Fix 40 stale appendix title references across 33 files

Updated old appendix titles (e.g. "HuggingFace Ecosystem" to
"HuggingFace: Transformers, Datasets, and Hub") in cross-references
throughout appendices, pathways, syllabi, and chapter sections to
match the renamed appendix structure.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: apartsin

appendices/appendix-a-mathematical-foundations/section-a.5.html

@@ -63,7 +63,7 @@ <h2>Quick Reference Summary</h2>
 
 <div class="whats-next">
     <h2>What Comes Next</h2>
-    <p>Continue to <a class="cross-ref" href="../appendix-b-ml-essentials/index.html">Appendix B: ML Essentials Quick Reference</a> for the next reference appendix in this collection.</p>
+    <p>Continue to <a class="cross-ref" href="../appendix-b-ml-essentials/index.html">Appendix B: Machine Learning Essentials</a> for the next reference appendix in this collection.</p>
 </div>
 
 <section class="bibliography">
@@ -101,7 +101,7 @@ <h2>What Comes Next</h2>
 <nav class="chapter-nav">
     <a class="prev" href="section-a.4.html">A.4 Information Theory</a>
     <a class="up" href="index.html">Mathematical Foundations</a>
-    <a class="next" href="../appendix-b-ml-essentials/index.html">ML Essentials Quick Reference</a>
+    <a class="next" href="../appendix-b-ml-essentials/index.html">Machine Learning Essentials</a>
 </nav>
     <footer>
         <p class="footer-title">Building Conversational AI with LLMs and Agents, Fifth Edition</p>

appendices/appendix-b-ml-essentials/section-b.4.html

@@ -208,7 +208,7 @@ <h2>Quick Reference Cheat Sheet</h2>
 
 <div class="whats-next">
     <h2>What Comes Next</h2>
-    <p>Continue to <a class="cross-ref" href="../appendix-c-python-for-llm/index.html">Appendix C: Python for LLM Practitioners</a> for the next reference appendix in this collection.</p>
+    <p>Continue to <a class="cross-ref" href="../appendix-c-python-for-llm/index.html">Appendix C: Python Libraries and Patterns for LLM Development</a> for the next reference appendix in this collection.</p>
 </div>
 
 <section class="bibliography">
@@ -246,7 +246,7 @@ <h2>What Comes Next</h2>
 <nav class="chapter-nav">
     <a class="prev" href="section-b.3.html">B.3 Overfitting, Regularization, and Validation</a>
     <a class="up" href="index.html">Machine Learning Essentials</a>
-    <a class="next" href="../appendix-c-python-for-llm/index.html">Python for LLM Practitioners</a>
+    <a class="next" href="../appendix-c-python-for-llm/index.html">Python Libraries and Patterns for LLM Development</a>
 </nav>
     <footer>
         <p class="footer-title">Building Conversational AI with LLMs and Agents, Fifth Edition</p>

appendices/appendix-c-python-for-llm/index.html

@@ -34,7 +34,7 @@ <h1>Python Libraries and Patterns for LLM Development</h1>
         <p>This appendix serves readers who have Python experience from other domains (web development, data science, scripting) but have not yet worked in the deep learning or LLM space. It also serves as a cheat sheet for experienced practitioners who want a condensed reference.</p>
     </div>
 
-    <p>The libraries covered here are used throughout the book, with the heaviest usage in <a class="cross-ref" href="../../part-3-working-with-llms/module-10-llm-apis/index.html">Chapter 10 (LLM APIs)</a> and <a class="cross-ref" href="../../part-3-working-with-llms/module-11-prompt-engineering/index.html">Chapter 11 (Prompt Engineering)</a>. Fine-tuning workflows in <a class="cross-ref" href="../../part-4-training-adapting/module-14-fine-tuning-fundamentals/index.html">Chapter 14</a> rely on the environment and dependency patterns introduced here. For the HuggingFace-specific layer on top of these foundations, see <a class="cross-ref" href="../appendix-k-huggingface-ecosystem/index.html">Appendix K (HuggingFace Ecosystem)</a>.</p>
+    <p>The libraries covered here are used throughout the book, with the heaviest usage in <a class="cross-ref" href="../../part-3-working-with-llms/module-10-llm-apis/index.html">Chapter 10 (LLM APIs)</a> and <a class="cross-ref" href="../../part-3-working-with-llms/module-11-prompt-engineering/index.html">Chapter 11 (Prompt Engineering)</a>. Fine-tuning workflows in <a class="cross-ref" href="../../part-4-training-adapting/module-14-fine-tuning-fundamentals/index.html">Chapter 14</a> rely on the environment and dependency patterns introduced here. For the HuggingFace-specific layer on top of these foundations, see <a class="cross-ref" href="../appendix-k-huggingface-ecosystem/index.html">Appendix K (HuggingFace: Transformers, Datasets, and Hub)</a>.</p>
 
