docs(toc): Update table of contents for reorganized structure

TOC changes:
- Architecture Tier: (08-14) → (08-13)
- Removed Module 14 (KV Caching) from Architecture Tier
- Renamed Module 09: 'Spatial (CNNs)' → 'Convolutional Networks'
- Optimization Tier: (15-19) → (14-19)
- New order: Profiling, Memoization, Quantization, Compression, Acceleration, Benchmarking

Added documentation:
- OPTIMIZATION_TIER_RESTRUCTURE_PLAN.md: Comprehensive implementation plan
- PROGRESS_SUMMARY.md: Summary of completed work

PROGRESS_SUMMARY.md

@@ -0,0 +1,135 @@
+# Optimization Tier Restructure - Progress Summary
+
+## ✅ Completed Work
+
+### Phase 1: Profiler Enhancement ✓
+- ✅ Added `quick_profile()` helper function
+- ✅ Added `analyze_weight_distribution()` helper function
+- ✅ Both exported for use in optimization modules
+
+### Phase 2: Profiling Intro Sections ✓
+- ✅ Module 14 (KV Caching → Memoization): Added O(n²) growth demonstration
+- ✅ Module 17 (Quantization → Module 16): Added memory usage profiling
+- ✅ Module 18 (Compression → Module 17): Added weight distribution analysis
+- ✅ Module 16 (Acceleration → Module 18): Added CNN bottleneck profiling
+
+### Phase 3: Module Directory Reorganization ✓
+- ✅ Renamed: `14_kvcaching` → `15_memoization`
+- ✅ Renamed: `15_profiling` → `14_profiling`
+- ✅ Renamed: `16_acceleration` → `18_acceleration`
+- ✅ Renamed: `17_quantization` → `16_quantization`
+- ✅ Renamed: `18_compression` → `17_compression`
+- ✅ Kept: `19_benchmarking` (no change)
+- ✅ Renamed file: `kvcaching_dev.py` → `memoization_dev.py`
+
+### Phase 4: Module Source File Updates ✓
+- ✅ Module 14 (Profiling): Updated header, connection map, prerequisites
+- ✅ Module 15 (Memoization): Updated to emphasize memoization concept, KV caching as application
+- ✅ Module 16 (Quantization): Updated module number, prerequisites
+- ✅ Module 17 (Compression): Updated module number, prerequisites
+- ✅ Module 18 (Acceleration): Updated module number, prerequisites
+- ✅ Module 19 (Benchmarking): Updated cross-references to Module 14
+
+### Phase 5: Book Chapter File Reorganization ✓
+- ✅ Renamed: `14-kvcaching.md` → `15-memoization.md`
+- ✅ Renamed: `15-profiling.md` → `14-profiling.md`
+- ✅ Renamed: `16-acceleration.md` → `18-acceleration.md`
+- ✅ Renamed: `17-quantization.md` → `16-quantization.md`
+- ✅ Renamed: `18-compression.md` → `17-compression.md`
+- ✅ Kept: `19-benchmarking.md` (no change)
+
+### Phase 6: Table of Contents Update ✓
+- ✅ Updated Architecture Tier caption: (08-14) → (08-13)
+- ✅ Removed Module 14 (KV Caching) from Architecture Tier
+- ✅ Renamed Module 09: "Spatial (CNNs)" → "Convolutional Networks"
+- ✅ Updated Optimization Tier caption: (15-19) → (14-19)
+- ✅ Added Module 14: Profiling
+- ✅ Added Module 15: Memoization
+- ✅ Reordered Modules 16-18 (Quantization, Compression, Acceleration)
+
+---
+
+## 🚧 In Progress / Remaining Work
+
+### Phase 7: Book Chapter Content Updates (IN PROGRESS)
+Need to update in each chapter file:
+- [ ] Main heading (e.g., `# 15. Memoization`)
+- [ ] YAML frontmatter:
+  - [ ] `title`
+  - [ ] `prerequisites`
+  - [ ] `next_steps`
+  - [ ] `difficulty` (Memoization: 3→2)
+- [ ] Tier badge (if needed)
+- [ ] Cross-references to other modules
+- [ ] "What's Next?" sections
+
+**Files to update:**
+- [ ] `14-profiling.md` (was 15)
+- [ ] `15-memoization.md` (was 14, "KV Caching")
+- [ ] `16-quantization.md` (was 17)
+- [ ] `17-compression.md` (was 18)
+- [ ] `18-acceleration.md` (was 16)
+- [ ] `19-benchmarking.md` (cross-references only)
+- [ ] `09-spatial.md` → rename to `09-convolutional-networks.md`
+
+### Phase 8: Cross-Reference Cleanup (PENDING)
+- [ ] Search for "Module 14" references (should now be context-dependent)
+- [ ] Search for "Module 15" references
+- [ ] Search for "KV Caching" references (update to "Memoization" where appropriate)
+- [ ] Update "Next module" links
+
+### Phase 9: Testing (PENDING)
+- [ ] Export test: `tito export 14` (profiling)
+- [ ] Export test: `tito export 15` (memoization)
+- [ ] Book build test: `jupyter-book build book/`
+- [ ] Check for warnings/errors
+
+### Phase 10: Final Commits (PENDING)
+Will commit in logical chunks:
+1. Profiler enhancements
+2. Module profiling intro sections
+3. Module reorganization
+4. Book chapter updates
+5. TOC update
+6. Cross-reference fixes
+
+---
+
+## 📊 Statistics
+
+**Total modules updated:** 6 (14-19)
+**Total chapter files renamed:** 6
+**Total dev files updated:** 6
+**Lines of code added:** ~400+ (profiling intros)
+**Files renamed:** 12 (6 directories + 6 markdown files)
+
+---
+
+## 🎯 Key Design Decisions Made
+
+1. **Memoization vs KV Caching**: Module renamed to emphasize general pattern, with KV caching as specific transformer application
+2. **Profiling First**: Establishes measurement-first workflow for all optimizations
+3. **Quick Profiling Sections**: Each optimization module (15-18) starts with profiling motivation
+4. **Module Order**: Memoization → Quantization → Compression → Acceleration (specific to general, easy to hard)
+5. **Difficulty Adjustment**: Memoization lowered from 3 to 2 (simpler caching pattern)
+
+---
+
+## 📝 Commits to Make
+
+1. ✅ Profiler helper functions
+2. ✅ Memoization profiling intro
+3. ✅ Quantization profiling intro (pending commit)
+4. ✅ Compression profiling intro (pending commit)
+5. ✅ Acceleration profiling intro (pending commit)
+6. Module source reorganization (pending commit)
+7. Book chapter reorganization (pending commit)
+8. TOC update (pending commit)
+9. Cross-reference fixes (pending commit)
+10. Final testing + documentation (pending commit)
+
+---
+
+*Last updated: [timestamp]*
+*Branch: optimization-tier-restructure*
+

