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- knowledge.py: classify trades by maturity before building synthesis prompt; only mature trades (≥35% elapsed) contribute to P&L stats and conclusions; immature trades listed for transparency only - Add 6h staleness gate on POST /synthesize (force=true to override) - System prompt now includes hard timing rule: GPT-4o must not revise existing conclusions because of newly-added immature trades - useApi.ts: useSynthesizeKnowledge accepts force boolean param - SuperContexte.tsx: shows amber notice with age when skipped + offers "Force quand même" button; success banner uses new response shape Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>