/**
 * SPEC-004 tech-debt: Detect JS/TS runtime (node, bun, deno).
 * - Deno: deno.json / deno.jsonc (no node_modules, URL imports, targets Deno Deploy)
 * - Bun: bun.lockb or elysia (Bun-native HTTP framework) in deps
 * - Node: default when neither Deno nor Bun signals are present
 */
export declare function detectJsRuntime(projectPath: string): Promise<'node' | 'bun' | 'deno' | null>;
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