import { z } from "zod";
export declare const LogLevelEnum: z.ZodEnum<["debug", "info", "warn", "error"]>;
export type LogLevel = z.infer<typeof LogLevelEnum>;
export declare const LOG_LEVEL: LogLevel;
export declare const LLMProviderEnum: z.ZodEnum<["google", "openai", "anthropic"]>;
export type LLMProvider = z.infer<typeof LLMProviderEnum>;
export declare const ReviewTargetEnum: z.ZodEnum<["staged", "HEAD", "branch_diff"]>;
export type ReviewTarget = z.infer<typeof ReviewTargetEnum>;
export declare const CodeReviewToolParamsSchema: z.ZodObject<{
    target: z.ZodEnum<["staged", "HEAD", "branch_diff"]>;
    taskDescription: z.ZodString;
    llmProvider: z.ZodEnum<["google", "openai", "anthropic"]>;
    modelName: z.ZodString;
    reviewFocus: z.ZodOptional<z.ZodString>;
    projectContext: z.ZodOptional<z.ZodString>;
    diffBase: z.ZodOptional<z.ZodString>;
    maxTokens: z.ZodOptional<z.ZodNumber>;
}, "strip", z.ZodTypeAny, {
    target: "staged" | "HEAD" | "branch_diff";
    taskDescription: string;
    llmProvider: "google" | "openai" | "anthropic";
    modelName: string;
    reviewFocus?: string | undefined;
    projectContext?: string | undefined;
    diffBase?: string | undefined;
    maxTokens?: number | undefined;
}, {
    target: "staged" | "HEAD" | "branch_diff";
    taskDescription: string;
    llmProvider: "google" | "openai" | "anthropic";
    modelName: string;
    reviewFocus?: string | undefined;
    projectContext?: string | undefined;
    diffBase?: string | undefined;
    maxTokens?: number | undefined;
}>;
export type CodeReviewToolParams = z.infer<typeof CodeReviewToolParamsSchema>;
/**
 * Gets the appropriate API key for the specified LLM provider.
 * For Google, the primary key name is GOOGLE_API_KEY with GEMINI_API_KEY as fallback.
 *
 * @param provider - The LLM provider (google, openai, anthropic)
 * @returns The API key or undefined if not found
 */
export declare function getApiKey(provider: LLMProvider): string | undefined;
/**
 * Determines whether to log verbose debug information.
 * Set the LOG_LEVEL environment variable to 'debug' for verbose output.
 */
export declare function isDebugMode(): boolean;