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GGMU19 wants to merge 13 commits intoautomationExamples:mainfrom
GGMU19:development
Open

Development#18
GGMU19 wants to merge 13 commits intoautomationExamples:mainfrom
GGMU19:development

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@GGMU19 GGMU19 commented Feb 12, 2026

This pull request introduces a complete backend application for automatic transaction categorization, following a spec-driven development approach. The implementation includes API endpoints for creating, listing, filtering, deleting, and summarizing financial transactions, with rule-based categorization logic and in-memory storage. The codebase is fully tested, documented, and reproducible locally. The most important changes are grouped below by theme.

Core Application Implementation

  • Introduced the FastAPI backend in app/main.py with endpoints for transaction creation, listing, filtering, deletion, and summary, leveraging rule-based categorization and in-memory storage.
  • Added categorization logic in app/categorizer.py for keyword-based assignment to one of six categories.
  • Defined Pydantic models and validation in app/models.py for transaction data and input enforcement.
  • Implemented in-memory storage management in app/storage.py for transaction CRUD and summary operations.

Testing

  • Added integration tests in tests/test_api.py covering all API endpoints, input validation, and edge cases, ensuring high coverage and reliability.
  • Provided unit tests for categorization logic in tests/test_categorizer.py.

Documentation & Developer Experience

  • Replaced the generic project README with a detailed guide for setup, running, testing, and API reference in README.md.
  • Added a manual testing guide in TESTING.md and a ready-to-use Postman collection for API requests. [1] [2]
  • Documented the API contract in SPECS/api-spec.md and outlined feature scope and acceptance criteria in SPECS/feature-template.md. [1] [2]
  • Provided an overview of the spec-driven and AI-assisted development process in APPROACH.md.

Project Hygiene

  • Removed obsolete rules and TODO files (RULES.md, TODO.md) and added package markers for Python modules. [1] [2] [3] [4]

Summary:
This PR delivers a fully spec-driven, AI-assisted backend for transaction categorization, with robust documentation, testing, and developer tooling for easy local setup and validation.

…ance criteria

- Fix: Move /transactions/summary endpoint before /{transaction_id} to prevent route matching issues
- Fix: Add test isolation by clearing storage between tests
- Fix: Update summary() to initialize all categories
- Improve: Add comprehensive docstrings to all functions and classes
- Update: Check off all completed acceptance criteria in feature spec
- Update: Refresh TODO.md with meaningful future proposals
- Add: Populate .gitignore with Python-specific patterns
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