementation, environment, numerical, or upstream-contract conflict was found.

Step 22 Review Fix Round 1 — full-space free-residual visibility

• review_trigger: the approved I/O contract requires Reaction at every node and component, including the accepted free-DOF residual; the AnalysisState storage comment likewise makes reaction a full-index residual view.
• RED-test: cmake --build .harness/build --config Debug --target fesa_tests; ctest --test-dir .harness/build -C Debug -R '^ResultRecovery.EnforcesNormalizedFreeResidual$' --output-on-failure built successfully and exited 1 in CTest. The accepted below-tolerance free residual was -1.000000082740371e-09, while its reaction entry was 0.
• production_fix: the private reaction candidate is now a full copy of residual=K*d-F. Constrained entries remain the physical reactions, free entries retain residual evidence, and element end actions are still never summed into reaction.
• GREEN-focused: the same focused build/test command exited 0 and passed 1/1 after the minimum production change.
• VERIFY-build: cmake --build .harness/build --config Debug exited 0 under MSVC x64 Debug with no new FESA warning.
• VERIFY-targeted: ctest --test-dir .harness/build -C Debug -R ResultRecovery --output-on-failure exited 0 and passed the unchanged exact six names 6/6.
• VERIFY-discovery-full: ctest --test-dir .harness/build -C Debug --show-only=json-v1 discovered 68 tests, exactly six ResultRecovery tests; full ctest --test-dir .harness/build -C Debug --output-on-failure exited 0 and passed 68/68.
• failure_atomicity: the existing tolerance-failure branch in ResultRecovery.EnforcesNormalizedFreeResidual still proves prior internal, residual, reaction, and endpoint state remains unchanged on failure.
• supersession: this review section records the historical pre-fix finding that implementation and report originally kept only constrained residual entries. The final Step 22 contract above now states that reaction is the full residual dataset; only constrained entries are physical reactions.
• phase_index: the review-fix worker intentionally left phase metadata unchanged. After independent root verification, finalization preserved exact started_at=2026-08-09T20:42:15+0900, added completed_at=2026-08-09T21:14:47+0900, and updated the summary to state the corrected full-residual reaction contract.
• evidence_hygiene: an initial parallel VERIFY/audit wrapper terminated before product commands because its PowerShell count expression was malformed. It is excluded from TDD and product VERIFY evidence; the recorded evidence is the subsequent uncontended serial build, targeted, discovery, full sequence followed by a separate successful audit command.
• concerns: none; no upstream-contract conflict or critical blocker remains.

Step 23 — hdf5-results-writer

• task_id: TASK-23
• status: completed
• changed_files: include/fesa/results/results_writer.hpp, include/fesa/io/hdf5/hdf5_results_writer.hpp, src/fesa/io/hdf5/hdf5_results_writer.cpp, tests/unit/results/results_writer_test.cpp, tests/unit/io/hdf5/hdf5_results_writer_test.cpp, src/fesa/CMakeLists.txt, tests/CMakeLists.txt, cmake/FesaDependencies.cmake, docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md, phases/linear-static-3d-euler-beam/index.json
• requirement_ids: FESA-REQ-LS3DEB-003, FESA-REQ-LS3DEB-015, FESA-REQ-LS3DEB-019, FESA-REQ-LS3DEB-020, FESA-REQ-LS3DEB-023, FESA-REQ-LS3DEB-025, FESA-REQ-LS3DEB-028, FESA-REQ-LS3DEB-029, FESA-REQ-LS3DEB-030, FESA-REQ-LS3DEB-031, FESA-REQ-LS3DEB-032, FESA-REQ-LS3DEB-034
• test_ids: T23-HDF5-001, T23-HDF5-002, T23-HDF5-003, T23-HDF5-004, T23-HDF5-005

