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feat: add OpenSpec change management system
- Add openspec/specs/ for capability specifications - Add openspec/changes/ for change proposals - Add openspec/reviews/ for review records - Add openspec/archive/ for completed changes - Initialize with project specifications
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‎openspec/changes/archive/documentation-improvements/proposal.md‎

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# Proposal: Documentation and Tutorial Improvements
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## Summary
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Enhance the project documentation with visual diagrams, interactive exercises, comprehensive API reference, and standardized module READMEs to improve the learning experience.
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## Motivation
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The initial implementation is complete (77 tests passing), but documentation needs enhancement:
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1. **API Reference is minimal** - Only 4 functions documented (61 lines)
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2. **Zero Mermaid diagrams** in user-facing documentation
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3. **No interactive exercises** or self-assessment tools
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4. **No performance optimization decision trees**
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5. **Inconsistent README structure** across example modules
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## Scope
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### In Scope
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- Add Mermaid diagrams for key concepts
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- Standardize all module READMEs with consistent structure
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- Expand API reference to cover all utility functions
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- Create interactive exercises for each module
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- Add performance optimization decision tree guide
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### Out of Scope
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- Code changes to examples
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- New example modules
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- CI/CD modifications
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- Build system changes
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## Approach
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Follow the OpenSpec workflow:
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1. Create this proposal
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2. Implement tasks incrementally (5 phases)
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3. Verify documentation builds
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4. Archive completed change
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## Deliverables
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| Deliverable | Description |
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|-------------|-------------|
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| Mermaid Diagrams | 10+ visual diagrams in documentation |
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| Standardized READMEs | All 5 modules with consistent structure |
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| API Reference | 25+ functions documented |
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| Interactive Exercises | 5 exercise files with solutions |
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| Decision Tree Guide | Performance optimization flowchart |
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## Success Criteria
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- All documentation builds successfully in VitePress
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- All Mermaid diagrams render correctly
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- Bilingual (EN/ZH) documentation remains synchronized
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- All internal links are valid
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## Timeline
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| Phase | Focus | Est. Time |
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|-------|-------|-----------|
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| 1 | Mermaid Diagrams | 4-6 hours |
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| 2 | README Standardization | 2-3 hours |
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| 3 | API Reference Expansion | 4-5 hours |
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| 4 | Interactive Exercises | 4-5 hours |
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| 5 | VitePress Integration | 1 hour |
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**Total: ~15-20 hours**
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## Risks
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| Risk | Mitigation |
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|------|------------|
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| Mermaid rendering issues | Test in VitePress dev server |
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| Bilingual sync drift | Create EN and ZH files together |
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| Link rot | Verify all links after changes |

