QCB Void vs. Filament Test - Pre-Registration (Version 2: Catalog Correction)

VERSION 2 (April 1, 2026): Amendment DEV-001 - Corrects catalog selection error identified during execution. Specifies appropriate low-z catalogs (Courtois et al. 2023, Tempel et al. 2015) compatible with SPARC redshift range. Documents exploratory result and confirmatory test pathway. Original Version 1 (March 31, 2026) remains accessible.

SSPre-registration of the QCB void vs. filament environment test, deposited before any data access. Specifies exact prediction, methodology, and decision criteria for testing whether galaxies in cosmic voids show different gravitational behavior than filament galaxies after controlling for baryonic properties. This document establishes a public timestamp before analysis begins.