An open-source, self-hosted alternative to Pokémon HOME — backup your saves, store unlimited Pokémon, transfer between games, and track your living dex. Built on PKHeX.Core.

Pokémon HOME's biggest pain points, fixed:

• No paywall, no hostage Pokémon — unlimited boxes on your own disk.
• Real save backups — versioned snapshots of entire save files, not just the Pokémon (Pokémon games are excluded from NSO cloud saves).
• Transparent legality — full PKHeX legality report per Pokémon, shown to you, never silently blocking.
• One app, every feature — browser UI works from desktop and phone; no mobile/Switch feature split.
• Free transfers — optional strict mode mimics official transfer rules; default mode lets you move anything, with warnings.
• Romhacks & fangames — profile-driven support for pokeemerald-expansion-style hacks and Pokémon Essentials saves (phased).

See the milestone plan in docs/. v1 is local-only; a self-hosted trade server (GTS-style with real filters) is designed for but lands in v2.

• .NET 10 SDK
• Node.js 20+

dotnet build
dotnet run --project src/OpenHome.Server

Save files: supply your own dumps (Checkpoint/JKSM for 3DS/Switch, emulator .sav/.dsv, flashcart dumps). OpenHOME never touches a live console.

docker build -t openhome .
docker run -d -p 8080:8080 -v openhome-data:/data openhome

or docker compose up -d --build. The image serves the UI and API on port 8080 and keeps all state in the /data volume. See docs/self-hosting.md for first run, data layout, backup/restore, and sprites.

.github/workflows/ci.yml builds and tests backend and web on every push/PR to master. Maintainers: enable branch protection for master in repo Settings (require the build-and-test check) — it's a one-time manual step, see docs/self-hosting.md#ci-and-branch-protection-repo-maintainers.

GPL-3.0 — required by the PKHeX.Core dependency. See LICENSE.