**Overall Verdict:** Strong Accept — The submission is complete, professionally scoped, reachable, and supported by reference outputs that match independent reconstruction from the supplied data.

**Completeness Check:**

- Instruction: Complete — Dates, hub membership, service-day arithmetic, restrictions, tie-breaking, null rules, and interpretation limits are explicit.
- Inputs: Complete — The frozen GTFS extract, scope, contract, attribution, and provenance records are supplied; declared sizes, row counts, and packaged hashes match.
- Toolchain: Complete — Python and PyArrow provide a practical, open-source, single-machine workflow without external services during computation.
- Reference output: Complete — All four required artifacts are present and readable; every keyed table cell and audit field matched independent reconstruction.
- Rubric: Complete — Visible requirements define exact comparisons, 30/25/30/15 weighting, partial credit, and hard failures. Grader inspection supports these rules, and supplied records report 56 passing tests.

**File and Task Reachability:**

Attachment classification: `reachable`. Task classification: `reachable`.

Both `solver_inputs.zip` and `evaluator_bundle.zip` were inspected, including every archive member. Neither archive presents encryption, unsafe paths, corruption, or unreasonable expansion.

Inspected materials include `TASK.md`, `scope.json`, `contract.json`, `SOURCES.md`, both package manifests, the source manifest, and all nine GTFS tables: agency, calendar, calendar exceptions, feed information, routes, stops, stop times, transfers, and trips. Evaluation materials inspected include the README, grader, reference builder, independent SQLite checker, mutation-test source, validation records, and all four reference outputs.

No required member remains uninspected. Uploaded programs were reviewed statically, not executed. The reported tests were not rerun. Linux execution and external provenance, licensing assertions, and possible public benchmark overlap were not independently verified; these limitations do not reveal a material workflow barrier.

The completion path is coherent: expand calendars, reconstruct dated hub events, calculate night metrics and bounded connection opportunities, write the four contracted outputs, and evaluate them against the protected reference. Solver inputs and evaluation answers are cleanly separated and must remain so.

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 task combines authentic schedule data, precise computational requirements, objective evaluation, and appropriately bounded transportation claims. No changes are required.