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# Contributing to Homelable
Thanks for taking the time to contribute! This document covers everything you need to get started.
---
## Table of Contents
- [Ways to Contribute](#ways-to-contribute)
- [Reporting Bugs](#reporting-bugs)
- [Suggesting Features](#suggesting-features)
- [Development Setup](#development-setup)
- [Project Structure](#project-structure)
- [Coding Standards](#coding-standards)
- [Testing](#testing)
- [Submitting a Pull Request](#submitting-a-pull-request)
- [Commit Message Format](#commit-message-format)
---
## Ways to Contribute
- Report bugs or unexpected behavior
- Suggest new features or improvements
- Fix open issues (check the [issue tracker](https://github.com/Pouzor/homelable/issues))
- Improve documentation
- Add service signatures to `service_signatures.json`
---
## Reporting Bugs
Before opening an issue, search existing ones to avoid duplicates.
When filing a bug, include:
- **Homelable version** (visible in the sidebar bottom-left)
- **Deployment method** (Docker Compose, Proxmox LXC, source)
- **Steps to reproduce**
- **Expected vs actual behavior**
- **Relevant logs** (`docker compose logs backend` / `docker compose logs frontend`)
- **Browser console errors** if it's a UI issue
---
## Suggesting Features
Open an issue with the `enhancement` label. Describe:
- The problem you're trying to solve
- Your proposed solution
- Any alternatives you considered
For large changes, discuss first before writing code — it avoids wasted effort.
---
## Development Setup
### Prerequisites
- **Node.js 20+** and **npm**
- **Python 3.113.13** (3.14 not yet supported by all dependencies)
- **nmap** installed on your system (required for scanner)
- **Docker + Docker Compose** (optional, for full-stack testing)
### 1. Clone the repo
```bash
git clone https://github.com/Pouzor/homelable.git
cd homelable
```
### 2. Backend
```bash
cd backend
python3.13 -m venv .venv
source .venv/bin/activate # Windows: .venv\Scripts\activate
pip install -r requirements.txt
# Copy and configure environment
cp .env.example .env # edit AUTH_PASSWORD_HASH, SECRET_KEY, etc.
# Start the backend (auto-reloads on change)
uvicorn app.main:app --reload --port 8000
```
API docs available at `http://localhost:8000/docs`.
### 3. Frontend
```bash
cd frontend
npm install
npm run dev # http://localhost:5173
```
Vite proxies `/api` to `localhost:8000` — the backend must be running.
### 4. Verify tooling
```bash
./scripts/verify-tooling.sh
```
---
## Project Structure
```
homelable/
├── frontend/src/
│ ├── components/
│ │ ├── canvas/ # React Flow canvas, custom nodes & edges
│ │ ├── panels/ # Sidebar, detail panel, toolbar
│ │ ├── modals/ # Add/edit node, scan config, pending devices
│ │ └── ui/ # Shadcn/ui base components
│ ├── stores/ # Zustand state (canvas, auth, scan)
│ ├── hooks/ # Custom React hooks
│ ├── types/ # TypeScript interfaces & enums
│ ├── api/ # Axios client & typed endpoints
│ └── utils/ # Layout, export, color helpers
├── backend/app/
│ ├── api/routes/ # FastAPI route handlers
│ ├── services/ # Scanner, status checker, canvas service
│ ├── db/ # SQLAlchemy models, Alembic migrations
│ ├── schemas/ # Pydantic request/response schemas
│ └── core/ # Config, JWT, scheduler
├── docker/ # Nginx configs
├── scripts/ # LXC bootstrap, dev helpers
└── mcp/ # MCP server (AI integration)
```
---
## Coding Standards
### General
- No untested code merged — every feature or fix must include tests
- Keep changes focused — one concern per PR
### Frontend (TypeScript + React)
- Strict TypeScript — no `any`, no type assertions unless truly necessary
- React Flow node domain fields go in `node.data`, never on the node root
- State management via Zustand stores — no prop drilling beyond 2 levels
- Styling via TailwindCSS utility classes — follow the existing [design system](#design-system)
- Run before committing:
```bash
cd frontend
npm run lint
npm run typecheck
npm test
```
### Backend (Python + FastAPI)
- Python 3.11+ syntax
- Pydantic v2 schemas for all request/response types
- SQLAlchemy async sessions — never block the event loop
- Scanner logic runs in a background thread — never in an async route directly
- All schema changes via Alembic migrations — never modify tables directly
- Run before committing:
```bash
cd backend
source .venv/bin/activate
ruff check .
pytest
```
### Design System
| Token | Value |
|---|---|
| Background | `#0d1117` |
| Surface | `#161b22` |
| Card | `#21262d` |
| Accent cyan | `#00d4ff` |
| Online | `#39d353` |
| Offline | `#f85149` |
| Pending | `#e3b341` |
| Font (UI) | Inter |
| Font (IPs/ports) | JetBrains Mono |
---
## Testing
Tests run automatically via a pre-commit hook when frontend or backend files are staged.
### Frontend
```bash
cd frontend
npm test # run all tests
npm run test:coverage # with coverage report
```
Test files live in `__tests__/` next to their module, named `*.test.ts(x)`.
**What to test:** Zustand store actions, utility functions, non-trivial component logic.
### Backend
```bash
cd backend
source .venv/bin/activate
pytest # run all tests
pytest -v tests/test_nodes.py # single file
```
Test files live in `backend/tests/test_*.py`.
**What to test:** all API routes (happy path + error cases), auth flows, service logic.
Use the `client` and `headers` fixtures from `conftest.py` — they provide an in-memory SQLite database so tests are isolated and fast.
---
## Submitting a Pull Request
1. **Fork** the repo and create a branch from `main`:
```bash
git checkout -b feat/my-feature
```
2. **Make your changes** — include tests.
3. **Run the full test suite** (frontend + backend) and make sure everything passes.
4. **Open a PR** against `main`:
- Use a clear title (see commit format below)
- Describe what changed and why
- Reference any related issues (`Closes #123`)
- Include screenshots for UI changes
5. Keep the PR focused — one feature or fix per PR. Large refactors should be discussed in an issue first.
---
## Commit Message Format
Follow [Conventional Commits](https://www.conventionalcommits.org/):
```
<type>: <short description>
[optional body]
```
| Type | When to use |
|---|---|
| `feat` | New feature |
| `fix` | Bug fix |
| `docs` | Documentation only |
| `refactor` | Code change with no behavior change |
| `test` | Adding or fixing tests |
| `chore` | Build, deps, tooling |
**Examples:**
```
feat: add logout button to sidebar
fix: stop click propagation on pending device checkbox
docs: add CONTRIBUTING.md
```
---
## Questions?
Open a [GitHub Discussion](https://github.com/Pouzor/homelable/discussions) or drop a comment on a relevant issue.