/**
 * Rewrites nested companion model-source fields whose value is a known SDK
 * constant name into the full `ModelConstant` object (same treatment as
 * top-level `serve.models[*].model` / `.src`).
 *
 * Matches keys ending in `ModelSrc` (e.g. `s3genModelSrc`, `llmModelSrc`,
 * `vaeModelSrc`) and the ESRGAN `upscaler.model_src` snake_case field.
 * Recurses into plain nested objects so whisper/nmt nested configs are covered.
 *
 * Bare identifiers are looked up as constants; values with `/` or a leading
 * `.` are left as filesystem / registry paths. Unknown CONSTANT_CASE names
 * throw with the accepted forms listed.
 */
export declare function resolveNestedModelSrcConstants(config: Record<string, unknown>, context?: string): Record<string, unknown>;
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