import type { ITtscLoadedNativePlugin } from "../../structures/internal/ITtscLoadedNativePlugin";
/**
 * Resolve the caller-declared plugin config anchor to an absolute path, or
 * `undefined` when the caller did not declare one.
 *
 * The anchor exists for embedders that compile through a generated tsconfig
 * outside the project (the bundler adapters' alias overlay): they set
 * `pluginConfigDir` to the real project directory and every native plugin spawn
 * forwards it as `TTSC_PLUGIN_CONFIG_DIR`, so config-file discovery walks the
 * project instead of the wrapper's temp-dir ancestry. Callers that point at a
 * user-authored tsconfig (even a wrapper outside the project) leave it unset,
 * keeping discovery anchored at the tsconfig's own directory.
 */
export declare function resolvePluginConfigDir(options: {
    cwd?: string;
    pluginConfigDir?: string;
}): string | undefined;
/**
 * Reports whether the given transform source is linked into another compiler
 * host instead of owning the process itself.
 */
export declare function isLinkedTransform(plugin: ITtscLoadedNativePlugin): boolean;
/**
 * Verifies that all transform plugins in `plugins` either resolve to the same
 * native binary (the common case) after linked sources are removed from the
 * compiler-owner set.
 *
 * Two callers exist with subtly different error wording: the build path
 * (`runBuild.ts`) reports "multiple compiler native backends cannot share one
 * emit pass" while the source-to-source path (`transformProjectInMemory.ts`)
 * reports "cannot share one source-to-source pass". The `pass` argument selects
 * the appropriate phrase so the error message remains diagnostic-grade instead
 * of generic.
 */
export declare function assertSharedHostCompatibility(plugins: readonly ITtscLoadedNativePlugin[], pass: "emit" | "source-to-source"): void;
/**
 * Picks the native binary that must own the compiler pass. Linked transform
 * sources ride inside a host that uses driver.LoadProgram, so an executable
 * transform wins when one is present.
 */
export declare function selectSharedHostPlugin(plugins: readonly ITtscLoadedNativePlugin[]): ITtscLoadedNativePlugin;
/**
 * Return every plugin whose transform source is linked into another host binary
 * rather than owning the process. The host binary passes these via
 * `TTSC_LINKED_PLUGINS_JSON` so their Go code runs inside the same process.
 */
export declare function linkedTransformPlugins(plugins: readonly ITtscLoadedNativePlugin[]): ITtscLoadedNativePlugin[];