FESADev/.codex/skills/fesa-cpp-msvc-tdd/SKILL.md

name, description

name	description
fesa-cpp-msvc-tdd	Use when planning, implementing, validating, or correcting FESA solver C++17 MSVC CMake CTest work with TDD, build/test failure triage, or implementation-plan handoffs.

FESA C++ MSVC TDD

Use this skill to keep FESA C++ implementation work test-first, MSVC-compatible, and bounded by approved upstream contracts.

Inputs

Read these first:

• AGENTS.md
• docs/SOLVER_AGENT_DESIGN.md
• docs/implementation-plans/README.md
• docs/build-test-reports/README.md
• docs/corrections/README.md
• docs/implementation-plans/<feature-id>-implementation-plan.md
• Related requirements, formulation, numerical review, I/O definition, and reference model documents

Workflow

1. For planning, convert upstream documents into small ordered tasks and test ids.
2. For implementation, follow RED -> GREEN -> VERIFY.
3. RED: write the planned unit, integration, parser/I/O, or reference-comparison test first.
4. RED: run the targeted test and verify the expected failure before production code.
5. GREEN: implement the minimum C++17/MSVC-compatible code needed for the task.
6. VERIFY: run the targeted command, then python scripts/validate_workspace.py.
7. For C++ production changes, require a related C++ test file in the same patch or already present.
8. For failure triage, classify as configure | compile | link | test | reference-comparison | harness | environment | upstream-contract.
9. Fix implementation-owned failures only and keep changes traceable to the implementation plan.

Output Contract

Produce one of these, depending on role:

• docs/implementation-plans/<feature-id>-implementation-plan.md
• Implementation report with RED/GREEN/VERIFY evidence
• docs/build-test-reports/<feature-id>-build-test.md
• docs/corrections/<feature-id>-correction.md

Required validation commands:

python -m unittest discover -s scripts -p "test_*.py"
python scripts/validate_workspace.py
ctest -C Debug -R <feature-or-label>

Default MSVC path:

cmake -S . -B build/msvc-debug -G "Visual Studio 17 2022" -A x64
cmake --build build/msvc-debug --config Debug
ctest --test-dir build/msvc-debug --output-on-failure -C Debug

Boundaries

• Do not change requirements.
• Do not change formulations.
• Do not change I/O contracts.
• Do not change numerical review reports.
• Do not change reference artifacts.
• Do not change tolerance policies.
• Do not run Abaqus, Nastran, or any reference solver.
• Do not generate reference CSVs.
• Do not approve release readiness.

Quality Gate

• Every must requirement maps to at least one task and one test.
• Each test has a clear RED condition, GREEN condition, linked task, and command.
• CMake/CTest plans remain compatible with MSVC x64 Debug validation.
• Build/test reports record command, exit code, duration, stdout/stderr tail, and failure classification.
• Correction attempts stop when repeated failure indicates upstream contract ambiguity.

Handoff

Send passing build/test evidence to Reference Verification Agent. Send implementation-owned failures to Correction Agent. Send upstream-contract failures to the owning upstream agent through Coordinator Agent.