diff --git a/docs/build-test-reports/euler-beam-3d-build-test.md b/docs/build-test-reports/euler-beam-3d-build-test.md
new file mode 100644
index 0000000..80b6e8b
--- /dev/null
+++ b/docs/build-test-reports/euler-beam-3d-build-test.md
@@ -0,0 +1,75 @@
+# 3D Euler-Bernoulli Beam Kernel Build/Test Report
+
+## Metadata
+- feature_id: euler-beam-3d
+- source_implementation_plan: docs/implementation-plans/euler-beam-3d-implementation-plan.md
+- status: pass-for-reference-verification
+- owner_agent: build-test-executor-agent
+- date: 2026-06-12
+
+## Changed Files Observed
+- `docs/research/euler-beam-3d-research.md`
+- `docs/formulations/euler-beam-3d-formulation.md`
+- `docs/numerical-reviews/euler-beam-3d-review.md`
+- `docs/io-definitions/euler-beam-3d-io.md`
+- `docs/reference-models/euler-beam-3d-reference-models.md`
+- `docs/implementation-plans/euler-beam-3d-implementation-plan.md`
+- `src/fesa/model/element.hpp`
+- `tests/unit/model_element_test.cpp`
+- `src/fesa/elements/euler_beam_3d.hpp`
+- `src/fesa/elements/euler_beam_3d.cpp`
+- `tests/unit/euler_beam_3d_local_stiffness_test.cpp`
+- `tests/unit/euler_beam_3d_transform_recovery_test.cpp`
+- `phases/euler-beam-3d/index.json`
+
+## Execution Environment
+- os: Windows, MSVC toolchain through Visual Studio 17 2022
+- generator: Visual Studio 17 2022
+- platform: x64
+- config: Debug
+- build_dir: build/msvc-debug
+- active_override_env_vars: `HARNESS_VALIDATION_COMMANDS`
+- command_discovery_path: `HARNESS_VALIDATION_COMMANDS` with absolute CMake and CTest executable paths
+
+## Command Log Summary
+
+| order | command | exit_code | evidence_tail |
+| --- | --- | --- | --- |
+| 1 | `ctest --test-dir build/msvc-debug --output-on-failure -C Debug -R "model_element_test\|euler_beam_3d_(local_stiffness\|transform_recovery)_test"` | 0 | 3/3 tests passed: `euler_beam_3d_local_stiffness_test`, `euler_beam_3d_transform_recovery_test`, `model_element_test`. |
+| 2 | `python -m unittest discover -s scripts -p "test_*.py"` | 0 | Ran 104 tests, OK. |
+| 3 | `python scripts/validate_workspace.py` with absolute CMake/CTest commands in `HARNESS_VALIDATION_COMMANDS` | 0 | Configure/build succeeded; CTest passed 23/23 tests; validation succeeded. |
+
+## Validation Results
+
+| validation_stage | result | evidence |
+| --- | --- | --- |
+| harness self-test | pass | `Ran 104 tests ... OK`. |
+| configure | pass | CMake generated `build/msvc-debug` with Visual Studio 17 2022 x64. |
+| build | pass | `fesa_core` and all unit/integration test executables built in Debug. |
+| CTest | pass | Full validation passed 23/23 tests. |
+| feature-specific tests | pass | 3/3 feature tests passed with the step 9 CTest filter. |
+
+## Failure Classification
+- classification: N/A
+- primary_failure: N/A
+- first_failed_command: N/A
+- evidence_tail: all required commands passed.
+
+## Failed Test Inventory
+
+| test_name | label | command | failure_summary |
+| --- | --- | --- | --- |
+| N/A | N/A | N/A | No failing tests. |
+
+## Scope Boundary
+This report only records build/test evidence for the kernel increment. It does not approve reference verification, physics sanity, or release readiness. No Abaqus reference solver was run and no reference CSV artifacts were generated or modified.
+
+## No-Change Assertion
+- source_files_modified: false in this report step.
+- test_files_modified: false in this report step.
+- cmake_files_modified: false.
+- reference_artifacts_modified: false.
+- notes: the report documents observed implementation changes from earlier steps but does not add new code.
