In-console updates for Gen1Recomp on Nintendo Switch. This NRO is the hbmenu entry (gen1recomp.nro). It checks GitHub Releases quietly (no UI when you are already up to date or offline). Only if a newer release exists does it show a launcher-style screen (black + RGB rail + project logo + flat A/B buttons), download the same gen1recomp-*-switch.zip used for install, verify SHA-256 from sha256sums.txt, replace both gen1recomp-game.nro and gen1recomp.nro (matching NACP version for hbmenu/Sphaira), then load the game with envSetNextLoad.

The LÖVE self-updater (src/update/Check.lua) stays disabled on NX. Wire format (also in Lua): src/update/SwitchOta.lua. NACP icon: assets/switch/icon.jpg.

Layout on microSD

sdmc:/switch/gen1recomp/gen1recomp.nro        <- this launcher
sdmc:/switch/gen1recomp/gen1recomp-game.nro   <- fused LÖVE game
sdmc:/switch/gen1recomp/version.txt          <- installed X.Y.Z
sdmc:/switch/gen1recomp/pokemon-love2d/      <- saves (never touched by OTA)

Host tests (no DEVKITPRO)

cd native/switch-ota-launcher
make host-test

Switch build (DEVKITPRO)

Needs DEVKITPRO with packages roughly:

(dkp-)pacman -S --needed switch-curl switch-mbedtls switch-zlib switch-zziplib
# or: bash scripts/switch/install_devkitpro_deps.sh

export DEVKITPRO=/opt/devkitpro   # typical
cd native/switch-ota-launcher
make
# -> gen1recomp.nro

Or from repo root (as part of --fused):

scripts/build_switch.sh --fetch --fused --version X.Y.Z

Standalone launcher build:

scripts/switch/build_ota_launcher.sh

Docker fallback uses the same pin as fused builds (scripts/switch/dkp-docker.image).

Packaging

scripts/switch/pack_sd_zip.sh GAME_NRO VERSION OUT_ZIP LAUNCHER_NRO writes both NROs into the SD zip. That zip is also what OTA downloads. Manifest: scripts/switch/ota_launcher.manifest.

Status / known gaps

Zip extraction uses switch-zziplib (ota_unzip.c) on device.
OTA replaces launcher + game from the install zip (NACP versions stay aligned).
Sphaira HOME forwarders cache metadata until reinstalled (see docs/switch-install.md).
Release runner: switch-dev + (install_devkitpro_deps.sh or Docker)