/**
 * Config key parser - handles dot-notation config keys and validates against schema
 */
/**
 * Type of a configuration value
 */
export type ConfigValueType = "string" | "integer" | "boolean" | "enum" | "string[]";
/**
 * Information about a configuration key
 */
export interface ConfigKeyInfo {
    /** The full key path in snake_case */
    key: string;
    /** The value type */
    type: ConfigValueType;
    /** Description of the key */
    description: string;
    /** For enum types, the allowed values */
    enumValues?: string[];
    /** Whether the value is optional (can be unset) */
    optional?: boolean;
}
/**
 * Parse a dot-notation config key into path segments.
 */
export declare function parseConfigKey(key: string): string[];
/**
 * Check if a key is a valid configuration key.
 * Only leaf keys (not sections) are valid.
 * Supports both static keys and dynamic patterns (e.g. fulltext.converters.*.command).
 */
export declare function isValidConfigKey(key: string): boolean;
/**
 * Get information about a configuration key.
 * Returns null if the key is not valid.
 * Supports both static keys and dynamic patterns (e.g. fulltext.converters.*.command).
 */
export declare function getConfigKeyInfo(key: string): ConfigKeyInfo | null;
/**
 * Get all valid configuration keys, optionally filtered by section.
 */
export declare function getAllConfigKeys(section?: string): string[];
/**
 * Convert a snake_case key to the internal camelCase path for accessing config values.
 * e.g., "cli.tui.debounce_ms" -> ["cli", "tui", "debounceMs"]
 */
export declare function toInternalPath(key: string): string[];
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