import type { McpServerConfig } from '../../../core/models/workflow-provider-options.js';
export declare const MCP_HEADER_ENV_REFS: "__taktMcpHeaderEnvRefs";
export type McpHeaderPart = string | {
    readonly env: string;
};
export type McpHeaderEnvRefs = Record<string, McpHeaderPart[]>;
export declare function getMcpHeaderEnvRefs(server: McpServerConfig): McpHeaderEnvRefs;
export declare function interpolateMcpHeaders(headers: Record<string, string> | undefined, env: NodeJS.ProcessEnv): {
    headers: Record<string, string> | undefined;
    refs: McpHeaderEnvRefs;
};
export declare function attachMcpHeaderEnvRefs(server: McpServerConfig, refs: McpHeaderEnvRefs): McpServerConfig;
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