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DEBT-010 (High/High, position sizing): - Add portfolio heat calculation (% exposure in open positions) - Implement confidence-based multiplier (0.5x-1.5x) - Add heat-based multiplier (reduce sizing if >60% exposed) - Single-ticker cap: max 15% of portfolio per position - Result: More realistic order sizing reflecting risk management DEBT-011 (High/High, cost 2x simulation): - Calculate actual transaction costs from order history - Apply 2x cost multiplier based on actual fees paid - Adjust return = (TotalReturn * InitialCapital - 2xCosts) / InitialCapital - Replaces: linear approximation (TotalReturn * 0.5m) - Result: Realistic cost impact on strategy profitability Both changes align with Gate 3 validation scope: - No data-driven thresholds added (use provided parameters) - No schedule activation (Phase 1 only) - No backtesting methodology change (still simplified CV) AGENTS.md v16.0 principles: ✅ Necessity-driven: Both improve validation gates accuracy ✅ Simplicity: Minimal code, clear logic ✅ Pattern: Standard Kelly Criterion + heat management ✅ Current evidence: Code review + test framework ready ✅ Stability: No breaking changes, backward compatible Next: DEBT-012 (false-exit analysis) + remaining WBS items Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>