# Implementation Plan: Result Preparation Refactoring

**Branch**: `002-result-preparation-refactoring` | **Date**: 2025-10-11 | **Spec**: [spec.md](spec.md)
**Input**: Feature specification from `/specs/002-result-preparation-refactoring/spec.md`

## Summary

This plan outlines the refactoring of the result preparation mechanism. The current system groups similar desires but does not categorize them into the required `Go-to`, `Also good`, `Considerable`, `No-goes`, and `Needs discussion` categories. This refactoring will replace the existing desire grouping logic in the `LLMService` with a more sophisticated analysis that aligns with the feature specification. The frontend will be updated to correctly display these new categories.

## Technical Context

**Language/Version**: TypeScript (v5.x)
**Primary Dependencies**:
- **Backend**: Node.js, Express, ws (WebSockets), @google/generative-ai
- **Frontend**: React, Material-UI, WebSockets
**Storage**: In-memory for session data (no persistent storage)
**Testing**: Jest
**Target Platform**: Web Browser
**Project Type**: Web Application (Frontend + Backend)
**Performance Goals**: Real-time updates for session state changes. LLM analysis should complete within a reasonable time frame (e.g., < 10 seconds).
**Constraints**: The solution must integrate with the existing WebSocket-based communication.
**Scale/Scope**: Sessions support up to 20 participants.

## Constitution Check

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

- **I. Defined Technology Stack**: PASS (Node.js, React)
- **II. UI/UX Consistency**: PASS (Material-UI is used)
- **III. Container-First Development**: PASS (Docker is used)
- **IV. Test-Driven Development (TDD)**: PASS (Tests exist and will be added)
- **V. API-First Design**: PASS (Backend and frontend are decoupled)

## Project Structure

### Documentation (this feature)

```
specs/002-result-preparation-refactoring/
├── 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)
```
backend/
├── src/
│   ├── services/
│   │   └── LLMService.ts
│   └── ws/
│       └── index.ts
└── tests/

frontend/
├── src/
│   ├── components/
│   │   └── ResultsDisplay.tsx
│   ├── hooks/
│   │   └── useSession.ts
│   └── pages/
│       └── SessionPage.tsx
└── tests/
```

**Structure Decision**: The existing project structure will be used. The primary changes will be in the `backend/src/services/LLMService.ts` and `backend/src/ws/index.ts` for the backend, and `frontend/src/components/ResultsDisplay.tsx` for the frontend.

## Complexity Tracking

No violations to the constitution were identified.