# BORA Gold Quality Audit

Target pass: **True**
Grade-point average: **3.66** (B+=3.30)

| Unit | Grade | Value | Gate |
|---|---:|---|---|
| Immutable artifact lineage | A | `1.0` | all pair/manifests/split SHA-256 values resolve |
| Address-grounded true-strip alignment | A | `0.995` | P1 DWARF address mapping; stripped analysis never receives source names |
| Real-project breadth | A | `138` | distinct immutable repositories |
| Gold sample size | A | `42449` | accepted nontrivial P1 pairs |
| Compiler-family diversity | B+ | `2` | independent compiler families |
| Architecture diversity | A | `3` | distinct target architectures |
| Binary container diversity | B+ | `{"elf": 40733, "pe": 1716}` | distinct executable container formats represented by accepted P1 pairs |
| OS/libc diversity | B+ | `{"libcs": {"glibc": 40733, "mingw": 1716}, "operating_systems": {"linux": 40733, "windows": 1716}}` | distinct target OS and libc/runtime families represented by accepted P1 pairs |
| C++ ABI diversity | C | `{"itanium": 8020}` | Itanium and MSVC ABI coverage are tracked separately |
| Same-source cross-domain positives | B | `{"fraction": 0.26503186478248825, "multi_domain_source_occurrences": 1913, "source_occurrences": 7218}` | same source occurrence has two or more independently built target profiles |
| Optimization diversity | A | `4` | distinct optimization modes |
| Repo/lineage/near-clone disjoint split | A | `{"minimum_holdout_repositories": 14, "overlap": {"development_test": 0, "train_development": 0, "train_test": 0}}` | zero lineage overlap and sufficiently broad development/test repositories |
| Multi-seed development stability | A | `0.0033506449991623777` | three seeds; Recall@1 max-minus-min |
| Frozen selection/evaluation lineage | A | `1.0` | development-only selection and test/model SHA-256 values form one immutable chain |
| Frozen internal test retrieval | A | `{"baseline": "v14_champion", "mrr_delta": 0.05932346545058792, "paired_ci_lower": {"mrr": 0.05392515608399423, "recall_at_1": 0.05624834173520826}, "recall_at_1_delta": 0.06394269036879807}` | selected on development only; paired query bootstrap on untouched test |

External blind gate: **not_run; excluded from grade and required before production promotion**