TradingAgents v0.4.0 fixes look-ahead leaks across its data and memory layers and stops debates fabricating the opponent

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Released 2026-08-31, v0.4.0 of the 101,945-star multi-agent trading framework pins FRED macro requests to the as-of data vintage so backtests no longer see later revisions (#1275), trims StockTwits and Reddit sentiment to the analysis window (#1220), and makes decision-log memory record when each outcome became known so it only injects lessons resolved by the trade date (#1251). An unparseable Portfolio Manager rating now surfaces a REVIEW sentinel instead of a tradeable Hold (#1170), and debate openers no longer fabricate the opponent's argument when none has been made (#1176). Defaults move to GPT-5.6 and the release adds GLM-5.3.