oksigenia-farmkit 🌾

Modular farming-game engine for Flutter / Flame.

Turn-based, weather-driven crop yield, quality-driven economy. Designed to be embedded in any Flutter app that needs a farm-simulation mini-game.

Status: 0.7.0-beta.2 — public API is not yet stable. Expect breaking changes between minor versions until 1.0.0.

▶ Live demo (Flutter web · auto-deployed from main).

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Why

The Flutter / Flame ecosystem has plenty of arcade and puzzle game scaffolding, but no maintained, permissively-licensed farming-simulation kit. This package fills that gap with three opinionated subsystems:

• Engine: weekly turn loop, fields, crops, growth model.
• Economy: dynamic pricing where crop quality shifts the sell price.
• Weather: pluggable provider — supply real meteorological data or use the built-in deterministic mock.

The kit is engine-only. It exposes a pure-Dart API; rendering and assets are the consumer's responsibility. A minimal Flutter + Flame example lives under example/.

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At a glance

import 'package:oksigenia_farmkit/oksigenia_farmkit.dart';

final farm = Farm(
  fields: [
    Field(id: 'a', size: 1.0, soil: SoilType.loam),
    Field(id: 'b', size: 0.5, soil: SoilType.clay),
  ],
  weather: MockWeatherProvider.seasonal(),
);

farm.plant(fieldId: 'a', crop: Crop.tomato);
farm.advanceTurn();           // one in-game week passes
print(farm.field('a').growthStage);   // 'seedling' | 'growing' | 'ready'
print(farm.economy.expectedPrice(Crop.tomato, quality: 0.8));

// Crop rotation matters: heavy feeders drain soil fertility, and
// planting the same family back-to-back drains it faster.
print(farm.field('a').fertility);              // 1.0 on virgin land
farm.harvest('a');                             // tomato → fertility -0.25
farm.plant(fieldId: 'a', crop: Crop.legumeCover); // restorer crop

The example app expands this into a full playable loop with Flame rendering, save/load via Hive, and a minimal HUD.

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Install

Once published to pub.dev:

dependencies:
  oksigenia_farmkit: ^0.7.0-beta.2

Until then, depend on the GitHub repo:

dependencies:
  oksigenia_farmkit:
    git:
      url: https://github.com/OksigeniaSL/oksigenia-farmkit.git
      ref: main

Flutter >=3.10.0, Dart >=3.0.0. No platform-specific code in the core; runs anywhere Flutter runs.

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Architecture

The kit is split into four subsystems behind a single facade (Farm). Each subsystem can be replaced or wrapped without forking:

oksigenia_farmkit
├── engine/        Turn loop, fields, crops, growth state machine.
├── economy/       Pricing model, market dynamics, quality multipliers.
├── weather/       WeatherProvider interface + MockWeatherProvider.
└── persistence/   Save / load via Dart maps (Hive-friendly, no Hive dependency).

The reason for this split: integration teams replace what they need. A real-world weather feed plugs into WeatherProvider. A custom economy (volume discounts, regional pricing) plugs into EconomyProvider. Persistence layer is whatever the host app prefers — the kit emits and consumes plain Map<String, dynamic>.

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Status & roadmap

This is a beta. The data model and public API will move until 1.0.0. See CHANGELOG.md for breaking changes.

Tracked work lives in the project board. Highlights for 0.x:

• Crop pest / disease subsystem. Shipped in 0.6.0-beta.1.
• Soil degradation & rotation rewards. Shipped in 0.2.0-beta.1.
• Multi-region weather (climates). Shipped in 0.3.0-beta.1.
• Saved-game migration helpers between minor versions.
• Pub.dev publication after 0.4.0.

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Contributing

Bug reports, feature ideas, and pull requests are welcome. Read CONTRIBUTING.md before opening a PR. For security issues, see SECURITY.md — please do not file them as public issues.

This project follows the Contributor Covenant Code of Conduct.

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License

MIT. See LICENSE.

Copyright © 2026 Oksigenia SL.

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Sponsor / Donaciones

This project is developed in the open and offered under MIT. If it saves you time or you want to support continued development, you can chip in:

• Liberapay (recurring, no fees): https://liberapay.com/Oksigenia
• PayPal (one-off): https://www.paypal.com/donate/?business=paypal@oksigenia.cc&currency_code=EUR

A "Sponsor" button is also enabled at the top of this repository (powered by .github/FUNDING.yml).

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En castellano

oksigenia-farmkit es un motor de juego de granja para Flutter / Flame. Turnos semanales, rendimiento de cultivos según clima real o simulado, economía sensible a la calidad. Embebible en cualquier app Flutter como minijuego.

Estado: beta. La API pública puede cambiar hasta la versión 1.0.0.

Para integradores en LATAM: el kit es agnóstico de cultivos — los productos del catálogo del host se mapean a la abstracción Crop. Un WeatherProvider real (por ejemplo Open-Meteo) se conecta sustituyendo el mock por defecto.

PRs y issues bienvenidos. Antes de abrir un PR, leer CONTRIBUTING.md.