# 2026-06-12-completed-changes-archive/backend-frontend-refactoring
dir: 2026-06-12-completed-changes-archive/backend-frontend-refactoring

index: 2026-06-12-completed-changes-archive/backend-frontend-refactoring/.pi-map.index.md

## role
This package serves as an archived planning and specification artifact for a completed structural refactoring that decomposed a monolithic Python/FastAPI backend and TypeScript frontend into domain-based modular subpackages.
## files
- .openspec.yaml | Defines an OpenSpec configuration file with schema type and creation date metadata
- design.md | Architecture design document for a large-scale backend/frontend refactoring to decompose monolithic modules into domain-based subpackages while preserving API contracts and behavior | dep: FastAPI, Pydantic, SQLAlchemy, Docker, cloudflared, React/TypeScript
- proposal.md | This file is a technical proposal document outlining a pure structural refactoring to split monolithic backend files and reorganize frontend code without changing any behavior.
- spec.md | Defines a pure structural refactoring specification for extracting schemas, splitting monolithic services, reorganizing frontend features, and standardizing naming conventions without changing any behavior or API contracts. | dep: Pydantic, FastAPI (implied by Depends, API routers), SQLAlchemy AsyncSession, React/TypeScript frontend, Docker, ruff, npm
- tasks.md | Defines a multi-phase refactoring plan to reorganize a Python/FastAPI backend and TypeScript frontend codebase into modular subpackages with verification steps | dep: FastAPI, Docker, pytest, ruff, py_compile, npm, TypeScript, React Router
## arch
Document-driven waterfall planning architecture using OpenSpec schema configuration, multi-phase task breakdown (design → proposal → specification → implementation), and strict behavior-preserving refactoring patterns with API contract immutability and verification gates.
## tags
frontend, refactoring, defines, design, backend, monolithic, behavior, fastapi
## symbols
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## workflows
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## dirty
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