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+# Office Document Support Integration
+
+**Date**: 2025-11-12
+**Status**: ✅ INTEGRATED & TESTED
+**Sub-Proposal**: [add-office-document-support](../add-office-document-support/PROPOSAL.md)
+
+---
+
+## Overview
+
+This document tracks the integration of Office document support (DOC, DOCX, PPT, PPTX) into the main OCR batch processing system. The integration was completed as a sub-proposal under the OpenSpec framework.
+
+## Integration Summary
+
+### Components Integrated
+
+1. **Office Converter Service** ([backend/app/services/office_converter.py](../../../backend/app/services/office_converter.py))
+   - LibreOffice headless mode for Office to PDF conversion
+   - Support for DOC, DOCX, PPT, PPTX formats
+   - Automatic cleanup of temporary conversion files
+
+2. **Document Preprocessor Enhancement** ([backend/app/services/preprocessor.py](../../../backend/app/services/preprocessor.py))
+   - Added Office MIME type mappings (application/msword, application/vnd.openxmlformats-officedocument.*)
+   - ZIP-based integrity validation for modern Office formats
+   - Office format detection and validation
+
+3. **OCR Service Integration** ([backend/app/services/ocr_service.py](../../../backend/app/services/ocr_service.py))
+   - Office document detection in `process_image()` method
+   - Automatic conversion pipeline: Office → PDF → Images → OCR
+
+4. **File Manager Updates** ([backend/app/services/file_manager.py](../../../backend/app/services/file_manager.py))
+   - Extended allowed extensions to include Office formats
+
+5. **Configuration Updates**
+   - `.env`: Added Office formats to ALLOWED_EXTENSIONS
+   - `app/core/config.py`: Extended default allowed extensions list
+
+### Processing Pipeline
+
+```
+Office Document (DOC/DOCX/PPT/PPTX)
+    ↓
+LibreOffice Headless Conversion
+    ↓
+PDF Document
+    ↓
+PDF to Images (existing)
+    ↓
+PaddleOCR Processing (existing)
+    ↓
+Markdown/JSON Output (existing)
+```
+
+## Test Results
+
+### Test Document
+- **File**: test_document.docx (1,521 bytes)
+- **Content**: Mixed Chinese/English text with structured formatting
+- **Batch ID**: 24
+
+### Results
+- **Status**: ✅ Completed Successfully
+- **Processing Time**: 375.23 seconds (includes PaddleOCR model initialization)
+- **OCR Accuracy**: 97.39% confidence
+- **Text Regions**: 20 regions detected
+- **Language**: Chinese (mixed with English)
+
+### Verification
+- ✅ DOCX upload and validation
+- ✅ DOCX → PDF conversion (LibreOffice headless mode)
+- ✅ PDF → Images conversion
+- ✅ OCR processing (PaddleOCR with PP-LCNet_x1_0_doc_ori structure analysis)
+- ✅ Markdown output generation with preserved structure
+
+### Output Sample
+```markdown
+Office Document OCR Test
+
+測試文件說明
+
+這是一個用於測試 Tool_OCR 系統 Office 文件支援功能的測試文件。
+
+本系統現已支援以下 Office格式：
+
+• Microsoft Word: DOC, DOCX
+• Microsoft PowerPoint: PPT, PPTX
+
+處理流程
+
+Office 文件的處理流程如下：
+
+1. 使用 LibreOffice 將 Office 文件轉換為 PDF
+```
+
+## Bugs Fixed During Integration
+
+1. **Database Column Error**: Fixed return value unpacking order in file_manager.py
+2. **Missing Office MIME Types**: Added Office MIME type mappings to preprocessor.py
+3. **Missing Integrity Validation**: Added Office format integrity validation
+4. **Configuration Loading Issue**: Updated `.env` file with Office formats
+5. **API Endpoint Mismatch**: Fixed test script to use correct API paths
+
+## Dependencies Added
+
+### System Dependencies (Homebrew)
+```bash
+brew install libreoffice
+```
+
+### Configuration
+- LibreOffice path: `/Applications/LibreOffice.app/Contents/MacOS/soffice`
+- Conversion mode: Headless (`--headless --convert-to pdf`)
+
+## API Changes
+
+**No breaking changes**. Existing API endpoints remain unchanged:
+- `POST /api/v1/upload` - Now accepts Office formats
+- `POST /api/v1/ocr/process` - Automatically handles Office formats
+- `GET /api/v1/batch/{batch_id}/status` - Unchanged
+- `GET /api/v1/ocr/result/{file_id}` - Unchanged
+
+## Task Updates
+
+### Main Proposal: add-ocr-batch-processing
+
+**Updated Tasks**:
+- Task 3: Document Preprocessing - **100% complete** (was 83%)
+- Task 3.4: Implement Office document to PDF conversion - **✅ COMPLETED**
+
+**Updated Services**:
+- Document Preprocessor: Now includes Office format support
+- OCR Service: Now includes Office document conversion pipeline
+- Added: Office Converter service
+
+**Updated Dependencies**:
+- Added LibreOffice to system dependencies
+
+**Updated Phase 1 Progress**: **~87% complete** (was ~85%)
+
+## Documentation
+
+### Sub-Proposal Documentation
+- [PROPOSAL.md](../add-office-document-support/PROPOSAL.md) - Feature proposal
+- [tasks.md](../add-office-document-support/tasks.md) - Implementation tasks
+- [IMPLEMENTATION.md](../add-office-document-support/IMPLEMENTATION.md) - Implementation summary
+
+### Test Resources
+- Test script: [demo_docs/office_tests/test_office_upload.py](../../../demo_docs/office_tests/test_office_upload.py)
+- Test document: [demo_docs/office_tests/test_document.docx](../../../demo_docs/office_tests/test_document.docx)
+- Document creation: [demo_docs/office_tests/create_docx.py](../../../demo_docs/office_tests/create_docx.py)
+
+## Performance Impact
+
+- **First-time processing**: ~375 seconds (includes PaddleOCR model download/initialization)
+- **Subsequent processing**: Expected to be faster (~10-30 seconds per document)
+- **Memory usage**: No significant increase observed
+- **Storage**: LibreOffice adds ~600MB to system requirements
+
+## Migration Notes
+
+**Backward Compatibility**: ✅ Fully backward compatible
+- Existing image and PDF processing unchanged
+- No database schema changes required
+- No API contract changes
+
+**Upgrade Path**:
+1. Install LibreOffice via Homebrew: `brew install libreoffice`
+2. Update `.env` file with Office formats in ALLOWED_EXTENSIONS
+3. Restart backend service
+4. Verify with test script: `python demo_docs/office_tests/test_office_upload.py`
+
+## Next Steps
+
+Integration complete. The Office document support feature is now part of the main OCR batch processing system and ready for production use.
+
+### Future Enhancements (Optional)
+- Add unit tests for office_converter.py
+- Add support for Excel files (XLS, XLSX)
+- Optimize LibreOffice conversion performance
+- Add preview generation for Office documents
+
+---
+
+**Integration Status**: ✅ COMPLETE
+**Test Status**: ✅ PASSED
+**Documentation Status**: ✅ COMPLETE