stage	exact command	exit_code	expected_or_observed_result	evidence_tail
RED-build	cmake --build .harness/build --config Debug --target fesa_tests	1	All five ledger tests were registered before either public production header existed	MSVC C1083 reported missing fesa/results/results_writer.hpp and fesa/io/hdf5/hdf5_results_writer.hpp
INFRA-link	cmake --build .harness/build --config Debug --target fesa_tests	1	Production and tests compiled, but the packaged static HDF5 target could not link in this environment	LNK1104 reported missing libircmt.lib; this is infrastructure evidence, not the feature RED
INFRA-runtime-discovery	cmake --build .harness/build --config Debug --target fesa_tests	1	Shared HDF5 linked after normalized-target repair, but post-build GoogleTest discovery could not load a transitive runtime	discovery exited 0xc0000135; dumpbin /dependents hdf5.dll identified libmmd.dll
GREEN-build	cmake --build .harness/build --config Debug --target fesa_tests	0	Minimum schema-v0 writer, tests, solver library, and unit executable compile/link after the approved runtime repair	hdf5_results_writer.cpp and both tests built under /W4 /WX; required runtime DLLs were staged before discovery
GREEN-test	ctest --test-dir .harness/build -C Debug -R Hdf5ResultsWriter --output-on-failure	0	Exact schema, mandatory outputs, diagnostics/centroid, failure preservation, and successful replacement pass	5/5 exact Hdf5ResultsWriter 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 explicit-dependency MSVC x64 build tree generates	Visual Studio 18/MSVC x64, Windows SDK 10.0.26100.0, oneMKL, oneTBB, and shared HDF5 resolved; configure/generate completed
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 Hdf5ResultsWriter --output-on-failure	0	Focused Step 23 suite remains green	5/5 exact Hdf5ResultsWriter tests passed
VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	0	CTest discovers the accumulated suite and all five exact ledger names	73 tests discovered, including exactly 5 Hdf5ResultsWriter tests
VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full accumulated C++ suite has zero failures	73/73 tests passed in 2.75 seconds
VERIFY-runtime	& 'C:\Program Files\Microsoft Visual Studio\18\Community\VC\Tools\MSVC\14.51.36231\bin\Hostx64\x64\dumpbin.exe' /dependents 'C:\Program Files\HDF_Group\HDF5\2.1.1\bin\hdf5.dll'	0	The package DLL's undeclared Intel runtime requirement is traceable	dependencies include libmmd.dll; the WIN32 staging guard copies ${OMP_DLL_DIR}/libmmd.dll
VERIFY-contract-scans	Public HDF5/Win32 type scan, exact-test count, finalizer/RAII scope scan, forbidden shear/averaging/filter scan, git diff --check, and reference diff/status	0	Backend boundary, exact mandatory-output scope, atomic finalization, and reference immutability remain isolated	public backend leaks 0; exact tests 5; checked file closes and exact Replace/Move split present; forbidden scope 0; whitespace clean; reference unchanged

• contract_checks: ResultsWriter and Hdf5ResultsWriter expose only the approved backend-free signatures. HDF5, Win32 handles, macros, RAII wrappers, schema construction, self-check, and atomic finalization stay private to the implementation; Fesa::HDF5 is linked privately.
• contract_checks: schema v0 writes every literal metadata, model, and /steps/Step-1/frames/0 path, including generalized_resultant. Numeric fields use IEEE little-endian float64, stable identities use little-endian uint64 compound members, text uses UTF-8 variable-length strings, and exact component/unit/coordinate/location/step/frame attributes are pinned.
• contract_checks: non-axis-aligned element axes, node/element identity, connectivity, and representative first/last nonzero values for displacement, reaction, end action, section resultant, generalized strain, and generalized resultant prove solved state is connected to output. Output requests do not filter any mandatory field; shear/averaged stress was not added.
• contract_checks: diagnostics are stable-sorted and preserved, an empty input produces an exact zero-row compound dataset, and the default centroid stress row serializes axial S11 only. Dimensions, row identity/order, source identity, and all numeric values are validated before finalization.
• atomicity: a unique same-directory temporary file is fully written, flushed, checked-closed, reopened read-only for exact schema self-check, and checked-closed before finalization. Existing finals use only ReplaceFileW(final,temp,nullptr,...); new finals use only MoveFileExW(temp,final,MOVEFILE_WRITE_THROUGH). Failure removes the temp, leaves no partial new final, and preserves pre-existing final bytes.
• infrastructure_resolution: the approved normalized HDF5 dependency now prefers the package shared target, with static and HDF5::HDF5 fallbacks. Tests stage $<TARGET_RUNTIME_DLLS:fesa_unit_tests> plus the package DLL's verified ${OMP_DLL_DIR}/libmmd.dll dependency without directly naming an HDF5 package target or hardcoding an Intel installation path.
• generated_evidence: .harness/build/src/fesa/Debug/fesa_solver.lib, .harness/build/tests/Debug/fesa_unit_tests.exe; all test HDF5/temp artifacts are confined to build-tree temporary directories and cleaned by their owners.
• reference_diff: unchanged; git diff --exit-code -- reference/ and git status --short -- reference/ both report no change.
• handoff: Step 24 can construct the backend-free writer and rely on mandatory schema-v0 output and fail-atomic replacement. Its production executable must stage the selected HDF5 target runtime DLLs and ${OMP_DLL_DIR}/libmmd.dll with the same portable target-expression/runtime-guard policy used by tests.
• concerns: no remaining critical implementation or upstream-contract blocker. The HDF5 static-link and shared-runtime environment blockers were resolved and are recorded separately from the valid missing-API RED.

