FESADev/docs/releases/linear-static-3d-euler-beam-release.md

Linear Static 3D Euler Beam Release Report

Metadata

• feature_id: linear-static-3d-euler-beam
• approved_design: docs/superpowers/specs/2026-08-08-linear-static-3d-euler-beam-design.md (status: approved; approved 2026-08-08, amended 2026-08-09)
• source_requirement: docs/requirements/linear-static-3d-euler-beam.md
• source_research: docs/research/linear-static-3d-euler-beam-research.md
• source_formulation: docs/formulations/3d-isoparametric-euler-beam-formulation.md
• source_numerical_review: docs/numerical-reviews/linear-static-3d-euler-beam-review.md
• source_io_definition: docs/io-definitions/linear-static-3d-euler-beam-io.md
• source_reference_model: docs/reference-models/linear-static-3d-euler-beam-reference-models.md
• source_implementation_plan: docs/implementation-plans/linear-static-3d-euler-beam.md
• source_implementation_report: docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md
• source_build_test_report: docs/build-test-reports/linear-static-3d-euler-beam.md
• source_reference_verification_report: docs/reference-verifications/linear-static-3d-euler-beam-reference-verification.md
• source_physics_evaluation_report: docs/physics-evaluations/linear-static-3d-euler-beam-physics-evaluation.md
• audited_head: 822b06be3d2128d5dfdc5e394078abbb9dcd5a50
• reference_model_id: cantilever-beam-b33
• reference_schema: abaqus-cae-report-csv-v0
• reference_baseline: reference/cantilever beam/ at source commit 2b34d0b
• status: ready-for-release
• owner_agent: release-agent
• date: 2026-08-10
• final_review_source_head: b7a1258ce0f36a85b888e23470cf9d936a7595cd

This is an internal feature-readiness verdict. It authorizes no publish, deploy, package, tag, push, external release, or reference-artifact operation.

Release Scope

item	included	excluded	notes
analysis	one small-displacement/small-rotation *STEP, *STATIC linear solve	multiple steps; geometric/material nonlinearity; dynamics; contact; thermal	Stiffness/partition and Kff factorization precede load assembly, effective RHS, and substitution.
element	straight, prismatic, two-node 3D Euler-Bernoulli beam mapped only from TYPE=B33	TYPE=B31, shear-deformable/Timoshenko, curved/tapered/released/offset/warping members	Axial, two-plane bending, and Saint-Venant torsion are included.
material/section	homogeneous isotropic linear elasticity; positive E,G,A,Iy,Iz,J; I12=0	I12!=0, anisotropy, plasticity, temperature dependence, warping data	Mapping is n1 -> local y, t x n1 -> local z, Iy=I11, Iz=I22.
Abaqus input subset	approved keyword inventory, identity part/assembly/instance wrappers, *BOUNDARY, nodal *CLOAD	full compatibility, instance transforms, nested assembly, dependent/independent mesh semantics, *DLOAD	Approved output-request allowlist is warning no-op and cannot filter FESA output.
solver/storage	deterministic COO-to-0-based-CSR, oneTBB element-local work, oneMKL PARDISO SPD factorization/substitution	alternate solver claims, automatic regularization, unsupported conditioning policy	Backend types remain behind adapters.
authoritative output	HDF5 results.h5: displacement, reaction, equilibrium end action, section/generalized results, axial S11, metadata, diagnostics	official FESA CSV output; transverse/torsional shear stress; warping stress; nodal stress averaging	Beam stress reference comparison is N/A; S11 remains mandatory and is analytically/schema tested.
reference comparison	exact read-only legacy B33 four-file bundle; displacement, reaction, section resultant	Abaqus stress CSV; broad B33 compatibility; reference solver execution	176/176 rows and 16/16 metrics passed the approved mixed tolerance.

