This implements Task 5 from the daily P&L results API refactor plan, bringing
together P&L calculation and reasoning summary into the BaseAgent trading session.
Changes:
- Add DailyPnLCalculator and ReasoningSummarizer to BaseAgent.__init__
- Modify run_trading_session() to:
* Calculate P&L at start of day using current market prices
* Create trading_day record with P&L metrics
* Generate reasoning summary after trading using AI model
* Save final holdings to database
* Update trading_day with completion data (cash, portfolio value, summary, actions)
- Add helper methods:
* _get_current_prices() - Get market prices for P&L calculation
* _get_current_portfolio_state() - Read current state from position.jsonl
* _calculate_portfolio_value() - Calculate total portfolio value
Integration test verifies:
- P&L calculation components exist and are importable
- DailyPnLCalculator correctly calculates zero P&L on first day
- ReasoningSummarizer can be instantiated with AI model
This maintains backward compatibility with position.jsonl while adding
comprehensive database tracking for the new results API.
Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>
