## Implementation Complete Created SessionHistory tracker to store ALL tickets processed in the current session. ### Files Created - `src/trckr_plow/session.py:1-188` - SessionHistory class implementation - `tests/test_session.py:1-449` - 30 comprehensive unit tests (100% coverage) ### Classes Implemented 1. **ProcessedTicket** - Record of a single processed ticket with: - issue_id, title, status, duration, success, timestamp 2. **SessionSummary** - Summary statistics dataclass with: - completed_count, failed_count, success_rate, total_duration, session_duration 3. **SessionHistory** - Main tracker class with: - add_ticket() - Add unlimited tickets to history - get_summary() - Calculate summary statistics - get_ticket_count() - Get total ticket count - get_recent_tickets(n) - Get N most recent tickets - clear() - Reset history and session start time - JSON serialization (to_dict, to_json, from_dict, from_json) ### Verification - All 30 new tests pass - All 648 project tests pass - Linting passes - 100% code coverage for new module ### Acceptance Criteria Met - [x] Can add unlimited tickets to history - [x] Calculates correct summary statistics - [x] Tracks session duration - [x] Unit tests verify all functionality