Part of the EPS Research multi‑epoch kinematic platform: Full datasets, cross‑epoch corpora, executable examples, and the Astro‑Extractor are available at https://github.com/eps-research/rag-corpus-series The High-z Kinematic Corpus Z1 is the fourth and final corpus in the EPS Research RAG Astrophysics Corpus Series, completing a unified machine-readable knowledge base spanning stellar clusters, local dwarf irregulars, nearby spiral galaxies, and the high-redshift universe. EPS Research RAG Astrophysics Corpus Series (complete): # Corpus Content Tracer DOI 1 Unified HI Corpus v7.0 438 galaxies, z=0 HI 21cm 10.5281/zenodo.19563417 2 Dwarf/Irregular Corpus v1.0 129 galaxies, z=0 HI 21cm 10.5281/zenodo.20320362 3 Milky Way GC Corpus v1.3.1 174 globular clusters Multi-survey 10.5281/zenodo.19907765 4 High-z Kinematic Corpus Z1 31 galaxies, z=4.3–5.7 [CII] 158μm this record Together these four corpora form a unified RAG knowledge base covering galactic kinematics from Milky Way globular clusters through local spiral and dwarf galaxies to the epoch approaching cosmic reionization. Each corpus is independently deployable as a retrieval-augmented generation (RAG) source for LLM-based astrophysical research pipelines, and collectively they support cross-redshift kinematic analysis under the Flynn & Cannaliato (2025) omega correction framework (DOI: 10.3389/fspas.2025.1680387). This corpus — High-z Kinematic Corpus Z1: ALMA [CII] 158μm morpho-kinematic data for 31 star-forming main sequence galaxies at z = 4.26–5.68 from the ALPINE survey (Jones et al. 2021, MNRAS). Eight confirmed rotators (ROT) carry quality tier 1 per-ring rotation curves from 3DBarolo tilted-ring fits with 2–3 rings per galaxy, Vrot and σ per ring, and dynamical mass estimates. The remaining 23 galaxies carry morpho-kinematic classification only (quality tier 2). All galaxies include stellar mass (Faisst et al. 2020), SFR, Wisnioski et al. (2015) disk criteria, and geometric parameters. File formats: Single nested JSON, RAG-ready JSONL (one galaxy per line), flat summary CSV (31 rows), per-galaxy ZIP archive, three executable Jupyter notebook examples with output figures, and full ingestion and validation scripts. Key results from worked examples: Applying the Flynn & Cannaliato (2025) omega formula to all 8 tier-1 rotators yields negative omega values (median −13.05 rad/Gyr, range −33.22 to −2.96 rad/Gyr), contrasting with positive values at z=0 (SPARC mean +7.06, dwarf median +9.94 rad/Gyr). The sign reversal is consistent with the known evolution from compact centrally-dominated systems at high-z to extended rotating disks at z=0. No baryonic decomposition is available at z~5; these are observational kinematics only. Important caveats: Maximum redshift is z=5.6773 (DC773957), not z=6. Tier-1 quality is limited by ALMA resolution (~6–7 kpc beam at z~5) and 2–3 rings per galaxy. No baryonic decomposition available. Full validation requires future deep ALMA + JWST observations. Primary data sources: Jones et al. (2021), MNRAS, arXiv:2104.03099; Le Fèvre et al. (2020), A&A 643, A1; Béthermin et al. (2020), A&A 643, A2; Faisst et al. (2020), ApJS 247, 61. ALMA project 2017.1.00428.L. Full Platform: This dataset is part of the EPS Research multi‑epoch kinematic platform (SPARC + THINGS + LITTLE THINGS + WALLABY DR2 + Milky Way GC corpus + z≥6). All corpora, executable notebooks, the Astro‑Extractor, and the unified schema are available at: https://github.com/eps-research/rag-corpus-series Eq.6 operator-precedence correction (2026-07-12)