feat: Add VIN decode endpoint to OCR Python service (#223) #224

New Issue

2026-02-19T03:19:25Z

egullickson commented

2026-02-19 03:19:25 +00:00

Relates to #223

Scope

Add a POST /decode/vin endpoint to the Python OCR service that uses Gemini to decode a VIN string into structured vehicle data.

Changes

Add decode_vin(vin: str) method to GeminiEngine with VIN-specific prompt and response schema
Add VinDecodeResponse Pydantic model in app/models/
Add POST /decode/vin route in app/routers/extract.py
VIN format validation (17 chars, excludes I/O/Q)

Response Schema

{
  "success": true,
  "vin": "1HGBH41JXMN109186",
  "year": 2020,
  "make": "Toyota",
  "model": "Camry",
  "trimLevel": "SE",
  "bodyType": "Sedan",
  "driveType": "FWD",
  "fuelType": "Gasoline",
  "engine": "2.5L 4-Cylinder",
  "transmission": "8-Speed Automatic",
  "confidence": 0.95,
  "processingTimeMs": 1200
}

Acceptance Criteria

Endpoint accepts VIN string, returns structured vehicle data via Gemini
VIN format validation before calling Gemini
Reuses GeminiEngine lazy init (no credential duplication)
Error handling for invalid VIN, Gemini failures

Relates to #223 ## Scope Add a `POST /decode/vin` endpoint to the Python OCR service that uses Gemini to decode a VIN string into structured vehicle data. ### Changes - Add `decode_vin(vin: str)` method to `GeminiEngine` with VIN-specific prompt and response schema - Add `VinDecodeResponse` Pydantic model in `app/models/` - Add `POST /decode/vin` route in `app/routers/extract.py` - VIN format validation (17 chars, excludes I/O/Q) ### Response Schema ```json { "success": true, "vin": "1HGBH41JXMN109186", "year": 2020, "make": "Toyota", "model": "Camry", "trimLevel": "SE", "bodyType": "Sedan", "driveType": "FWD", "fuelType": "Gasoline", "engine": "2.5L 4-Cylinder", "transmission": "8-Speed Automatic", "confidence": 0.95, "processingTimeMs": 1200 } ``` ### Acceptance Criteria - [ ] Endpoint accepts VIN string, returns structured vehicle data via Gemini - [ ] VIN format validation before calling Gemini - [ ] Reuses GeminiEngine lazy init (no credential duplication) - [ ] Error handling for invalid VIN, Gemini failures

egullickson added the

labels 2026-02-19 03:20:02 +00:00

egullickson referenced this issue

2026-02-19 03:20:43 +00:00

feat: Replace NHTSA VIN decode with Google Gemini via OCR service #223

egullickson referenced this issue

2026-02-19 03:25:27 +00:00

feat: Replace NHTSA VIN decode with Google Gemini via OCR service #223