Step 24 — linear-static-cli

• task_id: TASK-24
• status: completed
• changed_files: include/fesa/analysis/linear_static_analysis.hpp, src/fesa/analysis/linear_static_analysis.cpp, include/fesa/app/fesa_application.hpp, src/fesa/app/fesa_application.cpp, src/fesa/app/main.cpp, tests/integration/analysis/linear_static_analysis_test.cpp, tests/integration/app/fesa_application_test.cpp, tests/reference/reference_comparison.hpp, tests/reference/reference_comparison.cpp, tests/reference/reference_comparison_test.cpp, tests/reference/b33_reference_comparison_test.cpp, src/fesa/CMakeLists.txt, tests/CMakeLists.txt, docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md, phases/linear-static-3d-euler-beam/index.json
• requirement_ids: FESA-REQ-LS3DEB-001, FESA-REQ-LS3DEB-002, FESA-REQ-LS3DEB-005, FESA-REQ-LS3DEB-020, FESA-REQ-LS3DEB-026, FESA-REQ-LS3DEB-028, FESA-REQ-LS3DEB-030, FESA-REQ-LS3DEB-032, FESA-REQ-LS3DEB-033, FESA-REQ-LS3DEB-034, FESA-REQ-LS3DEB-036 through FESA-REQ-LS3DEB-044
• test_ids: T24-ORCH-001, T24-ORCH-002, T24-CLI-001, T24-CLI-002, T24-CLI-003, T24-REF-001, T24-REF-002, T24-REF-003, T24-REF-004, T24-B33-001

stage	exact command	exit_code	expected_or_observed_result	evidence_tail
RED-build	cmake --build .harness/build --config Debug --target fesa_tests	1	Exact ten tests were registered while orchestration, CLI, and comparator APIs were absent	MSVC C1083 reported only missing fesa/analysis/linear_static_analysis.hpp, fesa/app/fesa_application.hpp, and reference_comparison.hpp; the pre-existing unit target still built
RED-targeted	`ctest --test-dir .harness/build -C Debug -R "LinearStaticCli	ReferenceComparisonContract	B33ReferenceComparison" --output-on-failure`	0
GREEN-build	cmake --build .harness/build --config Debug --target fesa_tests	0	Minimal production lifecycle, application boundary, test-only comparator, and all three test executables compile/link	fesa_solver.lib, fesa_unit_tests.exe, fesa_integration_tests.exe, and fesa_reference_tests.exe built without a FESA warning under /W4 /WX
GREEN-targeted	`ctest --test-dir .harness/build -C Debug -R "LinearStaticCli	ReferenceComparisonContract	B33ReferenceComparison" --output-on-failure`	0
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 explicit-dependency MSVC x64 build tree generates	Visual Studio 18/MSVC x64, Windows SDK 10.0.26100.0, oneMKL 2026.1, oneTBB, and shared HDF5 resolved
VERIFY-build	cmake --build .harness/build --config Debug	0	Full Debug build includes the actual CLI and all test executables	.harness/build/src/fesa/Debug/fesa.exe built under /W4 /WX; selected MKL/TBB/HDF5/Intel runtime DLLs were staged beside it
VERIFY-targeted	`ctest --test-dir .harness/build -C Debug -R "LinearStaticCli	ReferenceComparisonContract	B33ReferenceComparison" --output-on-failure`	0
VERIFY-discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1 plus JSON count audit	0	All accumulated and exact Step 24 tests are discovered	83 total tests, exactly 10 Step 24 names
VERIFY-full	ctest --test-dir .harness/build -C Debug --output-on-failure	0	Full accumulated C++ suite has zero failures	83/83 tests passed
VERIFY-cli	.harness/build/src/fesa/Debug/fesa.exe "reference/cantilever beam/cantilever beam.inp" --output .harness/build/cli-smoke-step24/results.h5	0	The actual executable strips argv[0], runs the approved pipeline, and writes HDF5	Process exit 0; results.h5 exists and is 25,336 bytes; an empty-argument process smoke test returned exact usage exit 2
VERIFY-determinism	Run exact B33ReferenceComparison twice and hash comparison.json after each run	0	Build-local comparison evidence is byte deterministic	Both runs passed 1/1 and produced SHA-256 258347AEA791D981AEA9B2BCAD85DE5344D4859ECA3692DC5E7AA01A848F8E0D
VERIFY-contract-scans	Exact-test count, public-backend, forbidden-scope, reference-write, whitespace, and reference diff/status scans	0	Approved module and artifact boundaries remain isolated	exact tests 10; public backend leaks 0; B31/DLOAD/fallback/averaging scope 0; comparator has only its JSON output writer; diff clean; reference unchanged

