# GRAV-BRIDGE-I v0.1.0

**Structural Gravitational Response — Out-of-Sample Bridge Test**

This is a self-contained Python chamber with a local browser interface, command-line engine,
registered SPARC inputs, tests, and a frozen protocol.

## Quick start on Windows

1. Extract the ZIP to a normal writable folder.
2. Double-click `RUN_GRAV_BRIDGE_I.bat`.
3. The chamber opens at `http://127.0.0.1:8765`.
4. Validate the bundled registered inputs.
5. Run the chamber and download the complete result package.

The Windows launcher creates a short-path environment at `%LOCALAPPDATA%\\UNNS\\GBI010` when necessary and installs the requirements there. This avoids Windows path-length failures when the chamber is stored deep inside the UNNS project tree. It does not send data to a remote service.

## Scientific boundary

The chamber asks whether STRUC-I and STRUC-PERC-I signatures add held-out predictive
information beyond a nonlinear baryonic-acceleration baseline, normalized radius, and ordinary
ladder statistics. It does not recompute chamber outputs and does not claim causation.

## Registered data included

- `data/default/sparc_profiles.csv`
- `data/default/chamber_signatures_primary_121.csv`

## Tests

Run `RUN_TESTS.bat` or `python -m pytest -q`.

## Outputs

Each run exports model comparison, fold registry, held-out predictions, per-galaxy metrics,
feature ablations, null distributions, figures, JSON, Markdown, hashes, and a ZIP archive.

---

## v0.3 project interpretation

This document belongs to the external transfer experiment. Numerical, technical, protocol, or provenance content above is preserved. The transfer result tests one static global architecture: it does not negate the galaxy-specific structural information carried by the curves. Complete curves retain identity, and ρ is the leading channel for local or regime-conditioned follow-up.

