FESADev/phases/1-linear-static-mitc4-rebaseline/step3.md

Sprint Contract: Parser Domain Subset

Objective

Revalidate and repair the Phase 1 Abaqus parser and Domain model against the documented subset while preserving strict rejection of unsupported reference features.

Required Reading

• /AGENTS.md
• /docs/ARCHITECTURE.md
• /docs/ADR.md
• /docs/ABAQUS_INPUT_SUBSET.md
• /docs/VERIFICATION_PLAN.md
• /docs/MITC4_FORMULATION.md

Scope

• Parse Phase 1 keywords into immutable Domain objects.
• Preserve node, element, set, material, shell section, boundary, load, and step definitions.
• Reject S4R, Part/Assembly/Instance, *Include, NLGEOM=YES, nonzero prescribed displacement, and unsupported material/section modes.

Allowed Files

• include/
• src/
• tests/
• docs/ABAQUS_INPUT_SUBSET.md only for clarifying parser contract
• PLAN.md
• PROGRESS.md

Explicit Non-Goals

• Do not implement analysis or assembly.
• Do not add Part/Assembly/Instance support because quad_02 contains it.
• Do not normalize reference files in parser code.

Tests To Write First

• Parser acceptance tests for every Phase 1 keyword.
• Generated and explicit *Nset and *Elset tests.
• Unsupported feature rejection tests for S4R, Part, Assembly, Instance, *Density, and NLGEOM=YES.
• Line-numbered diagnostic tests for malformed numeric and DOF fields.

Reference Artifacts

• references/quad_01.inp as unsupported provenance.
• references/quad_02.inp as unsupported original provenance until normalized or parser scope changes.

Acceptance Commands

python scripts/validate_workspace.py

Evaluator Checklist

• Parser behavior matches docs/ABAQUS_INPUT_SUBSET.md.
• TYPE=S4 maps to internal MITC4.
• Unsupported stored references are not silently accepted.
• Domain objects do not own equation numbers.

Handoff Requirements

• Update PROGRESS.md with parser status.
• Update PLAN.md for unresolved reference compatibility work.

Do Not

• Do not broaden the parser subset without ADR and doc updates.