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ss-tools/specs/003-project-launch-script/plan.md

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# Implementation Plan: Project Launch Script
**Branch**: `003-project-launch-script` | **Date**: 2025-12-20 | **Spec**: [specs/003-project-launch-script/spec.md](specs/003-project-launch-script/spec.md)
**Input**: Feature specification from `/specs/003-project-launch-script/spec.md`
## Summary
Create a root-level bash script (`run.sh`) to automate the setup and concurrent execution of the backend (FastAPI) and frontend (Svelte/Vite) development servers. The script will handle dependency checks, installation, and graceful termination of both processes.
## Technical Context
**Language/Version**: Python 3.9+, Node.js 18+
**Primary Dependencies**: `uvicorn`, `npm`, `bash`
**Storage**: N/A
**Testing**: Manual verification of service availability; `pytest` for backend logic if any.
**Target Platform**: Linux
**Project Type**: Web application (frontend + backend)
**Performance Goals**: Services accessible within 30 seconds.
**Constraints**: Must handle `SIGINT` (Ctrl+C) to kill all child processes.
**Scale/Scope**: Developer utility script.
## Constitution Check
*GATE: Must pass before Phase 0 research. Re-check after Phase 1 design.*
| Gate | Status | Rationale |
|------|--------|-----------|
| Python 3.9+ | PASS | Backend uses Python 3.9+ |
| Node.js 18+ | PASS | Frontend uses Node.js 18+ |
| Project Structure | PASS | Follows `backend/`, `frontend/` structure |
| Executable from root | PASS | Planned as `./run.sh` |
**Post-Design Re-evaluation**: Design artifacts (research, data-model, contracts) confirm compliance with all project principles. No violations found.
## Project Structure
### Documentation (this feature)
```text
specs/003-project-launch-script/
├── plan.md # This file
├── research.md # Phase 0 output
├── data-model.md # Phase 1 output
├── quickstart.md # Phase 1 output
├── contracts/ # Phase 1 output
└── tasks.md # Phase 2 output
```
### Source Code (repository root)
```text
run.sh # New launch script
backend/
├── src/
│ └── app.py
└── requirements.txt
frontend/
├── src/
└── package.json
```
**Structure Decision**: Option 2: Web application. The script will reside in the root to orchestrate both directories.
## Complexity Tracking
> **Fill ONLY if Constitution Check has violations that must be justified**
| Violation | Why Needed | Simpler Alternative Rejected Because |
|-----------|------------|-------------------------------------|
| None | - | - |