Gate Evidence Inventory

gate	source	expected status	observed status/evidence	verdict
approved design	approved design	approved	approved; same feature and legacy baseline	pass
requirements	requirements baseline	approved	approved; 44 consecutive must rows	pass
research	research brief	ready-for-formulation	ready-for-formulation; applicability limits retained	pass
formulation	formulation document	ready-for-numerical-review	ready-for-numerical-review; exact requirement/design links	pass
numerical review	numerical review	pass-for-implementation-planning	pass-for-implementation-planning; no confirmed mathematical defect	pass
I/O definition	I/O contract	ready-for-implementation-planning	ready-for-implementation-planning	pass
reference model	reference-model contract	ready-for-implementation-planning	legacy inventory/provenance and analytical portfolio defined	pass
implementation plan	implementation plan	ready-for-implementation	ready-for-implementation; TASK-07 through TASK-24 defined	pass
implementation evidence	implementation report plus phase index	all Step 7-24 blocks completed	18/18 Step blocks and index entries completed; final cumulative suite 83 tests	pass with stale-header note below
build/test	build/test report	pass-for-reference-verification	pass-for-reference-verification; fresh MSVC x64 Debug build, warning count 0, 83/83	pass
reference verification	reference-verification report	pass-for-physics-evaluation	pass-for-physics-evaluation; 176/176 rows and 16/16 metrics	pass
physics evaluation	physics-evaluation report	pass-for-release-agent	pass-for-release-agent; all documented physics checks and 17/17 targeted tests pass	pass
phase sequence	phase index	Steps 0-27 completed	28/28 prerequisite entries completed in gate order	pass

Identity and contradiction audit

• All feature-level reports use linear-static-3d-euler-beam, the same approved design path, authoritative HDF5 contract, logical model cantilever-beam-b33, legacy schema, and exact reference/cantilever beam/ baseline from 2b34d0b.
• The formulation metadata uses the narrower element-document identity 3d-isoparametric-euler-beam. This is not a competing release feature: it names the exact formulation path referenced by the approved feature requirements, design, numerical review, I/O contract, reference-model contract, and implementation plan. Its source_requirement and approved_design links establish the same release lineage.
• The implementation report aggregate metadata still says status: in-progress. This is a stale aggregate header, not an unresolved release gate: every TASK-07 through TASK-24 block is completed, all corresponding phase-index entries are completed, Step 25 independently audited all 18 blocks, and a fresh build/discovery/full CTest passed 83/83. The Step 25 report reaches the same explicit nonblocking conclusion. The upstream implementation report was not modified.
• Final review reproduced that the former Step 26 sample acceptance probe rejected a valid passed=true artifact because it read a nonexistent string status. The phase probe now reads the authoritative boolean passed; its exact command was rerun successfully without changing source, tests, tolerance, or reference artifacts.
• The Step 25 prose contains a typo in the input SHA-256. Fresh Step 26/27 hashes, Git diff/status, exact row reconstruction, and passing comparison evidence preserve artifact identity.

Acceptance Traceability

Evidence aliases used below are exact upstream identities: BT25 is the build/test report; RV26 is the reference-verification report; PE27 is the physics-evaluation report. Model IDs (an-*, cv-*, neg-b33-input-contract, cantilever-beam-b33) and NR-T01 through NR-T11 are defined by the approved reference-model and numerical-review documents. Every row has priority must in the approved Requirement Verification Matrix.

