#software testing Open access

ENGINE

Gustavo Alves Conde

Sep 2026 · Zenodo (CERN European Organization for Nuclear Research)

Abstract

ENGINE v1.3.6 - JOSS Ready Release This release finalizes the JOSS-compatible paper and corrects all YAML/Markdown validation errors that blocked automated PDF build. Paper fixes: Fix paper.md YAML frontmatter: corrected affiliations: indentation (was nested inside authors: causing expected '-' indicator at line 8) Correctly closed bash code fences in Installation section Validated header: title, tags, authors, affiliations, date, bibliography Added all required JOSS sections: Summary, Statement of need, State of the field, Software design, Research impact, AI usage disclosure, Acknowledgements, References Bibliography: Added paper/paper.bib with @lelli2016 SPARC (ApJ 152, 157) and @scolnic2022 Pantheon+ (ApJ 938, 113) - DOI verified Citations: [@lelli2016] and [@scolnic2022] now resolve for JOSS PDF build Model: ENGINE: Emulator of New Generation for Expansion - phenomenological framework for active vacuum (Aeternum Vacuum) Implements Lambda_eff(Z0, ∇I) where I = log(1 + rho/rho0) [Conde Ruler] + Conde Triangle mapping f(|∇I|) Recovers ΛCDM when |∇I| → 0 Modules: engine.core.conde_ruler, engine.core.conde_triangle, engine.cosmology.background, engine.data loaders Data & Reproducibility: Public catalogs only (user must download): SPARC 2016, JWST CEERS, Pantheon+SH0ES + BAO Examples: basic_run.py, Hubble diagram Tests: pytest for conde_ruler and lambda_eff Docs: docs/data.md Metadata: Author: Gustavo Alves Conde, ENGINE Labs (PIC 861720453) License: MIT DOI: 10.5281/zenodo.22849189 (Zenodo auto-update on this release) Target: MNRAS + JOSS dual submission, TRL 3-4 → 6 Python 3.10+ with Numba Ready for JOSS submission: https://github.com/gustavosouzaconde40-ai/ENGINE

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