+
+## Open Issues
+- Full solver release still requires parser integration, section/property mapping, assembly/static solver integration, HDF5 output, stored Abaqus reference artifacts, reference comparison, and physics sanity evidence.
diff --git a/docs/releases/euler-beam-3d-release.md b/docs/releases/euler-beam-3d-release.md
new file mode 100644
index 0000000..127847f
--- /dev/null
+++ b/docs/releases/euler-beam-3d-release.md
@@ -0,0 +1,131 @@
+# 3D Euler-Bernoulli Beam Kernel Release Readiness Note
+
+## Metadata
+- feature_id: euler-beam-3d
+- source_requirement: docs/requirements/euler-beam-3d.md
+- source_formulation: docs/formulations/euler-beam-3d-formulation.md
+- source_numerical_review: docs/numerical-reviews/euler-beam-3d-review.md
+- source_io_definition: docs/io-definitions/euler-beam-3d-io.md
+- source_reference_model: docs/reference-models/euler-beam-3d-reference-models.md
+- source_implementation_plan: docs/implementation-plans/euler-beam-3d-implementation-plan.md
+- source_build_test_report: docs/build-test-reports/euler-beam-3d-build-test.md
+- source_reference_verification_report: N/A
+- source_physics_evaluation_report: N/A
+- status: not-release-ready-kernel-increment-complete
+- owner_agent: release-agent
+- date: 2026-06-12
+
+## Release Scope
+
+| item | included | excluded | notes |
+| --- | --- | --- | --- |
+| analysis_type | element kernel calculations | full linear static solve | Solver integration is not complete. |
+| element_type | two-node straight prismatic 3D Euler-Bernoulli beam kernel | Timoshenko beams, curved beams, offsets, releases, warping | Kernel scope only. |
+| material_model | positive finite `E` and `G` constants supplied to the kernel | material parser or library integration | No material database integration. |
+| section_model | positive finite `A`, `J`, `Iy`, `Iz` constants supplied to the kernel | beam section parser/property integration | Future I/O phase required. |
+| output_quantities | local/global stiffness and local/global end forces returned in memory | HDF5 results, reference CSV views, stress recovery | Authoritative output path is future work. |
+
+## Completed Kernel Increment
+- Added semantic `ElementTopology::beam2`.
+- Added local 12x12 Euler-Bernoulli beam stiffness for axial, torsion, and two bending planes.
+- Added local end-force recovery as `K_local * u_local`.
+- Added local axis construction from two nodes plus an orientation vector.
+- Added global stiffness transformation using `K_global = T^T K_local T`.
+- Added global end-force recovery using the same transformation convention.
+- Added unit tests for topology, local stiffness entries, local symmetry, local force recovery, invalid local inputs, identity transform, rotated symmetry, rigid translation, axial extension, parallel orientation, and zero orientation.
+
+## Missing For Full Feature Release
+- Parser implementation for the approved Abaqus subset.
+- Beam section/property semantic model integration.
+- Material-to-section mapping for `E`, `G`, `A`, `J`, `Iy`, and `Iz`.
+- Assembler and static solver integration.
+- HDF5 result emission for beam displacement, reaction, and internal force quantities.
+- Stored Abaqus reference artifacts under `reference/<model-id>/`.
+- Reference comparison report.
+- Physics sanity report.
+- Final release report with all upstream gates passing.
+
+## Gate Evidence Inventory
+
+| gate | source | expected_status | observed_status | verdict |
+| --- | --- | --- | --- | --- |
+| requirements | docs/requirements/euler-beam-3d.md | sufficient for kernel | draft with explicit kernel scope | pass for kernel |
+| research | docs/research/euler-beam-3d-research.md | ready-for-formulation | ready-for-formulation | pass |
+| formulation | docs/formulations/euler-beam-3d-formulation.md | ready-for-numerical-review | ready-for-numerical-review | pass |
+| numerical_review | docs/numerical-reviews/euler-beam-3d-review.md | pass-for-implementation-planning | pass-for-implementation-planning | pass |
+| io_definition | docs/io-definitions/euler-beam-3d-io.md | future integration contract | ready-for-implementation-planning | pass for planning |
+| reference_model | docs/reference-models/euler-beam-3d-reference-models.md | artifacts present for release | needs-reference-artifacts | fail for release |
+| implementation | source and tests | implemented kernel | implemented kernel | pass for kernel |
+| build_test | docs/build-test-reports/euler-beam-3d-build-test.md | pass | pass-for-reference-verification | pass |
+| reference_verification | docs/reference-verifications/euler-beam-3d-reference-verification.md | pass-for-physics-evaluation | missing | fail for release |
+| physics_evaluation | docs/physics-evaluations/euler-beam-3d-physics-evaluation.md | pass-for-release-agent | missing | fail for release |
+
