Keep GROK_PLUGIN_ROOT and Grok layout inside the adapter. Shared hooks
resolve only PLUGIN_ROOT/CLAUDE_PLUGIN_ROOT/ECC_PLUGIN_ROOT.
ECC trusted install is previewInstall/applyInstall via
scripts/grok-install.js and install.sh --target grok. Native Grok CLI
marketplace install is discovery only; empty mcpServers and hooks opt
the CLI path out of Chrome DevTools and hooks.
Install state uses ecc.install.v1 under ~/.grok/ecc/. Locales are left
on main for this behavioral patch.