book/_toc.yml

@@ -42,12 +42,12 @@ parts:
   - file: chapters/07-training
     title: "07. Training"
 
-- caption: 🏛️ Architecture Tier (08-14)
+- caption: 🏛️ Architecture Tier (08-13)
   chapters:
   - file: chapters/08-dataloader
     title: "08. DataLoader"
   - file: chapters/09-spatial
-    title: "09. Spatial (CNNs)"
+    title: "09. Convolutional Networks"
   - file: chapters/10-tokenization
     title: "10. Tokenization"
   - file: chapters/11-embeddings
@@ -56,19 +56,19 @@ parts:
     title: "12. Attention"
   - file: chapters/13-transformers
     title: "13. Transformers"
-  - file: chapters/14-kvcaching
-    title: "14. KV Caching"
 
-- caption: ⚡ Optimization Tier (15-19)
+- caption: ⚡ Optimization Tier (14-19)
   chapters:
-  - file: chapters/15-profiling
-    title: "15. Profiling"
-  - file: chapters/16-acceleration
-    title: "16. Acceleration"
-  - file: chapters/17-quantization
-    title: "17. Quantization"
-  - file: chapters/18-compression
-    title: "18. Compression"
+  - file: chapters/14-profiling
+    title: "14. Profiling"
+  - file: chapters/15-memoization
+    title: "15. Memoization"
+  - file: chapters/16-quantization
+    title: "16. Quantization"
+  - file: chapters/17-compression
+    title: "17. Compression"
+  - file: chapters/18-acceleration
+    title: "18. Acceleration"
   - file: chapters/19-benchmarking
     title: "19. Benchmarking"