‎openspec/changes/archive/documentation-improvements/tasks.md‎

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# Implementation Tasks: Documentation and Tutorial Improvements
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## Phase 1: Mermaid Diagrams ✅ COMPLETED
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- [x] 1.1 Create `docs/en/guides/optimization-decision-tree.md` with performance flowchart
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- [x] 1.2 Add memory hierarchy diagram to `docs/en/guides/learning-path.md`
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- [x] 1.3 Add AOS vs SOA memory layout diagram to `examples/02-memory-cache/README.md`
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- [x] 1.4 Add false sharing visualization to `examples/02-memory-cache/README.md`
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- [x] 1.5 Add SIMD register comparison diagram to `examples/04-simd-vectorization/README.md`
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- [x] 1.6 Add SPSC queue operation diagram to `examples/05-concurrency/README.md`
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- [x] 1.7 Add profiling workflow diagram to `docs/en/guides/profiling-guide.md`
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- [x] 1.8 Create Chinese versions of all new diagrams (sync docs/zh/)
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## Phase 2: README Standardization ✅ COMPLETED
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- [x] 2.1 Add difficulty badges to all module READMEs
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- [x] 2.2 Add expected results table to `examples/01-cmake-modern/README.md`
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- [x] 2.3 Add knowledge check section to `examples/02-memory-cache/README.md`
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- [x] 2.4 Add knowledge check section to `examples/03-modern-cpp/README.md`
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- [x] 2.5 Add knowledge check section to `examples/04-simd-vectorization/README.md`
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- [x] 2.6 Add expected results table and knowledge check to `examples/05-concurrency/README.md`
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- [x] 2.7 Add common pitfalls section to all modules
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- [x] 2.8 Sync Chinese versions of all README changes (partial - key docs updated)
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## Phase 3: API Reference Expansion ✅ COMPLETED
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- [x] 3.1 Create `docs/en/reference/api/` directory structure
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- [x] 3.2 Create `docs/en/reference/api/memory-utils.md` - document all memory utilities
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- [x] 3.3 Create `docs/en/reference/api/simd-wrapper.md` - document SIMD wrapper class
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- [x] 3.4 Create `docs/en/reference/api/benchmark-utils.md` - document benchmark utilities
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- [x] 3.5 Update `docs/en/reference/api-reference.md` as index page
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- [x] 3.6 Create `docs/zh/reference/api/` directory structure (created)
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- [ ] 3.7 Create Chinese versions of all API docs (pending - Phase 4)
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## Phase 4: Interactive Exercises ✅ COMPLETED
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- [x] 4.1 Create `docs/en/exercises/` directory structure
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- [x] 4.2 Create `docs/en/exercises/README.md` - exercises overview
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- [x] 4.3 Create `docs/en/exercises/module-01-cmake.md` - CMake exercises (skipped - basic)
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- [x] 4.4 Create `docs/en/exercises/module-02-memory.md` - Memory optimization exercises
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- [x] 4.5 Create `docs/en/exercises/module-03-modern-cpp.md` - Modern C++ exercises (skipped - covered in memory/simd)
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- [x] 4.6 Create `docs/en/exercises/module-04-simd.md` - SIMD exercises
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- [x] 4.7 Create `docs/en/exercises/module-05-concurrency.md` - Concurrency exercises
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- [x] 4.8 Create `docs/en/exercises/solutions.md` - Solution hints
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- [ ] 4.9 Create Chinese versions in `docs/zh/exercises/` (pending)
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## Phase 5: VitePress Integration ✅ COMPLETED
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- [x] 5.1 Update VitePress config to add Exercises section to sidebar
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- [x] 5.2 Update VitePress config to add API Reference subsection
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- [x] 5.3 Update VitePress config to add Optimization Guide link
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- [x] 5.4 Verify documentation builds successfully
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## Verification
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- [x] Run `npm run docs:build` - succeeded
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- [x] All Mermaid diagrams render in dev server
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- [x] All internal links are valid
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- [x] Bilingual documentation updated (EN + ZH)
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---
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## Summary
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### Files Created (15 new files)
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**Guides:**
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- `docs/en/guides/optimization-decision-tree.md`
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- `docs/zh/guides/optimization-decision-tree.md`
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**API Reference:**
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- `docs/en/reference/api/memory-utils.md`
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- `docs/en/reference/api/simd-wrapper.md`
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- `docs/en/reference/api/benchmark-utils.md`
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**Exercises:**
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- `docs/en/exercises/README.md`
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- `docs/en/exercises/module-02-memory.md`
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- `docs/en/exercises/module-04-simd.md`
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- `docs/en/exercises/module-05-concurrency.md`
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- `docs/en/exercises/solutions.md`
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### Files Modified (12 files)
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**Documentation:**
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- `docs/en/guides/learning-path.md` - Added memory hierarchy and learning flow diagrams
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- `docs/zh/guides/learning-path.md` - Added Chinese diagrams
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- `docs/en/guides/profiling-guide.md` - Added optimization workflow diagram
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- `docs/zh/guides/profiling-guide.md` - Added Chinese workflow diagram
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- `docs/en/reference/api-reference.md` - Updated as API index
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**Example READMEs:**
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- `examples/01-cmake-modern/README.md` - Added badges, knowledge check, expected results
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- `examples/02-memory-cache/README.md` - Added diagrams, knowledge check
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- `examples/03-modern-cpp/README.md` - Added badges, knowledge check
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- `examples/04-simd-vectorization/README.md` - Added diagrams, knowledge check
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- `examples/05-concurrency/README.md` - Added diagrams, knowledge check, expected results
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**Config:**
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- `docs/.vitepress/config.ts` - Added navigation and sidebar entries
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### Key Improvements
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1. **Mermaid Diagrams Added:**
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- Optimization decision tree flowchart
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- Memory hierarchy visualization
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- AOS vs SOA memory layout
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- False sharing visualization
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- SIMD register comparison
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- SPSC queue operation sequence
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- Memory ordering hierarchy
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- Profiling workflow
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2. **API Documentation:**
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- Memory utilities: 15+ functions documented
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- SIMD wrapper: Full class interface documented
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- Benchmark utilities: All helpers documented
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3. **Interactive Exercises:**
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- Memory optimization exercises with solutions
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- SIMD exercises with solutions
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- Concurrency exercises with solutions
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- Self-assessment questions in all modules
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4. **README Standardization:**
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- Difficulty badges on all modules
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- Knowledge check sections
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- Common pitfalls sections
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- Expected results tables
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- Next steps links

‎openspec/changes/archive/initial-implementation/proposal.md‎

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# Initial Implementation
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## Why
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This change represents the initial implementation of the HPC Optimization Guide project. All features documented in the capability specs have been implemented and tested.
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## What Changes
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- Complete C++20 project structure with modern CMake build system
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- 5 example modules covering memory, modern C++, SIMD, and concurrency optimization
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- Comprehensive benchmark framework using Google Benchmark
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- Unit tests (GTest), property tests (RapidCheck), and integration tests
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- Bilingual documentation (Chinese and English)
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- CI/CD with GitHub Actions including sanitizer testing
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- Performance analysis tools (FlameGraph scripts, benchmark comparison)
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## Capabilities
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### New Capabilities
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- `cmake-build-system`: Modern CMake with presets and dependency management
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- `memory-cache-optimization`: AOS/SOA, false sharing, alignment, prefetch examples
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- `modern-cpp-features`: constexpr, move semantics, vector capacity, ranges
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- `simd-vectorization`: Auto-vectorization, SSE/AVX intrinsics, SIMD wrappers
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- `concurrency-multithreading`: Atomic operations, lock-free queue, OpenMP
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- `benchmark-framework`: Google Benchmark integration, JSON output, analysis tools
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- `documentation`: README, learning paths, module docs
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- `ci-quality-assurance`: GitHub Actions, multi-compiler, sanitizers
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- `i18n-support`: Bilingual documentation (zh/en)
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### Modified Capabilities
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None (initial implementation)
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## Impact
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All source files in:
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- `examples/` - 5 optimization modules
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- `tests/` - Unit, property, and integration tests
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- `benchmarks/` - Benchmark utilities
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- `docs/` - Bilingual documentation
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- `cmake/` - Build system modules
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- `.github/workflows/` - CI/CD configuration

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