test: strengthen core harness guardrails

PLAN.md

@@ -13,7 +13,7 @@ Every new agent session must read this file together with `PROGRESS.md` before p
 - If an item becomes obsolete, move it to `PROGRESS.md` with a short reason instead of silently deleting it.
 
 ## Current Objective
-Continue the new Phase 1 rebaseline plan in `phases/1-linear-static-mitc4-rebaseline`, starting with P1R-02 core harness guardrails. The old `phases/1-linear-static-mitc4` path is historical and superseded by the paper-based MITC4 formulation reset.
+Continue the new Phase 1 rebaseline plan in `phases/1-linear-static-mitc4-rebaseline`, starting with P1R-03 parser/domain subset revalidation. The old `phases/1-linear-static-mitc4` path is historical and superseded by the paper-based MITC4 formulation reset.
 
 ## Required Reading For New Agents
 1. `AGENTS.md`
@@ -36,7 +36,7 @@ Continue the new Phase 1 rebaseline plan in `phases/1-linear-static-mitc4-rebase
 ## Active Phase Files
 - Active phase directory: `phases/1-linear-static-mitc4-rebaseline`
 - Execute with: `python scripts/execute.py 1-linear-static-mitc4-rebaseline`
-- Step numbering is zero-based. `step0.md` is complete and recorded in `phases/1-linear-static-mitc4-rebaseline/step0-audit.md`; `step1.md` is complete and created the `quad_02_phase1.inp` normalized reference path; `step15.md` is the independent evaluator closeout.
+- Step numbering is zero-based. `step0.md` is complete and recorded in `phases/1-linear-static-mitc4-rebaseline/step0-audit.md`; `step1.md` is complete and created the `quad_02_phase1.inp` normalized reference path; `step2.md` is complete and revalidated core harness guardrails; `step15.md` is the independent evaluator closeout.
 - Every step file contains a sprint contract with objective, required reading, scope, allowed files, explicit non-goals, tests to write first, reference artifacts, acceptance command, evaluator checklist, and handoff requirements.
 - Historical phase directory: `phases/1-linear-static-mitc4`
 - Historical phase status: blocked/superseded. Do not resume the old P1-15/P1-16 path unless the user explicitly requests recovery of that exact phase.
@@ -75,7 +75,7 @@ Each gate should be satisfied before moving to the next implementation band unle
 | G0 - Planning readiness | partial | Readiness task R-011 is resolved by `quad_02_phase1.inp`; R-010 and R-013 remain open. | Updated docs, PLAN.md, PROGRESS.md |
 | G1 - Build and validation | satisfied | Build system, test framework, and `scripts/validate_workspace.py` run real checks. | Validation command output |
 | G2 - Parser and domain | pending rebaseline | Must be revalidated through steps 3 and 4 against the current parser subset and stored-reference compatibility policy. | Future parser and validation tests |
-| G3 - DOF/math/results infrastructure | pending rebaseline | Must be revalidated through steps 2, 5, 6, and 12. | Future unit and integration tests |
+| G3 - DOF/math/results infrastructure | partial | Core aliases, DOF mapping, validation harness, and model diagnostic context were revalidated in step 2; DofManager/results/assembly remain for steps 5, 6, and 12. | P1R-02 validation output |
 | G4 - MITC4 element readiness | reopened | MITC4 formulation was rewritten from local papers; element implementation must be rebuilt or revalidated through steps 7 through 11. | Revised `docs/MITC4_FORMULATION.md`, future element tests |
 | G5 - End-to-end solver | reopened | Linear static path must be revalidated through steps 13 and 14 after the MITC4 rebuild and `quad_02` compatibility path. | Future integration/reference regression output |
 
@@ -84,12 +84,11 @@ All milestones are intended to become one or more self-contained sprint contract
 
 | ID | Status | Owner | Objective | Depends On | Acceptance Focus |
 |---|---|---|---|---|---|
-| P1R-02 | pending | core generator | Revalidate build/test harness, core aliases, DOF enum, and diagnostics. | P1R-00 | Validation command and core tests |
-| P1R-03 | pending | parser generator | Revalidate Phase 1 parser and immutable Domain subset. | P1R-02 | Supported keywords accepted; unsupported features rejected |
+| P1R-03 | pending | parser generator | Revalidate Phase 1 parser and immutable Domain subset. | none | Supported keywords accepted; unsupported features rejected |
 | P1R-04 | pending | validation generator | Rebuild validation and singular diagnostic coverage. | P1R-03 | Missing-reference and singular-prone negative tests |
-| P1R-05 | pending | DOF generator | Rebuild six-DOF DofManager, constrained/free mapping, equation numbering, and full-vector reconstruction. | P1R-02 | DOF mapping and reaction foundation tests |
-| P1R-06 | pending | results generator | Rebuild minimum results model and displacement CSV comparator. | P1R-02 | U/RF schema tests and CSV comparator tests |
-| P1R-07 | pending | MITC4 generator | Implement MITC4 geometry, node order, tying points, directors, and local bases. | P1R-02 | Shape/basis/diagnostic tests |
+| P1R-05 | pending | DOF generator | Rebuild six-DOF DofManager, constrained/free mapping, equation numbering, and full-vector reconstruction. | none | DOF mapping and reaction foundation tests |
+| P1R-06 | pending | results generator | Rebuild minimum results model and displacement CSV comparator. | none | U/RF schema tests and CSV comparator tests |
+| P1R-07 | pending | MITC4 generator | Implement MITC4 geometry, node order, tying points, directors, and local bases. | none | Shape/basis/diagnostic tests |
 | P1R-08 | pending | MITC4 generator | Implement degenerated-continuum displacement, covariant strain rows, and MITC shear tying. | P1R-07 | Finite-difference and tying interpolation tests |
 | P1R-09 | pending | MITC4 generator | Implement material matrix, transform, and `2 x 2 x 2` integration scaffolding. | P1R-08 | Material/integration tests |
 | P1R-10 | pending | MITC4 generator | Assemble MITC4 stiffness/internal force with six-DOF transform and drilling stabilization. | P1R-09, P1R-05 | Symmetry, rigid body, drilling sensitivity tests |