User feedback revealed a fundamental design issue: the memory model was
accumulating contradictory "Prefere X" facts because a single choice was
being treated as a permanent preference. Result: 3 different
"Prefere suite X" entries coexisting, all at 90% confidence, with
reservation patterns over time (2hrs, 4hrs, pernoite) all claiming to be
the customer's "preferred" duration.
Corrections:
1. ExtractionService prompt — preferencia now requires EXPLICIT
declaration words ("prefiro", "gosto mais de", "sempre escolho",
"adoro", "favorita"). A mere choice in one conversation is NO LONGER
extracted as preferencia — instead it goes to padrao_comportamental
WITH THE DATE in the content (e.g. "Reservou Alexa para pernoite em
23/05/2026"). This makes memory temporal and auditable instead of
imposing fake consistency.
2. Reference date is passed to the LLM prompt via the latest message
timestamp, used as the anchor date the LLM must embed in every
padrao_comportamental content.
3. ContradictionCheckerService — dual threshold:
- cosine < 0.15 → auto-supersede without LLM (pure duplicate)
- 0.15 to 0.6 → ask LLM if contradicts, supersede if yes
- > 0.6 → ignore, unrelated facts
Previously only the middle band existed, so near-duplicate facts like
two "aniversário 23/05" entries or three "prefere suite X" entries
were never cleaned up.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
