Desktop decision engine for Indonesian Stock Exchange (IDX) investors.
Built with Go, Wails, Svelte 5, and Tailwind CSS.

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What is Panen?

Panen ("Harvest" in Bahasa Indonesia) is an open-source desktop application that helps IDX investors make informed buy, hold, and sell decisions with clarity and conviction. It is not a brokerage, social network, or news feed -- it is a focused decision engine that answers two questions:

• "I have capital. Which IDX stocks should I buy, and when?"
• "I already own stocks. Should I keep, sell, or rebalance?"

Key Features

• Two investment modes -- Value (capital growth) and Dividend (passive income), each with distinct workflows and metrics
• Valuation models -- Graham Number, PBV bands, PER bands with configurable margin of safety
• Risk profiles -- Conservative, Moderate, and Aggressive parameters per portfolio
• Crash playbook -- Pre-built entry plans for market downturns, prepared during calm markets
• Monthly payday assistant -- Capital addition scheduling with smart deployment suggestions
• Conviction checklists -- Auto and manual checks that gate buy/sell suggestions
• Trailing stop suggestions -- Exit strategy guidance for Value Mode holdings
• Stock screener -- Filter and rank stocks by valuation, dividends, and fundamentals
• Dividend calendar -- Track ex-dates and projected income
• Fundamental change alerts -- Detect and flag significant changes in stock fundamentals
• Pluggable data providers -- Yahoo Finance (primary) and IDX (secondary), with community-extensible provider interface
• Export/Import -- Full data portability for backup and device migration
• Internationalization -- English and Bahasa Indonesia
• Light and dark themes -- System-aware with manual override
• Local-first and private -- All data on your device, no accounts, no telemetry, no server

Installation

macOS and Linux

Install the latest release with a single command:

curl -fsSL https://raw.githubusercontent.com/lugassawan/panen/main/scripts/install.sh | sh

To install a specific version:

PANEN_VERSION=v1.0.0 curl -fsSL https://raw.githubusercontent.com/lugassawan/panen/main/scripts/install.sh | sh

Install locations:

Platform	Location
macOS	/Applications/Panen.app (writable by admin users without sudo)
Linux	~/.local/bin/panen + .desktop + icon (no sudo required)

Windows

Download the latest panen-windows-amd64.zip from the Releases page, extract it, and run panen.exe.

Building from Source

Prerequisites

• mise -- manages Go, Node.js, pnpm, and other tool versions
• Wails CLI

Build

git clone git@github.com:lugassawan/panen.git
cd panen
mise install         # Install pinned tool versions
make setup           # Install Wails CLI, frontend dependencies, and git hooks
make build           # Production build → build/bin/

Tech Stack

Layer	Technology
Backend	Go 1.26, Wails v2
Frontend	Svelte 5, TypeScript, Tailwind CSS v4
Database	SQLite (pure-Go, no CGO)
Icons	Lucide (lucide-svelte)
Fonts	Plus Jakarta Sans, DM Sans, DM Mono (self-hosted WOFF2)
Build	Vite 7, pnpm
Linting	golangci-lint v2 (custom plugin), Biome v2
Tool versioning	mise

Project Structure

panen/
├── backend/
│   ├── app.go           # Composition root (App struct, Startup, Shutdown)
│   ├── presenter/       # Per-domain handlers, DTOs, converters
│   ├── domain/          # Entities, value objects, repository interfaces
│   ├── usecase/         # Application services (orchestration + validation)
│   └── infra/           # Database, scraper, platform implementations
├── frontend/src/
│   ├── lib/components/  # Reusable UI primitives
│   ├── pages/           # Page components organized by domain
│   ├── i18n/            # Internationalization (en/id translations)
│   └── ...              # Stores, types, utilities
├── configs/             # Embedded config files (brokers, indices, sectors)
├── tools/lint/          # Custom golangci-lint plugin (panenlint)
├── docs/                # Documentation and guides
├── scripts/             # Release and install scripts
├── main.go              # Wails entry point
└── wails.json           # Wails project config

Development

make dev               # Start Wails dev server with HMR
make lint              # Run Go and frontend linters
make fmt               # Auto-format all code
make test              # Run all tests (Go + frontend)
make coverage          # Generate coverage reports

See CONTRIBUTING.md for the full development guide, including branch conventions, commit format, testing strategy, and how to add data providers or translations.

Documentation

• Getting Started -- First launch, creating brokerages and portfolios
• Portfolio Management -- Value vs. Dividend modes, holdings, and workflows
• Valuation Models -- Graham Number, PBV/PER bands, margin of safety
• Risk Profiles -- Conservative, Moderate, and Aggressive parameters
• Crash Playbook -- Building and using crash playbooks
• Design System -- Tokens, theming, and component reference

License

Licensed under the Apache License, Version 2.0.

Trademark Notice

"Panen" and the Panen logo are trademarks of Lugas Septiawan. Use of these trademarks in modified versions of this software requires prior written permission.