requirement	acceptance criterion	exact test/evidence IDs	reference or analytical evidence	final disposition
FESA-REQ-LS3DEB-001	One static step runs; a second step is rejected structurally.	T12-MAP-001, T12-MAP-004, T13-MODEL-003, T24-CLI-001	smoke-b33-cli; neg-b33-input-contract; BT25	released-in-V0
FESA-REQ-LS3DEB-002	Accepted models obey the straight/prismatic/two-node, small linear-static scope and exclusions are not claimed.	T12-MAP-001, T12-MAP-004, T16-BEAM-006, T24-ORCH-002	CB-AXIAL-TIP, CB-TORSION-TIP, both bending candidates; PE27 model coverage	released-in-V0
FESA-REQ-LS3DEB-003	DOF and nodal-result order is exactly [UX,UY,UZ,URX,URY,URZ].	T14-DOF-001, T15-STATE-002, T23-HDF5-001	cantilever-beam-b33; RV26 HDF5 audit	released-in-V0
FESA-REQ-LS3DEB-004	Axial, torsion, local-y bending, and local-z bending recover approved analytical quantities.	T16-BEAM-006, T22-RECOVERY-004, NR-T08-ANALYTICAL	an-b33-axial-cantilever, an-b33-torsion-cantilever, an-b33-local-y-bending, an-b33-local-z-bending; PE27	released-in-V0
FESA-REQ-LS3DEB-005	Only B33 creates the approved Euler beam semantic object.	T12-MAP-001, T24-B33-001	cantilever-beam-b33; RV26 confirms TYPE=B33	released-in-V0
FESA-REQ-LS3DEB-006	B31 returns exact unsupported-element-formulation and creates no Euler beam.	T12-MAP-004	CB-B31-NEGATIVE; neg-b33-input-contract	released rejection behavior; B31 unsupported
FESA-REQ-LS3DEB-007	DOFs 1..6 map correctly and nonzero dc affects RHS and reaction.	T14-DOF-002, T19-CONSTRAINT-003, T21-LOAD-001, T21-LOAD-003, T22-RECOVERY-001	an-b33-prescribed-displacement; NR-T09-PARTITION-SPD; PE27	released-in-V0
FESA-REQ-LS3DEB-008	Closed-form line-load vector passes while parser/CLI *DLOAD and Domain distributed load remain absent.	T16-BEAM-005, T12-MAP-005, NR-T06-LINE-LOAD	an-b33-line-load-kernel; PE27 targeted portfolio	released kernel; *DLOAD unsupported
FESA-REQ-LS3DEB-009	Every approved keyword has positive coverage and no unlisted support claim exists.	T12-MAP-001, T12-MAP-004	smoke-b33-cli; exact I/O keyword inventory; legacy input	released approved subset only
FESA-REQ-LS3DEB-010	Case variants/comments behave correctly and raw source identity survives.	T11-SYN-001, T11-SYN-002, T10-DOM-001	legacy input exact-byte identity fnv1a64:04543464cc970405; RV26	released-in-V0
FESA-REQ-LS3DEB-011	Only approved boundary/load arities and DOFs pass; target expansion is deterministic.	T12-MAP-001, T12-MAP-002, T12-MAP-004, T14-DOF-002, T21-LOAD-001	analytical load/BC fixtures; invalid-target portfolio	released-in-V0
FESA-REQ-LS3DEB-012	Section properties and right-handed local-axis mapping match the contract.	T12-MAP-001, T12-MAP-004, T16-BEAM-004, NR-T05-TRANSFORM	both bending models; an-b33-rotated-space; PE27 local/global signs	released-in-V0
FESA-REQ-LS3DEB-013	Valid E,nu/derived G and positive section properties pass; malformed/nonpositive data fails.	T12-MAP-001, T12-MAP-004, T16-BEAM-007	analytical inventory; neg-b33-input-contract invalid properties	released-in-V0
FESA-REQ-LS3DEB-014	Exact scale-aware length/guide thresholds reject boundary failures and valid geometry gives an orthonormal frame.	T12-MAP-004, T16-BEAM-004, T16-BEAM-007, NR-T05-TRANSFORM	neg-b33-input-contract; rotated-space analytical model	released-in-V0
