/**
 * Adapter-specific error classes. Both subclass `Error` so consumers can
 * use `err instanceof DarwinNodeError` to distinguish adapter failures
 * from upstream `darwin-agents` or `@langchain/langgraph` errors.
 *
 * Pattern mirrors `mcp-armor` and `darwin-agents@0.4.9` McpBridge*Error
 * (see `nex_decide 34a506ba` for the upstream pattern).
 */
export declare class DarwinNodeError extends Error {
    readonly agentName: string;
    readonly name = "DarwinNodeError";
    constructor(message: string, agentName: string, options?: {
        cause?: unknown;
    });
}
export declare class DarwinEvolutionHookError extends Error {
    readonly name = "DarwinEvolutionHookError";
    constructor(message: string, options?: {
        cause?: unknown;
    });
}
/**
 * Thrown by `createTokenBudgetCallbacks` when a configured per-invocation
 * token budget is exceeded. The handler attaches the cumulative tokens
 * counted at the moment of the throw so consumers can log / alert.
 *
 * NEW V0.4 (S1235).
 */
export declare class DarwinTokenBudgetExceededError extends Error {
    readonly budget: number;
    readonly totalTokens: number;
    readonly providerHint: string | undefined;
    readonly name = "DarwinTokenBudgetExceededError";
    constructor(message: string, budget: number, totalTokens: number, providerHint: string | undefined, options?: {
        cause?: unknown;
    });
}
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