# Step 4: material-step-load-parser

## Read First

Read these files before editing:

- `/AGENTS.md`
- `/docs/PRD.md`
- `/docs/ARCHITECTURE.md`
- `/docs/ADR.md`
- `/docs/io-definitions/abaqus-input-parser-io.md`
- `/src/fesa/model/material.hpp`
- `/src/fesa/model/analysis_step.hpp`
- `/src/fesa/model/boundary_condition.hpp`
- `/src/fesa/model/load.hpp`
- `/src/fesa/io/abaqus/input_parser.hpp`
- `/src/fesa/io/abaqus/input_parser.cpp`

Review completed parser and model tests first.

## Task

Extend the parser for the V0 material and history data subset.

Required behavior:

- Parse `*MATERIAL, NAME=<name>` and `*ELASTIC` data into the internal material
  representation. If the current `Material` model cannot store elastic data,
  add the smallest semantic extension with tests.
- Parse `*STEP` and `*STATIC` into ordered `AnalysisStep` definitions.
- Parse `*BOUNDARY` rows into step boundary conditions using existing
  `DofComponent` mapping.
- Parse `*CLOAD` rows into step concentrated loads using existing
  `DofComponent` mapping.
- Parse `*OUTPUT`, `*NODE OUTPUT`, and `*ELEMENT OUTPUT` only to the extent
  documented in the I/O contract. If semantic storage is not yet present, record
  an explicit ignored-with-warning diagnostic rather than inventing output model
  APIs.

## Tests To Write First

Add focused C++ tests before production code:

- model tests for any new material or output request semantic fields;
- parser tests for material/elastic, step/static, boundary, and cload rows.

Run targeted CTest and confirm the tests fail before implementation.

## Acceptance Criteria

```powershell
ctest --test-dir build/msvc-debug --output-on-failure -C Debug -R "(model_|abaqus_input_parser_)"
python -m unittest discover -s scripts -p "test_*.py"
python scripts/validate_workspace.py
```

## Verification Procedure

Update step 4 status with summary or a concrete error/blocked reason.

## Forbidden

- Do not implement analysis execution, assembly, HDF5 writing, or reference
  comparison in this step.
- Do not mutate reference artifacts.