/**
 * TypeScript-compiler-API helper for tests that need to verify generated output actually
 * TYPECHECKS, not just that it contains the right substrings. Complements the in-memory
 * compileFiles helper in packages/openapi-zod-ts/src/__tests__/helpers.ts (not imported
 * directly: it lives in a sibling package's test-only sources, outside its public API, and
 * that helper never needed real node_modules resolution since openapi-zod-ts client output
 * has zero runtime deps).
 *
 * Unlike an in-memory virtual filesystem, this writes files to a REAL temp directory nested
 * inside this package (not os.tmpdir()) so that Node's module resolution, walking up from
 * the temp directory, finds this package's real node_modules (zod, hono, express, fastify,
 * fastify-type-provider-zod) and resolves their real .d.ts files.
 *
 * Import with the .js extension as required by NodeNext module resolution:
 *   import { compileGeneratedFiles } from './ts-compile-helpers.js'
 */
import ts from 'typescript';
/**
 * Write `files` (keyed by relative path, e.g. 'router.ts', '_shared/errors.ts') into a fresh
 * temp directory under this package, compile them with the real TypeScript compiler, and
 * return only the diagnostics that belong to those files (node_modules/lib.d.ts excluded).
 * Always cleans up the temp directory before returning, even on failure.
 */
export declare function compileGeneratedFiles(files: Record<string, string>): readonly ts.Diagnostic[];
/**
 * Assert that a TypeScript compilation produced no diagnostics. Throws a descriptive
 * error listing all messages when diagnostics are present.
 *
 * @param diagnostics - result from compileGeneratedFiles
 * @param context - short label for the error message, e.g. "hono router + service (#377)"
 */
export declare function assertNoTsDiagnostics(diagnostics: readonly ts.Diagnostic[], context: string): void;
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