docs: Add work log for OpenRouter model addition

WORK_LOG.md

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+# Work Log - OpenRouter Model Addition
+
+## Date
+2026-02-08
+
+## Task
+Add top 10 OpenRouter models to TradingAgents CLI model selection
+
+## Changes Made
+
+### 1. Modified Files
+- **cli/utils.py**: Added OpenRouter top 10 models to both shallow and deep thinking agent options
+- **tests/test_cli_utils.py**: Created comprehensive test suite for CLI utilities
+
+### 2. New Files
+- **tests/__init__.py**: Package initialization
+- **tests/test_cli_utils.py**: Test coverage for OpenRouter model configuration
+
+### 3. Model Additions (Top 10 from OpenRouter.ai Rankings)
+Added the following models to both SHALLOW_AGENT_OPTIONS and DEEP_AGENT_OPTIONS:
+
+1. **Kimi K2.5 0127** (#1 ranked) - `moonshotai/kimi-k2.5-0127`
+2. **Claude Opus 4.5** - `anthropic/claude-4.5-opus-20251124`
+3. **Claude Sonnet 4.5** - `anthropic/claude-4.5-sonnet-20250929`
+4. **Gemini 3 Flash Preview** - `google/gemini-3-flash-preview-20251217`
+5. **Gemini 2.5 Flash** - `google/gemini-2.5-flash`
+6. **Gemini 2.5 Flash Lite** - `google/gemini-2.5-flash-lite`
+7. **Deepseek V3.2** - `deepseek/deepseek-v3.2-20251201`
+8. **Grok 4.1 Fast** - `x-ai/grok-4.1-fast`
+9. **Grok Code Fast 1** - `x-ai/grok-code-fast-1`
+10. **Minimax M2.1** - `minimax/minimax-m2.1`
+
+Plus preserved existing free models:
+- NVIDIA Nemotron 3 Nano 30B (free) - `nvidia/nemotron-3-nano-30b-a3b:free`
+- Z.AI GLM 4.5 Air (free) - `z-ai/glm-4.5-air:free`
+
+### 4. Refactoring
+- Moved `SHALLOW_AGENT_OPTIONS` and `DEEP_AGENT_OPTIONS` from function-local scope to module-level constants
+- This enables better testability and reusability
+
+### 5. Test Coverage
+Created comprehensive tests covering:
+- Model count verification (12+ models)
+- Model format validation (provider/model structure)
+- Top models inclusion check
+- Free model preservation
+- Duplicate detection
+- Cross-list consistency
+- All providers have model entries
+
+## Git Workflow
+1. Created branch: `feature/add-openrouter-top-models`
+2. Committed changes: `f35feaf`
+3. Pushed to fork: https://github.com/treasuraid/TradingAgents
+4. Created PR: https://github.com/TauricResearch/TradingAgents/pull/340
+
+## PR Details
+- **Title**: feat: Add top 10 OpenRouter models to CLI model selection
+- **Branch**: feature/add-openrouter-top-models
+- **Target**: TauricResearch/TradingAgents main
+
+## Notes
+- Total files changed: 3
+- Insertions: +285 lines
+- Deletions: -90 lines
+- Backward compatible: Yes
+- All existing free models preserved