# Implementation Plan: Refactor CLI Scripts to Web Application

**Branch**: `010-refactor-cli-to-web` | **Date**: 2026-01-07 | **Spec**: [specs/010-refactor-cli-to-web/spec.md](specs/010-refactor-cli-to-web/spec.md)
**Input**: Feature specification from `/specs/010-refactor-cli-to-web/spec.md`

**Note**: This template is filled in by the `/speckit.plan` command. See `.specify/templates/commands/plan.md` for the execution workflow.

## Summary

This project aims to integrate the functionality of standalone CLI tools (`search_script.py`, `run_mapper.py`, `debug_db_api.py`, `get_dataset_structure.py`) into the existing Web Application (FastAPI + SvelteKit). This involves implementing new **Plugins** (`SearchPlugin`, `MapperPlugin`, `DebugPlugin`) to handle dataset searching, column mapping, and system diagnostics. The legacy CLI scripts will be removed after their functionality is successfully ported.

## Technical Context

<!--
  ACTION REQUIRED: Replace the content in this section with the technical details
  for the project. The structure here is presented in advisory capacity to guide
  the iteration process.
-->

**Language/Version**: Python 3.9+ (Backend), Node.js 18+ (Frontend)
**Primary Dependencies**: FastAPI, SvelteKit, Tailwind CSS, Pydantic, SQLAlchemy, `superset_tool` (internal lib)
**Storage**: SQLite (for job history/results, connection configs), Filesystem (for temporary file uploads)
**Testing**: pytest (Backend), vitest (Frontend - if applicable)
**Target Platform**: Linux server (Dockerized environment)
**Project Type**: Web Application (Backend + Frontend)
**Performance Goals**: Search operations should handle large metadata sets without blocking the main thread (async/background tasks).
**Constraints**: Must reuse existing `superset_tool` library. Must integrate with existing Authentication and TaskManager systems.
**Scale/Scope**: 3 new tools (Search, Mapper, Debug), ~5-7 new API endpoints, ~3-4 new frontend pages.

## Constitution Check

*GATE: Must pass before Phase 0 research. Re-check after Phase 1 design.*

1.  **Causal Validity**: Contracts (API/Data Models) will be defined before implementation.
2.  **Immutability**: Architecture layers (`superset_tool` vs `backend`) will be respected.
3.  **Semantic Format**: All new code will follow `[DEF]` syntax.
4.  **Fractal Complexity**: New tools will be modularized as Plugins (`SearchPlugin`, `MapperPlugin`, `DebugPlugin`).

## Project Structure

### Documentation (this feature)

```text
specs/010-refactor-cli-to-web/
├── plan.md              # This file (/speckit.plan command output)
├── research.md          # Phase 0 output (/speckit.plan command)
├── data-model.md        # Phase 1 output (/speckit.plan command)
├── quickstart.md        # Phase 1 output (/speckit.plan command)
├── contracts/           # Phase 1 output (/speckit.plan command)
└── tasks.md             # Phase 2 output (/speckit.tasks command - NOT created by /speckit.plan)
```

### Source Code (repository root)
<!--
  ACTION REQUIRED: Replace the placeholder tree below with the concrete layout
  for this feature. Delete unused options and expand the chosen structure with
  real paths (e.g., apps/admin, packages/something). The delivered plan must
  not include Option labels.
-->

```text
backend/
├── src/
│   ├── api/
│   │   └── routes/
│   │       └── connections.py # New: Connection config endpoints
│   ├── models/
│   │   └── connection.py      # New: DB model for saved connections
│   └── plugins/
│       ├── search.py          # New: SearchPlugin
│       ├── mapper.py          # New: MapperPlugin
│       └── debug.py           # New: DebugPlugin
└── tests/

frontend/
├── src/
│   ├── components/
│   │   ├── tools/             # New: UI components for tools
│   │   │   ├── SearchTool.svelte
│   │   │   ├── MapperTool.svelte
│   │   │   └── DebugTool.svelte
│   ├── routes/
│   │   ├── tools/             # New: Pages
│   │   │   ├── search/
│   │   │   ├── mapper/
│   │   │   └── debug/
│   │   └── settings/
│   │       └── connections/   # New: Connection management
│   └── services/
│       └── toolsService.js    # New: API client
```

**Structure Decision**: We will extend the existing `backend/` and `frontend/` structure. The CLI logic will be refactored into `plugins/` in the backend, executed via the generic Task API. The frontend will gain a new "Tools" section that interacts with these plugins.

## Complexity Tracking

> **Fill ONLY if Constitution Check has violations that must be justified**

| Violation | Why Needed | Simpler Alternative Rejected Because |
|-----------|------------|-------------------------------------|
| N/A | | |