FESA-REQ-LS3DEB-015	Instance/source labels round-trip to stable unique internal IDs.	T10-DOM-001, T10-DOM-002, T12-MAP-002, T23-HDF5-001	multi-instance semantic fixture; RV26 model identity audit	released-in-V0
FESA-REQ-LS3DEB-016	Multiple identity instances remain distinct and deterministic.	T10-DOM-003, T12-MAP-002	multi-instance semantic fixture; reference CSV N/A	released-in-V0
FESA-REQ-LS3DEB-017	Instance translation/rotation fails with exact unsupported-instance-transform.	T12-MAP-004	neg-b33-input-contract transform case	released rejection behavior; transforms unsupported
FESA-REQ-LS3DEB-018	Nested/dependent constructs fail structurally and produce no Domain model.	T12-MAP-004	neg-b33-input-contract nested/dependent cases	released rejection behavior; nested assembly unsupported
FESA-REQ-LS3DEB-019	Exact no-op allowlist emits deterministic warnings without semantic effect.	T12-MAP-003, T23-HDF5-002, T23-HDF5-003	legacy input/output requests; RV26 mandatory-output audit	released-in-V0
FESA-REQ-LS3DEB-020	Unlisted model keywords fail and allowed output requests cannot suppress mandatory HDF5 output.	T12-MAP-004, T23-HDF5-002, T24-CLI-003	smoke-b33-cli; RV26 exact HDF5 inventory	released-in-V0
FESA-REQ-LS3DEB-021	Active-step view neither copies nor mutates Domain.	T10-DOM-002, T13-MODEL-002	architecture/code-verification fixture; reference CSV N/A	released-in-V0
FESA-REQ-LS3DEB-022	DofManager exclusively owns mapping/scatter/reconstruction; Node/Element have no equation IDs.	T14-DOF-001, T14-DOF-003, T14-DOF-004, T19-CONSTRAINT-001	code/dependency audit; reference CSV N/A	released-in-V0
FESA-REQ-LS3DEB-023	Required V0 state is connected to output and excluded state is unallocated.	T15-STATE-001, T15-STATE-002, T23-HDF5-001	smoke-b33-cli; RV26 HDF5 audit	released-in-V0
FESA-REQ-LS3DEB-024	Repeated/thread-varied assembly has identical CSR order and values.	T17-PFOR-002, T18-SPARSE-002, T18-SPARSE-004, T18-SPARSE-005, NR-T11-DETERMINISTIC-ASSEMBLY	cv-b33-patch-rigid-assembly; reference CSV N/A	released-in-V0
FESA-REQ-LS3DEB-025	Backend types do not leak and dense/sparse storage matches contract.	T07-BUILD-002, T09-DENSE-001, T09-DENSE-002, T18-SPARSE-001, T20-PARDISO-004; Step 25 dependency scans	adapter/code audit; BT25	released-in-V0
FESA-REQ-LS3DEB-026	Event trace is stiffness/partition/factorize/load/RHS/solve with separate factorization.	T20-PARDISO-002, T24-ORCH-001	lifecycle event-trace fixture; BT25	released-in-V0
FESA-REQ-LS3DEB-027	Effective RHS, full displacement, and residual reaction satisfy partition equations.	T19-CONSTRAINT-001, T19-CONSTRAINT-003, T21-LOAD-003, T22-RECOVERY-001, T22-RECOVERY-002, NR-T09-PARTITION-SPD	an-b33-prescribed-displacement; PE27 residual/reaction checks	released-in-V0
FESA-REQ-LS3DEB-028	Success atomically produces final HDF5 and failure leaves no incomplete final file.	T23-HDF5-004, T23-HDF5-005, T24-CLI-001	CLI writer success/failure fixtures; RV26 authoritative output	released-in-V0
FESA-REQ-LS3DEB-029	Every schema-v0 path exists at frame 0 with exact rank/component identity.	T23-HDF5-001, T24-B33-001	RV26 read-only HDF5 schema audit	released-in-V0
FESA-REQ-LS3DEB-030	Metadata fields, ordinary unit label, and external SI provenance are exact.	T07-BUILD-001, T23-HDF5-001, T24-CLI-001, T24-B33-001	cantilever-beam-b33; RV26 metadata/source-identity audit	released-in-V0
