Excellent in OpenCode, as one entry in its own config

Set up Excellent (excellent.so) in OpenCode for me. First run: curl -fsSL https://excellent.so/install.sh | sh
If its output has a line starting "OpenCode: linked" or "OpenCode: already-linked", skip to the last step.
Otherwise open ~/.config/opencode/opencode.json (create it as {} if it is missing) and add this under the top-level "mcp" object, creating that object if needed and keeping everything else in the file unchanged:
"excellent": {"type":"local","command":["/absolute/path/to/node","/absolute/path/to/@excellent-so/cli/dist/server.js"],"cwd":"/absolute/path/to/@excellent-so/cli/dist","environment":{},"enabled":true}
If the file nests servers under "mcp": {"servers": {...}}, put it there instead, with "disabled": false in place of "enabled": true.
Replace /absolute/path/to/node with the output of `node -p process.execPath`, and /absolute/path/to/@excellent-so/cli/dist with the output of `echo "$(npm root -g)/@excellent-so/cli/dist"`.
Last step: tell me to restart OpenCode, because it only sees the new server after a restart.

It runs the installer and looks for OpenCode: linked; if that line is missing it adds the entry by hand, then asks you to restart.