**Overall Verdict:** Strong Accept — Complete, coherent, professionally specified, objectively evaluable, and reachable without material defects.

**Completeness Check:**
- Instruction: Complete — Clear recovery objectives, evidence precedence, seven-file output contract, safety constraints, and validation requirements.
- Inputs: Complete — Physical backups, WAL/history, evidence, contracts, replay source, schemas, and faulty artifacts are present and hash-verified.
- Toolchain: Complete — PostgreSQL 17.11, standard Python, tar/gzip, and coreutils are identified with a reproducible package path and licensing.
- Reference output: Complete — The reference archive contains the seven gold outputs, trusted schemas, truth data, and documented evaluator assets.
- Rubric: Complete — Weighted components, hard gates, caps, invariant checks, and infrastructure-failure handling are explicit.

**File and Task Reachability:**
Attachments are `reachable`; the end-to-end task is `reachable`. I inspected both ZIP inventories, all Markdown reports, input contracts, evidence files, compressed broker/event data, physical tar structures, reference CSV/JSON/schema artifacts, package metadata, and evaluator source. ZIP CRCs, gzip streams, JSON/NDJSON parsing, SHA-256 input records, tar paths, member types, and duplicate-name checks passed. No attachment was inaccessible or left structurally unreviewed; large truth and event data were reviewed through bounded samples and summaries. The local review runtime lacked PostgreSQL binaries, so custom dump restoration and TOC parsing were not performed; this is a reviewer-tooling limitation, while the supplied evaluator path pins PostgreSQL 17.11.

The solver-visible input/reference boundary is documented and enforced by the lifecycle source: references are withheld during solve and staged only for evaluation. The physical inputs expand to approximately 1.46 GB, which is reasonable for the declared single-machine environment. The evaluator provides an objective path from seven output files to isolated PostgreSQL restoration and deterministic scoring.

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:**
- `synthetic_defect_fixture` — The task explicitly centers on predetermined faulty migration and emergency-replay defects, with the unsafe SQL marked as evidence-only. This is an intentional synthetic recovery fixture, not a submission defect.
- No affirmative evidence of AI-originated ground truth or a publicly identifiable benchmark was found. Public-search verification was unavailable.

**Recommended Changes:**
No material task changes are required. Separate portal-side provenance, rights, authorship, and signature fields noted in the QC documentation remain administrative follow-ups.