/**
 * Invariant definitions for @cortiq/dsh-llm-router.
 *
 * These invariants assert the plugin's dependencies are present at runtime:
 * - The LLM seam (`llm`) must be loaded before us
 * - At least one underlying model adapter must be available
 */
export const inject = {
  required: ['llm'] as const,
};

export const invariant = (ctx: Record<string, unknown>) => {
  const llm = (ctx as any).get?.('llm');
  if (!llm) {
    throw new Error('[llm-cortiq-router] Missing dependency: llm seam not available');
  }
  if (typeof llm.registerAdapter !== 'function') {
    throw new Error('[llm-cortiq-router] LLM seam does not support registerAdapter');
  }
};