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# 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.
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