**Overall Verdict:** Strong Accept — The submission is complete, technically coherent, professionally challenging, objectively scored, and reachable end to end without material risk.

**Completeness Check:**
- Instruction: Complete — The task, controller API, state ordering, actuator and safety limits, determinism, runtime constraint, and exact deliverables are explicit.
- Inputs: Complete — The complete nonlinear plant, controller template, two public scenarios, public evaluation harness, and success specification are present and consistent.
- Toolchain: Complete — A pinned Python, NumPy, and SciPy environment is specified for CPU-only Linux using freely obtainable software.
- Reference output: Complete — The private handoff includes a genuine controller, replay-consistent results, a 32-column trajectory with 1,300 valid rows, a matching report, six hidden cases, and complete baseline metrics.
- Rubric: Complete — The evaluator implements documented hard gates and an explicit weighted score across tracking error, peak error, control effort, and variation.

**File and Task Reachability:**
Attachment classification: reachable. Task classification: reachable. Both `r2r_input_materials.zip` and `r2r_ale_evaluator_handoff.tar.gz` were inspected. Their byte counts and actual formats match the manifest; both containers are readable, unencrypted, modestly sized, and free of unsafe paths, links, or device entries. All members were inventoried and statically inspected, including specifications, plant and harness source, public and hidden scenario schemas, evaluator source, task metadata, licensing and provenance records, reference controller, results, report, and the complete trajectory dataset. The handoff’s internal checksums all match, and its public-input copies are byte-identical to the solver archive. No relevant content remained unreviewed. Uploaded programs were not executed under safe-review rules, so the documented lifecycle runs were not independently reproduced; static inspection nevertheless establishes a complete implementation and evaluation path. Hidden cases, baselines, and reference outputs are clearly separated from solver-visible materials, and evaluator isolation removes hidden files before candidate execution. 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 unusually complete specifications, artifacts, provenance, isolation controls, and validation evidence. No changes are required.