/**
 * Ruby detection — CONTENT-AWARE Gemfile / gemspec classification.
 *
 * Kill line: Gemfile alone ≠ Rails.
 * Bundler backs libraries, Rails apps, Sinatra/Roda/Grape/Hanami, CLIs, and MCP
 * servers. We read gem names (+ light layout), then branch.
 *
 * Same composition as go.ts / jvm.ts: knowledge in ruby-detection.json.
 */
export type RubyAppType = 'mcp' | 'backend' | 'cli' | 'library';
export interface RubyProject {
    appType: RubyAppType;
    /** Primary framework label (Rails / Sinatra / …) or ''. */
    framework: string;
    /** package manager signal */
    packageManager: 'bundler' | 'rubygems';
    /** Glass Hood rationale for .faf `# found:`. */
    found: string;
}
/** True if directory looks like a Ruby project root. */
export declare function isRubyRoot(dir: string): boolean;
/**
 * Extract gem names from a Gemfile / gems.rb (static — does NOT execute Ruby).
 * Handles: gem 'x', gem "x", gem :x (rare), gem "x", "1.0"
 */
export declare function parseGemfileGems(content: string): Set<string>;
/**
 * Extract gem names from Gemfile.lock SPECS sections (static).
 * Lines like "    rails (7.1.0)" under GEM specs.
 */
export declare function parseGemfileLockGems(content: string): Set<string>;
/** Gem names from *.gemspec dependency lines (static). */
export declare function parseGemspecGems(content: string): Set<string>;
/**
 * Classify a Ruby project from Gemfile / lock / gemspec (+ light layout).
 * Returns null if not a Ruby root.
 */
export declare function detectRubyProject(dir: string): RubyProject | null;