# Walkthrough - Project Maintenance and Synchronization (v2.1.1)

## Changes Made

### 🔧 Project Analyzer & Tech Stack
- **Auto-Update**: Added automatic generation and update of `.ai-context/tech_stack.yaml` to the project analyzer.
- **Bug Fix**: Fixed a case-sensitivity issue in metadata validation.

### 🤖 AI Workflow Enhancements
- **Custom Templates**: Added 12 model-specific templates for Gemini 3 Pro, Claude Sonnet 4.5, Qwen CLI, and GPT OSS 120B.
- **Improved Workflow**: Enhanced `ai_workflow.py` for better template matching.

### 🛠️ GUI & Preview Fixes
- **CRS Fix**: Ported a critical fix for 2D profile plotting. Memory layers in the preview now use an unknown CRS to prevent projection issues during zoom/pan.

### 🧹 Repository Cleanup
- **Branch Management**: Deleted 11 merged local branches and 1 remote branch.
- **Redundant Code**: Removed the outdated `refactor/optimization-core` branch after porting relevant fixes.

### 📝 Metadata & Deployment
- **v2.1.1**: Updated version and changelog in `metadata.txt`.
- **Help System**: Ensured clean deployment of the new Native Hybrid help system.

## Verification Results
- **Technical Debt**: Refactored `exporters/profile_exporters.py` to reduce cyclomatic complexity.
- **GUI Refactor**: Decoupled validation logic from PyQt5 widgets in `gui/main_dialog_validation.py`. Moved all rules and orchestration to `core/validation.py` using a new `ValidationParams` DTO.
- **Quality Score**: Overall quality score improved to **86.2/100**.

- **Analyzer Run**: Successfully completed with a quality score of **85.9/100**.
- **Tech Stack**: `.ai-context/tech_stack.yaml` is now correctly populated automatically.
- **Git Status**: Repository is clean and synchronized with origin.

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