+## Acceptance Traceability
+
+| requirement_id | release_disposition |
+| --- | --- |
+| EB3D-REQ-001 through EB3D-REQ-011 | Implemented and unit-tested at kernel level. Full solver evidence deferred. |
+| EB3D-REQ-012 | Excluded behaviors remain out of scope. |
+| EB3D-REQ-013 | No reference artifacts were created or modified. |
+| EB3D-REQ-014 | No full Abaqus compatibility claim is made. |
+| EB3D-REQ-015 | Kernel completion is explicitly separate from full solver release readiness. |
+
+## Validation Evidence
+
+| command_or_report | expected | observed | notes |
+| --- | --- | --- | --- |
+| `ctest --test-dir build/msvc-debug --output-on-failure -C Debug -R "model_element_test\|euler_beam_3d_(local_stiffness\|transform_recovery)_test"` | pass | pass, 3/3 tests | Feature-specific CTest filter passed. |
+| `python -m unittest discover -s scripts -p "test_*.py"` | pass | pass, 104 tests | Harness self-test passed. |
+| `python scripts/validate_workspace.py` | pass | pass, 23/23 CTests | Used absolute CMake/CTest commands through `HARNESS_VALIDATION_COMMANDS`. |
+
+## Known Limitations
+
+| limitation | category | user_impact | disposition |
+| --- | --- | --- | --- |
+| No parser support for beam input yet. | input | Users cannot run beam `.inp` models end-to-end. | deferred |
+| No section/property model integration. | model | Constants must be supplied directly to the kernel API. | deferred |
+| No assembly/static solver integration. | solver | Beam elements do not contribute to a global system yet. | deferred |
+| No HDF5 result output for beam quantities. | output | No official solver output exists for beam results. | deferred |
+| No reference artifacts or comparison report. | verification | Full solver correctness against Abaqus is not established. | blocker for release |
+| No stress or strain recovery. | physics/output | Stress CSV and stress HDF5 datasets are not available. | deferred |
+| No shear deformation, warping, releases, offsets, mass, geometric stiffness, nonlinear, dynamic, or thermal behavior. | physics | Feature is limited to the approved Euler-Bernoulli kernel. | documented |
+
+## Release Notes Draft
+
+### Feature Summary
+- Kernel increment for a two-node 3D Euler-Bernoulli beam element is complete.
+
+### Verification Scope
+- Unit-tested local stiffness, local end forces, global transform, global end forces, and invalid geometry/section handling.
+
+### Main Limitations
+- This is not an end-to-end solver feature. Parser, assembly, HDF5 output, reference comparison, and physics sanity remain future gates.
+
+### Artifacts
+- docs/build-test-reports/euler-beam-3d-build-test.md
+- docs/requirements/euler-beam-3d.md
+- docs/formulations/euler-beam-3d-formulation.md
+- docs/reference-models/euler-beam-3d-reference-models.md
+
+## Release Verdict
+- verdict: not-release-ready-kernel-increment-complete
+- reason: kernel implementation and build/test validation are complete, but full feature release lacks parser integration, HDF5 output, reference artifacts, reference verification, and physics sanity evidence.
+
+## Handoff Recommendation
+
+| target_agent | reason | required_input |
+| --- | --- | --- |
+| Coordinator Agent | Decide next phase sequencing. | This release note and phase index. |
+| I/O Definition Agent | Finalize exact Abaqus beam subset and section/orientation keywords. | Current I/O contract and kernel API behavior. |
+| Reference Model Agent | Generate approved future reference artifact contracts and then artifacts in an explicit phase. | Reference model contract. |
+| Implementation Agent | Integrate kernel into parser/model/assembly only after upstream contracts are approved. | Implementation plan and build/test report. |
+
+## No-Change Assertion
+- source_files_modified: false in this release note step.
+- test_files_modified: false in this release note step.
+- cmake_files_modified: false.
+- reference_artifacts_modified: false.
+- tolerance_policies_modified: false.
+
+## Open Issues
+- Full solver release remains blocked until the missing gates listed above are completed.
diff --git a/phases/euler-beam-3d/index.json b/phases/euler-beam-3d/index.json
index 45e27fd..f7ae729 100644
--- a/phases/euler-beam-3d/index.json
+++ b/phases/euler-beam-3d/index.json
@@ -93,7 +93,8 @@
     {
       "step": 9,
       "name": "build-test-report",
-      "status": "pending",
+      "status": "completed",
+      "summary": "3D Euler beam build/test report added",
       "allowed_paths": [
         "docs/build-test-reports/euler-beam-3d-build-test.md"
       ]
@@ -101,7 +102,8 @@
     {
       "step": 10,
       "name": "release-readiness-note",
-      "status": "pending",
+      "status": "completed",
+      "summary": "3D Euler beam release readiness note added",
       "allowed_paths": [
         "docs/releases/euler-beam-3d-release.md"
       ]