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FESADev/.codex/skills/fesa-requirements-baseline/SKILL.md
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---
name: fesa-requirements-baseline
description: Use when defining FESA solver feature requirements, acceptance criteria, tolerance decisions, verification quantities, and a requirement verification matrix before research, formulation, reference modeling, or implementation planning.
---
# FESA Requirements Baseline
Use this skill to turn a solver feature request into a verifiable baseline that downstream agents can use without guessing.
## Inputs
Read these first:
- `AGENTS.md`
- `docs/SOLVER_AGENT_DESIGN.md`
- User feature request, target capability, constraints, and known exclusions
- Existing `docs/<feature-id>/requirements.md` when revising a feature
## Workflow
1. Assign a stable `feature_id` in kebab case.
2. Define purpose, included scope, excluded scope, and analysis definition.
3. Convert requested behavior into `shall` statements with ids like `FESA-REQ-<FEATURE>-###`.
4. Define verification quantities: displacement, reaction, element force, stress, strain, energy, or residual.
5. Record Tolerance Policy values or mark them `needs-user-decision`.
6. Record a minimal Reference Case: exact existing input/required CSV paths, blocking and
warning-only quantities, HDF5 projection, source-ID/component matching, and tolerance.
7. Build a Requirement Verification Matrix that maps requirement, source, verification method, acceptance criteria, tolerance, downstream agents, and status.
8. Keep unresolved decisions visible as open issues; do not hide gaps behind vague wording.
## Output Contract
Produce or revise `docs/<feature-id>/requirements.md` with:
- Metadata with `feature_id`, status, owner agent, and date
- Purpose, In Scope, Out Of Scope, and Analysis Definition
- Input and Output Requirements
- Verification Quantities
- Tolerance Policy
- Reference Case Requirements
- Requirement Verification Matrix
- Open Questions and Downstream Handoff
## Boundaries
- Do not implement C++ code.
- Do not write finite element formulations.
- Do not design C++ APIs or file ownership.
- Do not run Abaqus, Nastran, or any reference solver.
- Do not generate or modify Abaqus reference CSV files.
- Do not approve release readiness.
## Quality Gate
- Every `must` requirement has a verification method and acceptance criteria.
- Every numerical solver-output requirement has units, coordinates, and tolerance when applicable.
- Every reference-comparison requirement names exact required files, compared components,
source identity, blocking/warning behavior, and tolerance.
- Do not require canonical names, README, metadata, provenance, or CSVs for quantities outside
the feature acceptance boundary.
- Words like "accurate", "fast", and "Abaqus-like" are converted into measurable criteria or open questions.
- Return reference artifact, comparison quantity, source-identity/component, and tolerance gaps for Numerical Review rather than inventing acceptance rules.
## Handoff
Return `docs/<feature-id>/requirements.md`, status, evidence summary, and blockers to Coordinator Agent. Route theory questions to Research Agent and reference acceptance, artifact, identity/component, and tolerance questions to Numerical Review Agent through Coordinator Agent.