FESADev/phases/1-linear-static-mitc4-rebaseline/step13.md

Sprint Contract: Linear Static Workflow

Objective

Rebuild or verify the full linear static workflow from parsed Domain to AnalysisModel, AnalysisState, solve, U and RF result fields.

Required Reading

• /AGENTS.md
• /docs/ARCHITECTURE.md
• /docs/ADR.md
• /docs/RESULTS_SCHEMA.md
• /docs/NUMERICAL_CONVENTIONS.md
• /docs/MITC4_FORMULATION.md

Scope

• Build the active AnalysisModel for one linear static step.
• Run the template workflow: build DOF map, assemble, apply constraints, solve, reconstruct full vectors, recover RF, write results.
• Keep Domain immutable and AnalysisState mutable.

Allowed Files

• include/
• src/
• tests/
• PLAN.md
• PROGRESS.md

Explicit Non-Goals

• Do not implement nonlinear, dynamic, pressure, or thermal behavior.
• Do not add multiple-step execution unless already trivial and tested.
• Do not make HDF5 dependency mandatory if the current minimal writer remains the accepted Phase 1 path.

Tests To Write First

• Input-to-analysis-model activation test.
• End-to-end small linear static solve with U and RF.
• Result schema field label and frame tests.
• Full-vector reaction balance test.
• Missing/unsupported input negative tests routed through the workflow.

Reference Artifacts

• Normalized small .inp fixtures may be used.
• Stored Abaqus CSV regression is reserved for step 14.

Acceptance Commands

python scripts/validate_workspace.py

Evaluator Checklist

• Workflow follows architecture boundaries.
• AnalysisState owns mutable vectors.
• Results use documented step/frame/field structure.

Handoff Requirements

• Record end-to-end workflow readiness in PROGRESS.md.

Do Not

• Do not bypass validators to make a model solve.