     <div class="callout note">
         <div class="callout-title">Prerequisites</div>

appendices/appendix-c-python-for-llm/section-c.4.html

@@ -148,13 +148,13 @@ <h2>Python Toolkit Summary</h2>
 
 <div class="whats-next">
     <h2>What Comes Next</h2>
-    <p>Continue to <a class="cross-ref" href="../appendix-d-environment-setup/index.html">Appendix D: Environment Setup Guide</a> for the next reference appendix in this collection.</p>
+    <p>Continue to <a class="cross-ref" href="../appendix-d-environment-setup/index.html">Appendix D: Development Environment Setup</a> for the next reference appendix in this collection.</p>
 </div>
 
 <nav class="chapter-nav">
     <a class="prev" href="section-c.3.html">C.3 Jupyter Notebooks and Google Colab</a>
     <a class="up" href="index.html">Python Libraries and Patterns for LLM Development</a>
-    <a class="next" href="../appendix-d-environment-setup/index.html">Environment Setup Guide</a>
+    <a class="next" href="../appendix-d-environment-setup/index.html">Development Environment Setup</a>
 </nav>
 
     <footer>

appendices/appendix-d-environment-setup/index.html

@@ -34,7 +34,7 @@ <h1>Development Environment Setup</h1>
         <p>This appendix is essential for readers setting up a new machine or cloud instance. It is also useful for debugging mysterious failures in code that should work. Experienced ML engineers who already have a functional environment can skip to Section D.6 to verify their setup meets the requirements for this course.</p>
     </div>
 
-    <p>Once your environment is configured, the Python libraries it hosts are covered in <a class="cross-ref" href="../appendix-c-python-for-llm/index.html">Appendix C (Python for LLM Practitioners)</a>. Hardware selection decisions are informed by <a class="cross-ref" href="../appendix-g-hardware-compute/index.html">Appendix G (Hardware and Compute Reference)</a>, which covers GPU specs and cloud pricing. Fine-tuning workflows that have specific environment requirements are in <a class="cross-ref" href="../../part-4-training-adapting/module-14-fine-tuning-fundamentals/index.html">Chapter 14</a> and <a class="cross-ref" href="../../part-4-training-adapting/module-15-peft/index.html">Chapter 15</a>.</p>
+    <p>Once your environment is configured, the Python libraries it hosts are covered in <a class="cross-ref" href="../appendix-c-python-for-llm/index.html">Appendix C (Python Libraries and Patterns for LLM Development)</a>. Hardware selection decisions are informed by <a class="cross-ref" href="../appendix-g-hardware-compute/index.html">Appendix G (GPU Hardware and Cloud Compute)</a>, which covers GPU specs and cloud pricing. Fine-tuning workflows that have specific environment requirements are in <a class="cross-ref" href="../../part-4-training-adapting/module-14-fine-tuning-fundamentals/index.html">Chapter 14</a> and <a class="cross-ref" href="../../part-4-training-adapting/module-15-peft/index.html">Chapter 15</a>.</p>
 
     <div class="callout note">
         <div class="callout-title">Prerequisites</div>

appendices/appendix-d-environment-setup/section-d.6.html

@@ -139,13 +139,13 @@ <h2>Setup Checklist</h2>
 
 <div class="whats-next">
     <h2>What Comes Next</h2>
-    <p>Continue to <a class="cross-ref" href="../appendix-e-git-collaboration/index.html">Appendix E: Git and Collaboration for ML Projects</a> for the next reference appendix in this collection.</p>
+    <p>Continue to <a class="cross-ref" href="../appendix-e-git-collaboration/index.html">Appendix E: Git, DVC, and Reproducibility</a> for the next reference appendix in this collection.</p>
 </div>
 
