**Overall Verdict:** Strong Accept — The submission is complete, internally consistent, objectively verifiable, and fully reachable with no material risks.

**Completeness Check:**
- Instruction: Complete — The specification clearly defines bracketing, shortest-path SLERP, linear translation interpolation, quaternion canonicalization, geodesic angles, query ordering, and the exact output schema.
- Inputs: Complete — `scene.json` is valid ASCII JSON containing five strictly ordered, finite trajectory poses with unit quaternions and five in-range queries, including endpoint and negative-dot shortest-path cases.
- Toolchain: Complete — Python 3.11, NumPy 1.24+, and Linux form a legally obtainable, compatible, single-machine toolchain requiring no network access.
- Reference output: Complete — `result.json` contains exactly five schema-conforming records. Independent calculations reproduced its rotations, translations, and consecutive angles within floating-point precision.
- Rubric: Complete — The binary evaluator checks record count and order, exact entry keys, finite numeric types, timestamps, quaternion norm and canonicalization, sign-invariant rotation error, translation error, null handling, and angle tolerances.

**File and Task Reachability:**
The attachment set is `reachable`, and the end-to-end task is `reachable`. All four files were inspected in full: `scene.json`, `SPEC.md`, `result.json`, and `grader.py`. Their actual formats, encodings, and byte counts match the manifest; all are readable text rather than containers, and no content was left unreviewed. The evaluator was safely reviewed as source text without execution. No material tooling limitation affected the assessment. Solver-visible inputs are separated from the reference and evaluator assets by their declared roles. A solver can read the scene and specification, compute the five requested poses using the declared offline toolchain, produce the required JSON artifact, and receive deterministic evaluation against the supplied reference. 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 provides coherent inputs, a mathematically correct reference, and a hardened evaluator. No changes are required.