/**
 * REST handlers for prompt mutation settings.
 *
 * Routes:
 *   GET  /api/prompt-mutation-settings  → handleGetPromptMutationSettings
 *   PUT  /api/prompt-mutation-settings  → handlePutPromptMutationSettings
 *
 * Prompt mutation uses a micro-model to reorganize/deduplicate/resolve
 * conflicts in the assembled system prompt. This feature is opt-in
 * (disabled by default) and configurable via these endpoints.
 */
export interface PromptMutationSettingsResponse {
    enabled: boolean;
    provider?: string;
    modelId?: string;
}
export interface PutPromptMutationSettingsInput {
    enabled?: boolean;
    provider?: string | null;
    modelId?: string | null;
}
/**
 * Read the current prompt mutation settings from the persisted
 * SettingsManager (global + project config).
 */
export declare function handleGetPromptMutationSettings(cwd: string, agentDir?: string): Promise<PromptMutationSettingsResponse>;
/**
 * Update prompt mutation settings.
 *
 * Accepts a partial patch: missing keys are left unchanged. Setting
 * `provider` or `modelId` to null clears the field.
 */
export declare function handlePutPromptMutationSettings(cwd: string, patch: PutPromptMutationSettingsInput, agentDir?: string): Promise<PromptMutationSettingsResponse>;
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