 <nav class="chapter-nav">
     <a class="prev" href="section-d.5.html">D.5 Cloud Options</a>
     <a class="up" href="index.html">Development Environment Setup</a>
-    <a class="next" href="../appendix-e-git-collaboration/index.html">Git and Collaboration for ML Projects</a>
+    <a class="next" href="../appendix-e-git-collaboration/index.html">Git, DVC, and Reproducibility</a>
 </nav>
 
     <footer>

appendices/appendix-e-git-collaboration/section-e.4.html

@@ -79,13 +79,13 @@ <h2>Collaboration Toolkit Summary</h2>
 
 <div class="whats-next">
     <h2>What Comes Next</h2>
-    <p>Continue to <a class="cross-ref" href="../appendix-f-glossary/index.html">Appendix F: Glossary of Key Terms</a> for the next reference appendix in this collection.</p>
+    <p>Continue to <a class="cross-ref" href="../appendix-f-glossary/index.html">Appendix F: Glossary</a> for the next reference appendix in this collection.</p>
 </div>
 
 <nav class="chapter-nav">
     <a class="prev" href="section-e.3.html">E.3 Experiment Tracking</a>
     <a class="up" href="index.html">Git, DVC, and Reproducibility</a>
-    <a class="next" href="../appendix-f-glossary/index.html">Glossary of Key Terms</a>
+    <a class="next" href="../appendix-f-glossary/index.html">Glossary</a>
 </nav>
 
     <footer>

appendices/appendix-f-glossary/section-f.4.html

@@ -90,7 +90,7 @@ <h1>F.4 NLP &amp; AI Concepts</h1>
 <div class="glossary-entry" id="gl-flops">
     <dt class="glossary-term">FLOPS (Floating-Point Operations Per Second)</dt>
     <dd class="glossary-def">A measure of computational throughput, typically quoted for GPUs at different precisions (FP32, FP16, BF16, INT8). FLOPS is the key metric for estimating training time, comparing hardware, and calculating the compute budget for scaling law predictions.</dd>
-    <dd class="glossary-xref">See <a class="cross-ref" href="../appendix-g-hardware-compute/index.html">Appendix G</a> (Hardware and Compute Reference)</dd>
+    <dd class="glossary-xref">See <a class="cross-ref" href="../appendix-g-hardware-compute/index.html">Appendix G</a> (GPU Hardware and Cloud Compute)</dd>
 </div>
 
 <div class="glossary-entry" id="gl-grounding">

appendices/appendix-f-glossary/section-f.5.html

@@ -92,13 +92,13 @@ <h1>F.5 Applications &amp; Deployment</h1>
 
 <div class="whats-next">
     <h2>What Comes Next</h2>
-    <p>Continue to <a class="cross-ref" href="../appendix-g-hardware-compute/index.html">Appendix G: Hardware and Compute Reference</a> for the next reference appendix in this collection.</p>
+    <p>Continue to <a class="cross-ref" href="../appendix-g-hardware-compute/index.html">Appendix G: GPU Hardware and Cloud Compute</a> for the next reference appendix in this collection.</p>
 </div>
 
 <nav class="chapter-nav">
     <a class="prev" href="section-f.4.html">F.4 NLP &amp; AI Concepts</a>
     <a class="up" href="index.html">Glossary</a>
-    <a class="next" href="../appendix-g-hardware-compute/index.html">Hardware and Compute Reference</a>
+    <a class="next" href="../appendix-g-hardware-compute/index.html">GPU Hardware and Cloud Compute</a>
 </nav>
     <footer>
         <p class="footer-title">Building Conversational AI with LLMs and Agents, Fifth Edition</p>

appendices/appendix-g-hardware-compute/section-g.5.html

@@ -80,7 +80,7 @@ <h1>Quick Reference: Common Configurations</h1>
 <nav class="chapter-nav">
     <a class="prev" href="section-g.4.html">Cost Estimation Formulas</a>
     <a href="index.html" class="up">Appendix G</a>
-    <a class="next" href="../appendix-h-model-cards/index.html">Model Card Quick Reference</a>
+    <a class="next" href="../appendix-h-model-cards/index.html">Model Cards and Selection Guide</a>
 </nav>
 
     <footer>