**Overall Verdict:** Accept — The submission is complete, coherent, and reachable, with strong deterministic evaluation evidence and only a nonmaterial space-description error.

**Completeness Check:**
- Instruction: Complete — Deliverables, migration constraints, geometry rules, tolerances, and exact BOM/report formats are clearly specified.
- Inputs: Complete — The source IFC, schedule, specification, memo, and provenance are readable and internally consistent; the IFC hash matches the provenance record.
- Toolchain: Complete — Python 3.12 and IfcOpenShell 0.8.5 provide a practical, open-source Linux workflow within the stated single-machine resources.
- Reference output: Complete — All three reference deliverables are present. Independent static checks confirmed IFC4 declaration, preserved identities, 57 SOLIDWALL entities, 57 individually attached complete wall property sets, and 21 geometry-derived BOM areas within tolerance.
- Rubric: Complete — Deterministic hard gates, weighted partial scoring, source-derived expectations, malformed-input handling, and extensive targeted negative tests are supplied.

**File and Task Reachability:**
Attachment classification: reachable. Task classification: reachable. Both ZIP archives matched their manifest byte counts, were unencrypted and CRC-clean, contained safe relative regular-file entries, and had modest expansion sizes. Inspected files included duplex_apartment_ifc2x3.ifc, bom_spaces.csv, spec_sheet.md, qto_memo.txt, PROVENANCE.txt, the reference model/BOM/report, evaluate.py, ifc_geom.py, the naive model/BOM/report, task_card.json, build_log.txt, naive_log.txt, and selftest_review_log.txt; no manifest content was left unreviewed. The source schedule values were confirmed in the IFC quantity records, and all 21 protected BOM areas were independently recomputed from source STEP geometry. The review environment lacked IfcOpenShell, so EXPRESS validation was not independently rerun; static STEP inspection and the supplied validation/self-test logs support that claim. The completion path from IFC2X3 migration through geometry reconciliation and deterministic evaluation is finite and suitable for the declared machine. License keys, accounts, tokens, and other credentials are not required from the contributor. Confidential, proprietary, or internal material may be evaluated as submitted evidence without requiring additional disclosure.

**Special Screening:**
`public_benchmark` — The supplied provenance affirmatively identifies the source as a publicly distributed buildingSMART sample model. The derived migration task and protected reference are bespoke, all necessary inputs are supplied, and no public standard solution is evidenced. External availability of the exact derived task/reference was not independently checked.

**Recommended Changes:**
The submission is ready and requires no material changes. As an optional editorial correction, replace “two stair spaces” with “two hallway spaces (A201 and B201)” when describing the face-based SurfaceModel bodies; the representation-driven specification and evaluator already handle them correctly.