**Overall Verdict:** Accept — The submission is complete, internally coherent, safely reachable, and supported by a valid reference scene and objective automated evaluation.

**Completeness Check:**
- Instruction: Complete — Required script and Blender artifact names, authoritative data source, import restrictions, spatial constraints, and pass criteria are explicit.
- Inputs: Complete — The valid JSON specifies one throne, four pillars, and one arch; the safe ZIP contains all 21 declared OBJ assets; the optional play text is readable and structurally complete.
- Toolchain: Complete — Blender 3.3.21, bundled Python, Linux compatibility, and required `bpy` workflow are clearly identified without external services or commercial dependencies.
- Reference output: Complete — The Blender 3.3 file contains exactly the floor and six required asset instances. Static parsing confirms a 25×25 floor at the origin, unit-scale source geometry, floor contact, nonoverlapping placements, and pillars at the four symmetric `(±8, ±8)` positions.
- Rubric: Complete — The grader covers artifact generation, forbidden geometry, names, source topology, dimensions, two JSON mutations, floor geometry, contact, containment, overlap, and pillar symmetry, with the stated perfect-score threshold.

**File and Task Reachability:**
Attachment classification: `reachable`. Task classification: `reachable`. All attachments were inspected: `design_document.json`, `asset_library_full.zip`, `pericles_script.txt`, `pericles_kitbash_scene.blend`, `GOLDEN_REFERENCE_VALIDATION_LOG.txt`, `SELF_TEST_EVIDENCE_EXPANDED.txt`, and `kitbash_grader.py`. The ZIP is unencrypted, traversal-free, and contains 21 regular OBJ files; all members passed integrity checks. No attachment was omitted, although the optional play text was structurally and representatively sampled rather than read line by line. The reviewer environment lacked Blender, so the grader was not executed; the scene was instead inspected through non-executing binary and SDNA parsing, and its observed geometry agrees with the golden 100/100 log. External provenance and public-version availability were not independently searched under the review constraints.

The end-to-end path is viable: parse the JSON, import only its named OBJ assets, calculate valid placements, create the floor, save the requested script and Blender file, then run the supplied Blender grader against the base and mutated JSON cases. 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:**
None

**Recommended Changes:**
The submission already provides valid inputs, a demonstrably conforming reference scene, and a usable evaluator. No material changes are required. As optional evaluator hardening, apply topology and spatial checks to the mutated-JSON runs as well as count checks, and continue keeping the reference scene, validation logs, and grader hidden from solvers.