SOURCE_DIGEST: 477c284657b5836526cbd307629771f1de44602b379d028c52f91f94fda5f193

Round 1 Hardening Verifications:
1. **Feasibility of Nonlinear Source Limits**: Verified. Section 7.3 correctly upgrades rate, concurrency, quota, and saturation caps to hard resource limits in step 2 of the decision algebra, strictly preceding latency ranking.
2. **Filtered-Vector Exact Oracle**: Verified. Sections 9, 10.9, and 11.6 explicitly require the identical metadata predicate to be applied before exact distance calculation to establish valid ground truth. Unfiltered exact search is correctly barred as a reference for filtered queries.

Audit of Dimensions, Semantics, Evaluation, Nonclaims, and Evidence Boundaries:
- **Dimensional Validity**: The `Predict` outcome vector safely preserves natural units (bytes, ms, CPU ns, exact counts) without collapsing them into an arbitrary dimensionless scalar. Exclusions (e.g., carbon, business value, unobserved remote work) are clearly and properly delineated.
- **Feasibility-before-Cost**: The two-stage protocol is mathematically preserved. The proposition in Section 5 correctly observes that finite penalties cannot repair hard constraints under arbitrary scalar weights.
- **Candidate/Decision Semantics**: The decision algebra (`Choose`, `Probe`, `Fallback`, `NoFeasible`, `Abstain`) provides a robust and honest vocabulary for uncertainty. The decision certificate guarantees replayability and accounts for all pruned branches.
- **Evaluation Protocol**: The ablation ladder properly isolates physical, capability, and semantic features. The acceptance gates demand strict accounting of metadata overhead, require retained failure observations, and successfully prohibit scale extrapolation.
- **Exact Nonclaims**: Comprehensive and cleanly separate the theoretical integration proposal from established prior art (System R, Calcite, Trino, semantic caching, vector indexing).
- **OPEN/OBSTRUCTED Status**: Transparently and accurately applied. The manuscript claims zero implementation, runtime, or scale results for P14, making it a safe, unexaggerated provisional design contract.

Findings:
No remaining actionable major or minor findings. The manuscript is a rigorous, defensible, and highly falsifiable planning contract that protects semantics and source safety against traditional cost-optimizer defects.

VERDICT: ACCEPT