This book is a restructured, cross-linked edition of Juno’s docs/ folder. Every chapter is
traceable to one or more original files in the Juno repository. Where content from several
source files was merged into a single chapter, or a single source file was split across several
chapters, that is noted below.
Part I. Getting Started¶
| Chapter | Source file(s) |
|---|---|
| 1. What Is Juno | README.md (root), docs/features.md |
| 2. Architecture Reference | docs/arch.md |
| 3. Commands and Flags | docs/howto.md (commands, flags, build/test sections) |
| 4. Running Modes | docs/howto.md (usage examples, diagnostics, metrics sections) |
| 5. The OpenAI-Compatible REST API | docs/howto.md (API section), docs/arch.md (REST layer), docs/features.md |
| 6. JVM Integration | docs/howto.md (JVM integration section), README.md (root) |
| 7. AWS Deployment | docs/howto.md (AWS section), docs/aws-free-tier-billing.md, docs/aws-chat-deployed.png |
Part II. LoRA Fine-Tuning¶
| Chapter | Source file(s) |
|---|---|
| 8. LoRA Fundamentals | docs/LoRA.md |
| 9. Training and Inference Workflows | docs/LoRA.md |
| 10. Producing Standalone Merged Models | docs/LoRA.md (merge section) |
Chapters 8–10 also draw current-state details — DoRA, rsLoRA, QA-LoRA, multi-architecture
routing, and the LoRA JFR event catalog — from docs/lora-plan/PLAN-LoRA-ROADMAP.md and
docs/lora-plan/PLAN-LoRA-Tier1.md through PLAN-LoRA-Tier7.md, presented here as plain
statements of current capability rather than as a tiered project roadmap.
Part III. Model Support and Performance¶
| Chapter | Source file(s) |
|---|---|
| 11. Model Support Matrix | docs/model_support_summary.md |
| 12. Phi-3 Inference Internals | docs/phi3-inference-handoff.md |
| 13. Performance Methodology | docs/performance.md |
Part IV. Governance, Legal, and Compliance¶
| Chapter | Source file(s) |
|---|---|
| 14. Governance | docs/GOVERNANCE.md |
| 15. Contributing and the Release Process | docs/contributing.md |
| 16. Contributor License Agreement | docs/CLA.md |
| 17. Legal Reference | docs/legal.md (also Legal.md at repository root, identical content) |
| 18. Commercial Services | docs/commercial.md |
| 19. EU AI Act Compliance Analysis | docs/EU-AI-Act-compliance.md |
Notes on remixing¶
Chapter 1 combines the project overview from the repository root
README.mdwith the feature-level detail fromdocs/features.md, since both covered the same ground at different altitudes.Chapter 5 consolidates the OpenAI-compatible API contract that previously appeared in three places (
docs/howto.md,docs/arch.md,docs/features.md) into a single reference, since all three described the same endpoints without disagreement.Chapters 8–10 fold in the current-state outcomes of the LoRA engineering roadmap (DoRA, rsLoRA, Kaiming initialization, QA-LoRA, per-architecture LoRA handlers, and the full LoRA JFR catalog) directly into the fundamentals, workflow, and merge chapters, rather than as a separate roadmap section, so the LoRA chapters describe what Juno’s LoRA support does today.
Chapter 12 reframes
docs/phi3-inference-handoff.md— originally an agent debugging handoff note with dated, incident-style framing — as a plain technical reference to Phi-3’s tokenization, RoPE, and cluster-precision behavior, plus the verification method againstllama.cpp.Chapter 19 corrects the model-support status referenced in
docs/EU-AI-Act-compliance.md(originally written while Phi-3 support was in progress) to match the current status recorded in Chapter 11, and aligns the JFR event list with the current six-event catalog described in Chapter 2.