SOURCE_DIGEST: 518ed9ca8fbc51b2da15737d12261a4b1e85d254c5a2a327033ecc6eb68a0630

This correction-round review evaluates the revised CatDB Paper 12 manuscript against the three actionable findings from the previous round.

### Verification of Prior Findings

1. **Primary SPANN and Earlybird Baselines with Retrieval-Specific Metrics:** **Resolved.**
   The authors successfully integrated primary citations for SPANN (\citep{P12S35ChenEtAl2021}) and Earlybird (\citep{P12S36BuschEtAl2012}) into Section 9.2. Furthermore, Section 12.2 and Table 3 correctly incorporate these systems into the evaluation contract as physical baselines for vector and full-text locality. The text explicitly pins retrieval-specific metrics (e.g., recall at $k$, index-build resources, query fanout, term/document skew) and correctly enforces that approximate retrieval results cannot be evaluated using relational completeness language. 

2. **Row-Level Shard-Key Mutations Classified as Cross-Shard Migrations:** **Resolved.**
   Section 3.4 now explicitly defines any row update that changes the effective partition key as a cross-shard migration, correctly identifying that modifications to semantic dimensions (e.g., region, semantic-object assignment, workspace scope) necessitate migration protocols. The manuscript strictly enforces read-snapshot cuts, distinct coverage predicates, write ownership, and duplicate suppression keyed by stable row/mutation identities. This is structurally reinforced by Nonclaim 28 and the explicit rejection of claim `P12-D16` in Appendix A.

3. **Fail-Closed Mapping-Version Evidence with Explicit Witness:** **Resolved.**
   The `CoveragePredicate` definition in Listing 3 has been correctly updated. The mapping scope is no longer optional (`MappingVersionId?`). Instead, it is enforced via a strict sum type: `BoundTo(MappingVersionId) | MappingIndependent(MappingIndependenceWitness)`. The text in Section 3.3 clearly dictates that a missing, unknown, or invalid mapping scope fails closed and cannot be used for logical disjointness pruning. This addresses the vulnerability identified in CE-02 and is appropriately documented in Nonclaim 29 and the rejection of claim `P12-D17`.

### Re-Audit of the Manuscript

A complete re-audit confirms that the manuscript is technically rigorous and well-bounded:
- **Technical Correctness & Boundaries:** The separation of logical partition descriptors from physical placement and replication is clean. The `RoutingObligation` proofs correctly prevent query planners from discarding critical requirements such as policy withholding, workspace isolation, and semantic multiplicities.
- **Reproducibility & Overclaiming:** The authors maintain a highly disciplined stance on the current state of the system. The manuscript repeatedly clarifies that this is a *provisional research specification* and explicitly rejects any notion that a P12 routing runtime, exchange executor, or cross-shard benchmark currently exists. The distinction between physical statistics and semantic metadata benefits is testable and falsifiable (Table 7).
- **Citations:** The bibliography aligns closely with distributed systems and query planning literature. Incorporating SPANN and Earlybird addresses the prior gap in vector/full-text distribution. 
- **Readability & Formatting:** The manuscript is clearly organized, well-formatted, and matches the expected LaTeX/arXiv standards. 

The authors have robustly addressed all prior feedback while maintaining strict formal boundaries around what constitutes a physical placement obligation versus a logical coverage hypothesis. No new major or minor issues were introduced during the correction round.

VERDICT: ACCEPT