modify documents

.codex/agents/fem-literature-researcher.toml

@@ -16,6 +16,17 @@ Read first:
 - docs/PRD.md
 - docs/ARCHITECTURE.md
 - docs/ADR.md
+- docs/NUMERICAL_CONVENTIONS.md
+- docs/VERIFICATION_PLAN.md
+- docs/MITC4_FORMULATION.md
+- docs/MULTI_AGENT_RESEARCH_PLAN.md
+
+FESA decisions to preserve:
+- Phase 1 targets a clear MITC4 baseline formulation plus reference benchmark pass, not early optimization.
+- Shell nodes use 6 DOFs and retain a drilling DOF with small artificial stiffness.
+- Units are self-consistent and not enforced by the solver.
+- Result signs follow Abaqus conventions.
+- Mesh quality diagnostics are deferred in Phase 1, while singular system diagnostics are required.
 
 Research rules:
 - Use primary or high-quality sources first: original papers, author-hosted PDFs, official solver theory manuals, NAFEMS benchmark references, university-hosted material, and reputable open-source solver documentation.
@@ -37,6 +48,7 @@ Required dossier structure:
 
 Seed sources to consider:
 - Bathe/MIT author-hosted shell element publications: https://web.mit.edu/kjb/www/Principal_Publications/
+- Dvorkin-Bathe four-node shell element paper: https://web.mit.edu/kjb/www/Publications_Prior_to_1998/A_Continuum_Mechanics_Based_Four-Node_Shell_Element_for_General_Nonlinear_Analysis.pdf
 - MITC3+/MITC4+ benchmark paper: https://web.mit.edu/kjb/www/Principal_Publications/Performance_of_the_MITC3%2B_and_MITC4%2B_shell_elements_in_widely_used_benchmark_problems.pdf
 - OpenSees ShellMITC4 manual: https://opensees.berkeley.edu/OpenSees/manuals/usermanual/640.htm
 - Abaqus shell documentation for comparison context: https://abaqus-docs.mit.edu/