# Documentation Update for Issue #6: Trade Model (DB-5)

## Overview
Updated project documentation to reflect the implementation of the Trade model with Capital Gains Tax (CGT) tracking support for Australian tax compliance.

## Files Updated

### 1. CHANGELOG.md
**Location**: `/Users/andrewkaszubski/Dev/Spektiv/CHANGELOG.md`

Added comprehensive entry under `## [Unreleased] ### Added` section documenting:
- Trade model with BUY/SELL sides and execution status tracking
- TradeSide, TradeStatus, TradeOrderType enums
- Capital Gains Tax (CGT) support for Australian tax compliance
- 50% CGT discount eligibility for holdings >12 months
- Australian financial year (FY) calculation (July-June)
- Multi-currency support with FX rate to AUD conversion
- Database migration 005_add_trade_model.py
- Comprehensive unit test suite (65 tests, 2054 lines)
- Integration test suite (22 tests, 1235 lines)
- Total: 87 tests added

**Format**: Keep a Changelog format with file:line references for code locations
**Cross-references**: All 14 bullet points include proper file paths and line number ranges

### 2. PROJECT.md
**Location**: `/Users/andrewkaszubski/Dev/Spektiv/PROJECT.md`

Updated issue tracking section to mark Phase 1 Database issues as completed:
- [x] #2 Database setup - SQLAlchemy + PostgreSQL/SQLite
- [x] #3 User model - profiles, tax jurisdiction
- [x] #4 Portfolio model - live, paper, backtest
- [x] #5 Settings model - risk profiles, alerts
- [x] #6 Trade model - CGT tracking
- [ ] #7 Alembic migrations (still pending)

**Section**: Active Work → Phase 1: Database (Issues #2-7)

## Validation Checklist

### File Existence Verification
- [x] `/Users/andrewkaszubski/Dev/Spektiv/spektiv/api/models/trade.py` - 20.9 KB
- [x] `/Users/andrewkaszubski/Dev/Spektiv/migrations/versions/005_add_trade_model.py` - 11.2 KB
- [x] `/Users/andrewkaszubski/Dev/Spektiv/tests/unit/api/test_trade_model.py` - 75.7 KB (65 test functions)
- [x] `/Users/andrewkaszubski/Dev/Spektiv/tests/integration/api/test_trade_integration.py` - 47.0 KB (22 test functions)

### Code Cross-references
- [x] Trade model exports verified in `spektiv/api/models/__init__.py`
  - Trade, TradeSide, TradeStatus, TradeOrderType all exported
- [x] Portfolio model trades relationship verified at line 202-205
  - Correct cascade delete configuration
  - Proper back_populates reference

### Line Number Validation
- [x] CHANGELOG.md file:line references match actual code locations
  - Line 86: TradeSide enum definition
  - Line 201-305: CGT field definitions
  - Line 306-325: Currency field definitions
  - Line 418-441: tax_year property
  - Line 443-475: Property methods
  - Line 477-585: Validators
  - Line 596-665: Event listener validation

### Test Count Verification
- [x] Unit tests: 65 confirmed (grep "def test_" count)
- [x] Integration tests: 22 confirmed
- [x] Total: 87 tests (65 + 22)

## SCOPE & ARCHITECTURE Alignment

### SCOPE Section (No changes needed)
PROJECT.md already includes:
- "Australian CGT calculations" with 50% discount for >12 month holdings
- "Portfolio tracking with mark-to-market valuation"
- "User database for profiles, portfolios, settings"

The Trade model directly supports these in-scope requirements.

### ARCHITECTURE Section (No changes needed)
PROJECT.md directory structure already lists:
```
database/
  models/
    └── trade.py  (✓ Implemented)
```

Trade model fully implements the portfolio layer as documented.

## Documentation Standards Compliance

- **Format**: Follows Keep a Changelog conventions
- **Cross-references**: All file paths are absolute paths starting with `spektiv/` or `tests/`
- **Line numbers**: Specific line ranges provided for code locations
- **Test documentation**: Includes test file locations with test counts
- **Migration documentation**: References migration file with version number (005)

## Summary

Documentation successfully updated to reflect the Trade model implementation for Issue #6. All required documentation files have been modified with:

1. Comprehensive CHANGELOG entry (34 lines) with 14 feature points
2. PROJECT.md issue tracking update marking #6 as completed
3. All file paths and line numbers validated
4. Cross-references verified against actual code

No additional documentation was needed as:
- SCOPE section already covers CGT requirements
- ARCHITECTURE section already lists trade.py
- API documentation will be auto-generated from docstrings
- Test documentation integrated into CHANGELOG

Total documentation: 2 files updated, 0 files created, all validations passed.