# GAL-FINGERPRINT-I Gate A Pilot Result Record

**Project:** `UNNS_GALAXY_STRUCTURAL_FINGERPRINTS_v0_1`  
**Protocol:** GAL-FINGERPRINT-I v0.1  
**Execution date:** 2026-07-26  
**Status:** `GATE_A_ENGINEERING_PASS`  
**Scientific verdict:** none; the pilot is excluded from confirmatory metrics

## 1. Preserved chamber-output archive

```text
outputs/exports/struc_i/gal_fingerprint_i/pilot/pilot.zip
SHA256 8babeb93fe33819ba116cba9897d4b46a7a874f14844bd84d429efad564ca2fb
```

The archive contains 17 JSON exports and 17 CSV exports. The individual files are also preserved in the same canonical direct-export directory.

## 2. Execution-integrity audit

```text
Registered realizations             100
Valid complete realizations         100
Missing realizations                  0
Unknown ladders                       0
Duplicate direct-export files         0
JSON/CSV export pairs                17
Complete profile rows              4000
κ points per realization             40
Non-finite curve coordinates          0
```

All 17 export pairs were matched by their internal ladder-name sets rather than by browser-generated filenames. Every pair passed:

- STRUC-I version `1.0.4`;
- κ range `[0.01, 1.0]`;
- 40 logarithmic κ points;
- 2,000 Monte Carlo runs per κ point;
- JSON/CSV ladder-set equality;
- JSON/CSV curve-coordinate agreement;
- canonical κ-grid validation;
- exact registration against the 100-ladder pilot manifest.

All run-manifest records are marked `VALID_COMPLETE`.

## 3. Metadata deviation

The chamber JSON field `dataset.family` and `dataset.class` is blank in all 17 exports, although the pilot runbook requested:

```text
GAL_FINGERPRINT_I_PILOT
ENGINEERING_PILOT
```

This is recorded as a non-computational metadata deviation. It does not alter the chamber calculation or prevent exact source identification because every ladder is registered by name, input path, input SHA256, batch ID, export SHA256, and timestamp. Future Gate B executions should populate these fields and the export manifest now records their actual values explicitly.

## 4. Engineering retrieval diagnostics

These numbers are **not** GAL-FINGERPRINT-I evidence and cannot trigger any protocol verdict. They only verify that the registered gallery, standardization, distance, rank, and summary machinery executes on real chamber outputs.

Primary `ρ`-curve distance against the frozen 121-galaxy R1 gallery:

| Branch | Realizations | Strict top-1 | Top-5 | Median own/wrong ratio | Median margin |
|---|---:|---:|---:|---:|---:|
| C | 24 | 0.000 | 0.000 | 2.757 | -0.397 |
| L | 12 | 0.667 | 0.833 | 0.751 | 0.035 |
| M | 16 | 0.500 | 0.562 | 1.233 | -0.051 |
| N_GAP | 12 | 0.667 | 0.833 | 0.831 | 0.037 |
| N_UNIFORM | 12 | 0.000 | 0.000 | 2.742 | -0.626 |
| T | 24 | 0.125 | 0.167 | 3.411 | -0.295 |

Engineering observations:

- single-radius deletion retained the source most often in this small panel;
- uniform-range nulls produced no top-5 source recoveries, showing that point count plus total range alone did not reproduce the pilot identities;
- gap-order nulls often remained close to the original source, an important warning that the chamber response may retain substantial information from the preserved gap multiset even after gap ordering is changed;
- n=8 coverage controls and n=10 thinning moved most pilot curves far from their full-profile R1 references;
- mass-to-light variants were mixed, with bulge variants more stable in this small panel than disk variants;
- the three frozen distance representations were all calculated successfully, but they did not behave interchangeably.

These are pilot diagnostics from 12 deliberately selected galaxies and one pilot realization per registered subtype. They must not be described as population estimates or used to alter the accepted metric, sample, branches, or thresholds.

## 5. Reproducible outputs

```text
runs/gal_fingerprint_i/manifests/run_manifest.csv
runs/gal_fingerprint_i/manifests/export_file_manifest.csv
runs/gal_fingerprint_i/manifests/export_audit.csv
runs/gal_fingerprint_i/consolidated/profiles_long.csv
runs/gal_fingerprint_i/consolidated/source_retrieval_results.csv
runs/gal_fingerprint_i/consolidated/branch_summary.csv
runs/gal_fingerprint_i/consolidated/realization_summary.csv
```

The export-file manifest includes the registered batch ID and the actual dataset-family/class metadata recorded by each JSON export.

## 6. Gate decision

```text
GATE_A_ENGINEERING_PASS
```

Gate A established that the complete ladder-generation, batching, direct-export preservation, pairing, validation, consolidation, and registered-distance pipeline works on real STRUC-I output.

The next registered action is **Gate B**:

```text
complete unchanged-ladder repeats R2, R3, R4, and R5
then evaluate the instrument reproducibility gate
```

No full deletion, thinning, coverage, mass-to-light, or null branch is authorized before Gate B passes.

---

## v0.3 project interpretation

This document contributes to the galaxy structural-fingerprint programme. Numerical, technical, protocol, or provenance content above is preserved. The canonical interpretation is that the fingerprints are reproducible, organized, and galaxy-specific; sampling, coverage, and baryonic-preparation dependence describe the transformation of fingerprint expression and do not erase the structural finding.

