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OpenSquared a630cdc708 feat: Find Similar + Merge in Pattern Library

Backend (patterns.py):
- POST /api/patterns/find-similar — GPT-4o-mini compares a library pattern
  against all others; returns merge_as_instance | counter_scenario | new_pattern
- POST /api/patterns/merge — full transactional merge: remaps pattern_id in
  pattern_score_history, trade_entry_prices, ai_reasoning_traces, ai_call_logs,
  skipped_trades; unions historical_instances (dedup); sums backtest counters;
  deletes the discarded pattern

Frontend (PatternExplorer.tsx + useApi.ts):
- ScanSearch button on each non-builtin card triggers find-similar
- Inline result panel: duplicate → merge CTA with confirmation + destructive warning
  counter_scenario → apply regime_tag CTA; new_pattern → green "unique" badge
- useFindSimilarPattern + useMergePatterns hooks invalidate all-patterns on success

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-06-23 12:13:33 +02:00