thought i buit the plugins but i can only find "gain.vst3" and "gain.clap" about nih-plug HOT 2 OPEN

Are you looking for nih plugins? You can download them at here: https://github.com/robbert-vdh/nih-plug/actions/workflows/build.yml?query=branch:master

just find the Artifacts in build page, and download it.

if you want to build them, just cd to nih_plug/plugins/<the_plugin_u_want_to_build>, run cargo xtask bundle <PLUGIN_NAME> --release. Then you can find vst3 and clap plugins in target folder.

from nih-plug.

Yes, building any plug-in in this repository only builds it in the target folder.

For your DAW to pick them up, you'd need to copy gain.vst3 (or whichever plug-in or format you want) to the correct folder which your DAW looks in. For my set-up (macOS + Bitwig Studio), the target parent folder to copy to would be /Library/Audio/Plug-ins/VST3.

You can even combine everything in a single command if you wish (assuming you're in the plug-in folder itself, as @sout233 mentioned, and you're on the same set-up as me):

# Bundle for release
cargo xtask bundle gain --release && \

# Copy to the default VST3 plug-ins folder
sudo rm -rf /Library/Audio/Plug-ins/VST3/gain.vst3 && \
sudo cp -r target/bundled/gain.vst3 /Library/Audio/Plug-ins/VST3

from nih-plug.