FESA-REQ-LS3DEB-031	Component order and endpoint/Gauss locations are exact and output-request independent.	T15-STATE-002, T16-BEAM-006, T22-RECOVERY-003, T23-HDF5-001, T23-HDF5-002, T24-CLI-003	all analytical models; RV26; PE27 end/section checks	released-in-V0
FESA-REQ-LS3DEB-032	Correct S11 rows/default centroid exist, no shear stress is emitted, and stress reference is N/A.	T16-BEAM-008, T22-RECOVERY-005, T23-HDF5-003, T24-B33-001	axial/local-z analytical stress; RV26 Stress Reference Status; PE27 stress sanity	released; Abaqus stress reference N/A
FESA-REQ-LS3DEB-033	Default/explicit output and exact exit-code/ordered-diagnostic contract pass.	T08-CORE-002, T24-CLI-001, T24-CLI-002	CLI negative portfolio; BT25	released-in-V0
FESA-REQ-LS3DEB-034	Every production step has RED, GREEN, focused/full VERIFY, discovery, and no warning.	T07-* through T24-*; TASK-07 through TASK-24 report blocks	BT25: 18/18 blocks audited, fresh warning count 0, 83 discovered, 83/83 pass	satisfied
FESA-REQ-LS3DEB-035	All matrix, mode, residual, transform, partition, and analytical thresholds pass.	T16-BEAM-001 through T16-BEAM-010; T18-SPARSE-004; T19-CONSTRAINT-003; T20-PARDISO-001, T20-PARDISO-006; T22-RECOVERY-002; NR-T01 through NR-T11	analytical portfolio; PE27 exact targeted 17/17	satisfied
FESA-REQ-LS3DEB-036	Abaqus-only component scale and exact mixed formula apply to every row.	T24-REF-002, T24-B33-001	RV26: 176 recalculated row decisions, 16 metrics	satisfied
FESA-REQ-LS3DEB-037	Exact SI floors and zero-scale behavior are applied.	T24-REF-002, T24-B33-001	RV26 component table includes zero-scale groups and exact floors	satisfied
FESA-REQ-LS3DEB-038	Invalid row/schema/identity/nonfinite cases fail before tolerance; no clamp/drop occurs.	T24-REF-001, T24-REF-002	malformed contract fixtures; RV26 zero missing/extra/duplicate/nonfinite rows	satisfied
FESA-REQ-LS3DEB-039	Every row decision and aggregate/worst metric is present.	T24-REF-003, T24-B33-001	RV26: 176 ledger rows, 16 component metrics, exact recomputation	satisfied
FESA-REQ-LS3DEB-040	Exact legacy filenames exist and reference content is unchanged.	T11-SYN-004, T24-B33-001; BT25/RV26/PE27 reference diff/status checks	exact approved four-file bundle and pre/post hashes	satisfied legacy exception
FESA-REQ-LS3DEB-041	Four-file/B33/header/key/finite precheck passes before comparison with approved failure classes.	T24-REF-001, T24-B33-001	RV26 Artifact Inventory: 4 files, 11/11/11 rows, finite/unique	satisfied
FESA-REQ-LS3DEB-042	Exact component/source identity and endpoint-consistency/no-average policy pass.	T22-RECOVERY-006, T24-REF-004, T24-B33-001	RV26: displacement 66, reaction 66, section 44; endpoint consistency true	satisfied
FESA-REQ-LS3DEB-043	Build precedes reference, reference precedes physics, and physics covers required checks.	BT25, RV26, PE27; phase Steps 25-27	PE27: force/moment equilibrium, reaction, displacement, symmetry, section/end force, residual and coverage pass	satisfied
FESA-REQ-LS3DEB-044	No reference solver/artifact mutation occurs and release claims no excluded support.	T12-MAP-004, T12-MAP-005; BT25/RV26/PE27 no-change assertions; Step 28 Git audit	exact legacy diff/status clean; this report's Release Scope and Known Limitations	satisfied

