Expert knows the full eras2_production schema cold: - All PKs, FKs, column names verified from DESCRIBE - Junction tables: objektkunde (kunden↔objekte), objektadressen, kundenadressen - Exact JOIN patterns baked into prompt - No DESCRIBE/SHOW at runtime — plan once, execute - Domain language responses (not SQL dumps) Simplified ExpertNode.execute(): - Removed iterative DESCRIBE→re-plan loop - Single plan+execute pass (schema is known) - Faster: 1 LLM call for plan instead of 2-3 Domain mastery test (eras_domain.md): 38/38 - Customer overview, junction table JOINs, full hierarchy traversal - Address lookup, Verbrauchsdaten, domain language, no DESCRIBE check Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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