Quick Start Guide

This guide walks you through the minimal steps required to install Psi-Continuum v2, download the required datasets, and reproduce all numerical results and figures reported in the associated publication.

⚠️ Archived release
This guide corresponds to the final archived software version v0.2.3. The workflow described below is frozen and will not change.

1. Install the package

Install the Psi-Continuum v2 package from PyPI:

pip install psi-continuum-v2

2. Download required datasets

Download all observational datasets used in the analysis:

psi-download-data

This command creates the local data/ directory and downloads all the necessary files from the repository.

3. Quick data status check

Verify that all datasets are present and correctly located:

psi-check-data

The command reports missing or misnamed files with clear instructions.

4. Run the full analysis pipeline

Execute the complete reproducibility pipeline:

psi-run-all

This reproduces:

• background model validation
• Supernova Ia likelihood results
• H(z) cosmic-chronometer analysis
• BAO likelihoods (SDSS DR12 + DESI DR2)
• joint χ² analysis
• ε₀ parameter scan
• all publication figures

5. Optional: Interactive CLI menu

For guided exploration, you may also use the interactive menu:

psi-cli

This provides a user-friendly interface to the same workflow steps.

Output

All generated results, figures, and tables are written to the local results/ directory.

These outputs correspond exactly to the numerical results and figures reported in the Psi-Continuum v2 publication.