Method resolve_plugin

crates/opencode-plugin/src/subprocess/loader.rs:257–265

Resolve a plugin spec to a path that the host can `import()`. For npm packages, we return the bare package name (not a `file://` URL) because `import("file:///path/to/dir")` doesn't resolve `package.json` exports — only bare specifiers trigger full module resolution. The subprocess working directory is set to `npm_dir()` so the runtime finds the package in `node_modules/`.

(&self, spec: &str)

    /// The subprocess working directory is set to `npm_dir()` so the runtime
    /// finds the package in `node_modules/`.
    fn resolve_plugin(&self, spec: &str) -> Result<String, PluginLoaderError> {
        if spec.starts_with("file://") {
            return Ok(spec.to_string());
        }

        // npm package — return bare package name for proper module resolution
        let pkg_name = spec.split('@').next().unwrap_or(spec);
        Ok(pkg_name.to_string())
    }

    /// Install npm packages into the shared cache directory.
    async fn install_npm_packages(&self, specs: &[&str]) -> Result<(), PluginLoaderError> {