**Overall Verdict:** Accept — The submission is complete, professionally scoped, objectively gradable, and reachable, with public-benchmark leakage appropriately addressed through evaluator isolation and offline solving.

**Completeness Check:**
- Instruction: Complete — The objective, integrity constraints, five sequences, output schema, compute budget, and completion criteria are explicit and internally consistent.
- Inputs: Complete — The solver bundle defines the exact 4,915-frame input set and includes a standard-library downloader that statically excludes ground-truth directories; remote availability was not independently tested under the review evidence boundary.
- Toolchain: Complete — A legally obtainable Python, detector, tracker, and CPU/GPU execution path is described without requiring a particular proprietary implementation.
- Reference output: Complete — Evaluator-only ground truth, five oracle outputs, five naive-association calibration outputs, sequence metadata, attribution, and vendored evaluation code are present. All 46,283 rows in each reference-output set have consistent numeric schemas; oracle IDs are correctly shifted from zero-based ground-truth IDs to positive submission IDs.
- Rubric: Complete — The grader implements the stated format gates, official combined-sequence HOTA/DetA/AssA/IDF1 evaluation, and the documented clipped linear score.

**File and Task Reachability:**
Attachment classification: `reachable`. Task classification: `reachable`.

Both `03_input_materials.zip` and `03_reference_output_and_grader.zip` were inspected. Their downloaded sizes matched the manifest. Both were readable, unencrypted ZIP archives with valid container integrity, no unsafe paths, links, device entries, or excessive expansion. The input archive contained two UTF-8 text members: the solver statement and downloader source. The reference archive contained 136 members, including the grader, all five ground-truth and sequence-metadata sets, ten reference tracker files, attribution and license material, and vendored TrackEval source. All members were inventoried and typed; grading-relevant source and representative schemas were inspected. Ancillary TrackEval documentation, tests, and unrelated dataset adapters were inventoried but not reviewed line by line. Uploaded programs were not executed, and external mirrors, project pages, licensing claims, and published benchmark scores were not independently accessed.

The end-to-end path is coherent: obtain or stage only the five image sequences, run an allowed person detector and association tracker, emit five MOTChallenge files, apply deterministic format validation, then evaluate against isolated ground truth using combined HOTA and identity metrics. 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` — DanceTrack and its validation annotations are explicitly identified as public, making protected answers network-retrievable. The submission materially mitigates this through separate evaluator-only packaging, a downloader that excludes ground truth, transcript auditing, and a recommended workflow that stages allowed inputs and weights before disabling solver network access. External provenance and benchmark claims could not be independently checked within the evidence boundary.

**Recommended Changes:**
The submission is ready and requires no material contributor changes. Operationally, keep the reference archive entirely evaluator-only and disable solver networking after staging frames and allowed code and weights. Optional grader hardening would reject extra submission files, enforce `-1` in the final three fields, cap file sizes and track-ID magnitude, and verify exact HTTP range responses in the downloader.