# Session Closeout: Trading Agent Audit Sweep (2026-04-30)
## Summary
Continued an 8-agent parallel audit of the trading agent codebase, implementing all findings across 3 commits. Then ran a 3-reviewer gap analysis that found 10 additional issues (4 critical), fixed those, and finally addressed 4 deferred items. Final state: 200 tests passing, +562/-171 lines across 10 files.
## What Changed
### Commit 1: 8-Agent Audit Implementation (401597f)
**Risk engine (engine/risk.py):**
– Re-enabled max_open_positions check (was disabled for paper eval)
– Added batch concentration tracking to prevent same-ticker cap bypass across signals in one run
– Added peak-equity drawdown breaker using trailing_stop_pct (8%)
– Circuit breaker now allows sells for position liquidation
– Block non-asset placeholder tickers (MARKET, CASH, etc.)
**Executor (engine/executor.py):**
– Strategy override for sells: executor looks up original buy strategy from trade history
– Self-heal retry for “insufficient qty” sell errors (max 1 retry)
– _retry_count guard prevents infinite loops
**Strategy tracker (engine/strategy_tracker.py):**
– Fixed sell accounting: subtract cost_basis (not sell_price) from invested
– Fixed sync_unrealized: no longer overwrites invested with market_value
– Added cross-strategy FIFO fallback in rebuild_from_trades
– Added check_integrity() for negative-balance warnings
– Added get_all_trades() to collector/db.py for full rebuilds
**Shell scripts:**
– Fixed run.sh .env parser (preserve spaces in values)
– Fixed run.sh shell injection (pipe LLM text via stdin instead of string interpolation)
– Fixed report.sh tautological no-trades guard
– Added strategy annotation to portfolio display in prompt
**Tests:** 18 new tests covering NON_ASSET_TICKERS, batch concentration, drawdown breaker, self-heal retry, strategy override for sells.
### Commit 2: 3-Reviewer Gap Analysis (0c5ff5a)
Ran 3 parallel reviewer agents (risk, executor/tracker, shell/prompts) that identified 10 gaps:
**Critical fixes:**
– Position cap early return bypassed cash reserve check. Restructured checks 5-7 to flow sequentially instead of early-returning.
– Peak equity never persisted on new highs (only saved when circuit breaker fired, so it reverted on next call). Now calls _save_state() when equity exceeds stored peak.
– Silent zero P&L when portfolio position missing at sell time. Now logs a warning.
– format_strategy_breakdown used 500-trade limit instead of get_all_trades().
**Medium fixes:**
– .env parser doesn’t strip surrounding quotes (both run.sh and report.sh)
– `<<< "$PROMPT"` expanded `$` in portfolio text. Now uses `< "$PROMPT_FILE"`.
- Zero-price buys silently approved. Now rejected.
- NON_ASSET_TICKERS expanded (NULL, UNKNOWN, BUY, SELL, etc.)
- insert_trade failure after Alpaca fill loses trade record. Now caught with CRITICAL log.
### Commit 3: Deferred Items (e379dbb)
- Strategy override now uses FIFO oldest buy instead of newest
- Extracted shared _replay_fifo() used by both format_strategy_breakdown and rebuild_from_trades (eliminated ~60 lines of duplicated FIFO logic)
- rebuild_from_trades reads initial_equity from config.json instead of hardcoding 100000
- LEVERAGED_ETFS expanded from 28 to 48 tickers (added 2x products like SSO, QLD, UCO, BOIL; missing 3x like DFEN, DPST, NAIL; and volatility products VXX, VIXY)
## Architecture Decisions
- **No early returns in position sizing checks.** Checks 5 (position cap), 6 (max positions), and 7 (cash reserve) now flow sequentially. When check 5 adjusts qty down, it updates the local variable and continues to check 6 and 7 rather than returning immediately. This prevents bypass scenarios where a position-cap-adjusted order exceeds the cash reserve.
- **FIFO oldest buy for strategy attribution.** When selling a position that was bought multiple times under different strategies, the executor now attributes the sell to the oldest buy's strategy (FIFO matching), not the most recent. This aligns with how cost basis is computed.
- **Shared _replay_fifo() function.** Single implementation of the FIFO lot matching with cross-strategy fallback, used by both the daily breakdown report and the full rebuild. Cross-strategy fallback handles cases where the LLM attributed a sell to a different strategy than the original buy.
## Test Coverage
200 tests across 6 files:
- test_risk.py: 56 tests (risk engine, circuit breakers, position caps, batch tracking, drawdown, NON_ASSET_TICKERS)
- test_executor.py: 41 tests (execution paths, self-heal retry, strategy override)
- test_strategy_tracker.py: 58 tests (virtual sub-accounts, trade recording, sync, reporting)
- test_sizing.py: 21 tests (position sizing)
- test_portfolio.py: 7 tests (portfolio snapshot)
- test_formatter.py: 17 tests (output formatting)
## Remaining Known Issues (Low Priority)
- Virtual sub-account rebuild shows negative cash for historical trades (expected: accounts started with $10K subdivisions but real Alpaca account had $40K+; accurate going forward)
- check_integrity() false-positives for trades attributed to renamed/disabled strategies
- sync_unrealized_from_positions uses most recent buy for ticker-to-strategy mapping (same as executor, could use FIFO but low impact)