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The new row, Add to Steam (Windows), puts a non-Steam shortcut named "The Legend of Zelda Ocarina of Time" into the shortcuts.vdf of every Steam account that signed in on the PC (launcher/steam.py): the binary key-value file is read and written back as it was, with ours added or updated in place, and the file from before the first change kept beside it. Steam reads that file only at its start and writes it back when it closes, so a running Steam is asked to close (-shutdown) and started again after. The pictures come from the player's game when the row is selected (launcher/gameart.py), as the launcher's fonts and sounds do: Navi from the HUD's icon and its glow, the logo with the Master Sword and the Hylian Shield from the title screen's texture archive (decoded with runtime/tex_astc.c, built into a library with the toolchain's clang), and a frame 12 seconds into the first title movie, the field under the full moon, decoded from its AV1 with the toolchain's dav1d.exe, as the background, the cover and the wide tile. They go into config/grid named by the shortcut's id, CRC-32 of Exe and AppName with the top bit set, which matches the id Steam gave an existing shortcut on the test PC. Steam starts the launcher's pythonw.exe on data/steam_play.pyw, which runs the launcher of app/current.txt with the new --play: the game starts from its folder with its console hidden, as Play starts it, and the process waits for it and for the copies its own Restart starts, so Steam counts the game as running while it is. ocarina.exe is a console program, so starting it directly would open a console window beside the game, and NX2navi.exe ends six seconds after it started the launcher. Started that way on an RX 7900 XT PC, the game ran, the Python process stayed until the game was closed and ended with code 0. Tested against copies of that PC's Steam files; the real Steam library is not changed until the player selects the row. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>