Audit result: all 44 expected must requirements have an acceptance criterion, exact executable or gate evidence, reference/analytical evidence or an explicit applicable N/A, and a final disposition. No must requirement is deferred or blocked.

Validation Evidence

command or report	expected	observed	result
Step 25 fresh MSVC x64 Debug configure/build	exit 0; /W4 /WX; no warnings	exit 0; warning scan 0	pass
Step 25 CTest discovery/full	nonzero discovery; zero failures	83 discovered; feature 83/83; full 83/83	pass
exact Build/Test gate string	status: pass-for-reference-verification	present	pass
exact Reference Verification gate string and result probe	status: pass-for-physics-evaluation; passed=true	present; corrected exact acceptance command and comparison test pass	pass
exact Physics Evaluation gate string	status: pass-for-release-agent	present; targeted physics selection 17/17	pass
reference comparison	exact rows/metrics; approved tolerance	176/176 rows, 16/16 metrics, passed=true; largest normalized error 0.026602795021994977 < 1	pass
physics sanity	equilibrium/sign/symmetry/section/residual/coverage pass	force 1.1921e-13, moment 2.7418e-13, free residual 9.3563e-13; all checks pass	pass
phase prerequisites	Steps 0-27 completed	all 28 prerequisite entries completed	pass

Release Checklist

• Approved design, requirements, research, formulation, numerical, I/O, and reference-model evidence is present.
• TASK-07 through TASK-24 implementation evidence is complete and independently audited.
• Exact three-gate status strings are present and passing.
• All 44 must requirements are traced to acceptance, exact evidence, reference/analytical coverage, and disposition.
• Reference bundle identity and read-only status are preserved.
• Known limitations, accepted Minors, evidence limitations, and explicit N/A items are documented.
• No Critical, unresolved Important, defect, missing artifact, failed command, or user decision blocks internal readiness.

Known Limitations

limitation	category	user impact	disposition
Abaqus TYPE=B31 / Timoshenko	element/input	rejected as unsupported-element-formulation; no shear-deformable beam behavior	documented, deferred feature
multiple analysis steps	analysis/input	a second *STEP is rejected; no step-to-step propagation	documented, deferred feature
instance transforms and nested/dependent assembly	model/input	translation/rotation and nested semantics are rejected	documented, deferred feature
I12!=0 and section extensions	section/physics	coupled inertia, taper, offsets, releases, curved geometry, and warping are unsupported	documented, deferred feature
Abaqus *DLOAD	load/input	parser/CLI reject it; only the formulation-level constant local line-load kernel exists	documented, deferred feature
nonlinear/dynamic/contact/thermal	analysis/physics	no geometric/material nonlinearity, dynamics, contact, or thermal response	documented, deferred feature
shear and warping stress	output/physics	no transverse/torsional shear-stress or warping-stress recovery; no nodal averaging	documented, deferred feature
beam stress reference	verification	axial S11 is mandatory and analytically/schema tested, but Abaqus stress reference is N/A	accepted contract N/A
approved four-file legacy exception	artifacts	spaces and legacy names remain; metadata.json is absent-allowed by project-wide policy, while README.md and stress CSV are N/A only for this bundle	read-only accepted filename/README exception; not precedent for new bundles
reference coverage	verification	single identity-axis local-z B33 cantilever does not itself cover axial/torsion/local-y/rotated/prescribed/line-load/nonzero-fiber stress	accepted; complementary analytical/unit portfolio passes
Euler-Bernoulli applicability	modeling	deep/short beams may be too stiff; no automatic slenderness threshold is approved	documented modeling limit
energy evidence	output	no HDF5 energy dataset; Step 27 derives positive 0.5*F^T*d and uses rank/energy tests	accepted evidence limit
comparator file-type depth (Minor)	test evidence	test-only comparator pins float64 types but relies on writer self-check/full schema tests for exact uint64/compound/string file types	accepted defense-in-depth coverage limit
multi-source diagnostic order (Minor)	portability/future scope	sorter is sufficient for V0 single-input CLI but is not the future multi-source declaration/internal-ID ordering contract	accepted V0 limit
HDF5 libmmd.dll staging guard (Minor)	environment portability	unconditional guard is correct for approved shared-HDF5 environment; alternate HDF5 targets may need adjustment	accepted external portability limit
stale implementation aggregate header	documentation	top-level in-progress can confuse readers despite completed evidence	documented nonblocking stale header; upstream unchanged

Release Notes Draft

Feature Summary

• Adds the internally release-ready FESA V0 end-to-end single-step linear-static 3D Euler-Bernoulli beam pipeline for Abaqus TYPE=B33 input.
• Supports stable identity instances, deterministic DOF/sparse assembly, separate PARDISO factorization/substitution, nonzero prescribed displacement, residual reactions, and atomic HDF5 results.h5 output.
• Writes mandatory displacement, reaction, equilibrium end action, endpoint section resultant, generalized strain/resultant, and axial S11 regardless of Abaqus output requests.