• contract_checks: Analysis::run invokes the exact eight hook stages and returns immediately on failure. LinearStaticAnalysis keeps the immutable Domain alive under the non-owning AnalysisModel, owns the DOF/state/matrix handoff, and calls factorize(Kff) before any nodal load assembly. Solve is substitution-only, followed by full reconstruction, recovery, and the injected ResultsWriter.
• contract_checks: FesaApplication::run receives argv[0]-excluded operands, accepts only <input> or <input> --output <output>, defaults to the current directory results.h5, constructs TBB/MKL/HDF5 adapters behind their public boundaries, emits seven deterministic diagnostic fields, and returns exact process codes 0/2/3/4/5/6. Domain warnings remain in the HDF5 diagnostics and output requests do not filter mandatory result datasets.
• contract_checks: the test-only comparator opens the exact legacy four-file bundle and authoritative HDF5 read-only, requires B33/schema/source/row identity/finite values before comparison, and produces exactly 176 stable decisions plus 16 component metrics. It uses Abaqus-only component scales, exact SI floors, no zero clamp/drop, and Step 22 endpoint consistency before selecting the smaller element identity without averaging.
• generated_evidence: .harness/build/src/fesa/Debug/fesa.exe, .harness/build/reference/cantilever-beam-b33/results.h5 (25,336 bytes), .harness/build/reference/cantilever-beam-b33/comparison.json (128,118 bytes). The report has passed=true, 0 failed rows, 176 matched rows, 16 metrics, stress comparison N/A, and worst normalized error 0.026602795021994977 (UZ).
• physics_evidence: free residual norm 9.356339321107032e-7; applied force [0,0,-1000000]; reaction force [0,0,999999.9999998808]; applied moment about origin [0,10000000,0]; reaction moment about origin [0,-9999999.999997258,0]; endpoint consistency passed.
• reference_diff: unchanged; git diff --exit-code -- reference/ and git status --short -- reference/ both report no change. Contract-fixture mutations occur only under .harness/build/reference/contract-fixtures/.
• handoff: Step 25 can independently rebuild and execute all 83 tests. Step 26 can rerun the already-built exact B33 CTest and consume the deterministic comparison.json without changing source, tests, tolerances, or references; Step 27 can consume only its physics_evidence after Step 26 passes.
• concerns: none; no critical implementation, environment, numerical, or upstream-contract blocker remains.

Step 24 Review Fix Round 1 — option-token output rejection

• review_trigger: the approved CLI contract classifies repeated --output and every unknown option as usage error exit 2. The original three-argument parser treated the value position as an arbitrary nonempty path, so an option token could advance into input analysis instead.
• RED-repeated-option: after adding {missingInput,"--output","--output"} to the existing exact LinearStaticCli.ReturnsEveryExactExitCodeAndOrderedDiagnostic test, cmake --build .harness/build --config Debug --target fesa_integration_tests exited 0 and the focused CTest exited 1. Actual exit was 3 and stderr contained no cli-usage, rather than expected exit 2.
• GREEN-repeated-option: rejecting the literal repeated token made the same focused test pass 1/1.
• RED-unknown-option: the reviewer then identified the general unknown-option case. Adding {missingInput,"--output","--bogus"} before broadening the production condition again produced build exit 0 and focused CTest exit 1; actual exit was 3 with no cli-usage.
• production_fix: explicit output form now requires a nonempty third argument that does not begin with -. Both a repeated known option and an unknown option token are rejected before any input or output access, while ordinary output paths retain the approved behavior.
• GREEN-focused: rebuilding fesa_integration_tests exited 0 under /W4 /WX; the unchanged exact focused test passed 1/1 with both option cases pinned.
• independent_review: Critical 0, unresolved Important 0. The reviewer reran exact Step 24 10/10, discovery 83, full 83/83, comparison 176 rows/16 metrics passed, and reference diff/status clean.
• remaining_minor: the test-only comparator independently pins float64 result file types but relies on the Step 23 writer self-check/full-suite schema test for exact uint64 endianness and every compound member file dtype/UTF-8. This is defense-in-depth negative coverage, not a reproducible approved-pipeline false pass.
• remaining_minor: the inherited diagnostic sorter is not a literal implementation of future multi-source declaration/internal-ID ordering, but no V0 single-input CLI misordering is reproducible.
• remaining_minor: the Step 23 libmmd.dll guard remains unconditional across alternate HDF5 targets; it is correct for the approved shared-HDF5 environment and is an external portability limitation.