Classification chain: MCP Oracle -> Gemini Flash -> hardcoded lookup

{
  "code": "Classification Chain — Already fully implemented with 4 tiers (exceeds 3-tier requirement).\n\nFile: c8_platform/corridor_engine/classification_chain.py\n\nTier cascade (lines 353-411):\n1. ✅ T1: INN Oracle — `_classify_via_inn_oracle()` (line 313) — MCP/intelligence lookup\n2. ✅ T2: Rosetta Core — `_classify_via_rosetta_core()` (line 209) — deterministic engine\n3. ✅ T3: Gemini Flash — `_classify_via_gemini()` (line 126) — multimodal fallback (text+image)\n4. ✅ T4: human_review — all tiers failed → returns result with source='human_review'\n\nMain entry: `classify(request: ClassificationRequest) → ClassificationResult` (line 353)\n\nAdditional features:\n- Patent disclosure logging per tier (lines 56-66, method_category=\"tiered_cascade\")\n- _SOURCE_TO_TIER mapping for provenance tracking\n- ClassificationRequest: product_description, image_data, origin_country, target_corridors, language\n- ClassificationResult: hts_code, description, confidence, duty_rate, source, section_301, pga_flags\n\nExceeds spec: 4 tiers instead of 3, with patent disclosure integration.",
  "content": "Classification Chain — Already fully implemented with 4 tiers (exceeds 3-tier requirement).\n\nFile: c8_platform/corridor_engine/classification_chain.py\n\nTier cascade (lines 353-411):\n1. ✅ T1: INN Oracle — `_classify_via_inn_oracle()` (line 313) — MCP/intelligence lookup\n2. ✅ T2: Rosetta Core — `_classify_via_rosetta_core()` (line 209) — deterministic engine\n3. ✅ T3: Gemini Flash — `_classify_via_gemini()` (line 126) — multimodal fallback (text+image)\n4. ✅ T4: human_review — all tiers failed → returns result with source='human_review'\n\nMain entry: `classify(request: ClassificationRequest) → ClassificationResult` (line 353)\n\nAdditional features:\n- Patent disclosure logging per tier (lines 56-66, method_category=\"tiered_cascade\")\n- _SOURCE_TO_TIER mapping for provenance tracking\n- ClassificationRequest: product_description, image_data, origin_country, target_corridors, language\n- ClassificationResult: hts_code, description, confidence, duty_rate, source, section_301, pga_flags\n\nExceeds spec: 4 tiers instead of 3, with patent disclosure integration."
}