Verification Scope

• Fresh Visual Studio 18 2026/MSVC x64 Debug build passed under /W4 /WX with zero warnings and all 83 discovered tests passing.
• The approved read-only cantilever-beam-b33 bundle passed all 176 displacement/reaction/section rows and all 16 metric groups under absolute_floor + 1e-6 * reference_scale.
• Physics evaluation passed force/moment equilibrium, reactions, displacement/rotation signs, zero symmetry, end/section balance, local/global mapping, residual, S11, energy/modes, and complementary analytical coverage.

Main Limitations

• No B31, multiple steps, transforms/nested assembly, I12!=0, *DLOAD, nonlinear, dynamic, contact, thermal, shear-stress, or warping-stress support.
• Abaqus beam stress reference comparison is N/A; nonzero S11 evidence is analytical/unit-based.
• The legacy space-containing four-file reference bundle is a read-only exception. New bundles must use canonical names and metadata.
• The single Abaqus cantilever is supplemented by analytical/unit models and does not establish full Abaqus B33 compatibility or experimental validation.
• Accepted Minor test-depth and alternate-environment portability limits remain as documented in Known Limitations.

Artifacts

• Authoritative solver output for a run: HDF5 results.h5.
• Approved reference baseline: reference/cantilever beam/ exact four-file legacy bundle.
• Gate evidence: the Build/Test, Reference Verification, and Physics Evaluation reports listed in Metadata; deterministic build-local comparison.json is review evidence, not solver output.

Release Verdict

• verdict: ready-for-release
• status: ready-for-release
• reason: all required upstream gates are present and passing, Steps 0-27 are completed, all 44 must requirements have complete acceptance/test/reference/disposition traceability, reference identity is unchanged, known limitations and accepted risks are documented, and no unresolved blocker exists.
• authority_boundary: internal feature readiness only; no publish, deploy, package, tag, push, external release, or reference-artifact change is authorized. Harness-owned phase evidence commits remain part of the internal development workflow, not release publication.

Handoff Recommendation

target_agent	reason	required input
Coordinator Agent	Close the internal feature workflow with ready-for-release.	This report, exact three-gate reports, phase index Step 28 completion, and the documented authority boundary.
Correction Agent	N/A; no implementation-owned blocker exists.	N/A
Reference Verification Agent	N/A; required comparison passed.	N/A
Physics Evaluation Agent	N/A; required physics review passed.	N/A

No release engineering, packaging, publication, tag, push, or external coordination was performed. Harness/root phase-evidence commits are internal workflow records, not an external release action.

No-Change Assertion

• source_files_modified: false
• test_files_modified: false
• cmake_files_modified: false
• requirements_or_upstream_contracts_modified: false
• implementation_report_modified: false
• build_report_modified: false
• reference_verification_report_modified_for_review_fix: true
• physics_report_modified: false
• reference_artifacts_modified: false
• tolerance_policies_modified: false
• Abaqus_or_other_reference_solver_executed: false
• release_agent_publish_deploy_package_tag_push_commit_performed: false
• harness_or_root_phase_evidence_commits_performed: true
• owned_release_report_created: true
• phase_index_step28_modified: true
• phase_step26_acceptance_modified_for_review_fix: true
• phase_index_step26_summary_modified_for_review_fix: true
• notes: The release audit initially created this report and changed only Step 28. Final review then aligned the Step 26 acceptance probe/report/index summary with authoritative passed=true; source, tests, tolerance, reference artifacts, and physical evidence remain unchanged.

Open Issues

• Blocking issues: none.
• Nonblocking documentation issue: the implementation report aggregate status: in-progress is stale; completed Step blocks, phase index, and Step 25 fresh audit are authoritative for release closure. It remains unchanged to preserve upstream audit independence.
• Resolved final-review finding: Step 26 now probes authoritative passed=true, and the exact acceptance command passes. The remaining Step 25 input-hash prose typo is nonblocking; later exact hashes and Git audits resolve identity without changing artifacts.
• Nonblocking accepted Minors: comparator file-type defense-in-depth coverage, future multi-source diagnostic ordering, and alternate-HDF5 libmmd.dll staging portability remain as documented.
• Deferred behavior is limited to the Known Limitations and is not claimed as supported.