Holistix Open Biohacking Data Project v1.5.0: Interoperability and Reproducibility Release

Version 1.5.0 is an interoperability, reproducibility, and machine-readable packaging release of the Holistix Open Biohacking Data Project. This release adds Frictionless-style Data Package metadata, machine-readable tabular schemas, a human-readable data dictionary, a Schema.org JSON-LD catalog, RO-Crate 1.2 metadata, deterministic JSONL exports, generated provenance, explicit project identity and release-lineage metadata, and deterministic release-build verification. The eight canonical subject datasets remain at dataset version v1.2. The project provides structured reference data covering PEMF, red light therapy, infrared therapy, hydrogen water, terahertz devices, negative ion technologies, wellness-device safety, claims, evidence metadata, source metadata, product relationships, and related machine-readable infrastructure. Release validation includes Frictionless Data Package validation, RO-Crate 1.2 validation with 65 of 65 required checks passing, JSON and JSONL parsing validation, deterministic regeneration checks, and clean release-build rehearsal. Concept DOI for all versions: 10.5281/zenodo.20978709