import type { ResolvedToolBudget, ToolBudgetConfig, ToolBudgetState } from "../../shared/types.ts";
export declare const DEFAULT_TOOL_BUDGET_BLOCK: readonly ["read", "grep", "find", "ls"];
export declare const TOOL_BUDGET_ENV = "PI_SUBAGENT_TOOL_BUDGET";
export declare const TOOL_BUDGET_ZERO_AUTH_ENV = "PI_SUBAGENT_TOOL_BUDGET_ZERO_AUTH";
export declare function normalizeToolBudgetBlock(block: ToolBudgetConfig["block"] | undefined): "*" | string[];
export declare function validateToolBudgetConfig(raw: unknown, label?: string, options?: {
    minimumHard?: 0 | 1;
}): {
    budget?: ResolvedToolBudget;
    error?: string;
};
export declare function initialToolBudgetState(budget: ResolvedToolBudget): ToolBudgetState;
export declare function toolBudgetState(budget: ResolvedToolBudget, toolCount: number, blockedTool?: string): ToolBudgetState;
export declare function shouldBlockToolForBudget(budget: ResolvedToolBudget, toolName: string, nextToolCount: number): boolean;
export declare function toolBudgetSoftNudge(budget: ResolvedToolBudget, toolCount: number): string;
export declare function toolBudgetBlockedMessage(budget: ResolvedToolBudget, toolName: string, toolCount: number): string;
export declare function encodeToolBudgetEnv(budget: ResolvedToolBudget | undefined): string | undefined;
export declare function decodeToolBudgetEnv(value: string | undefined, options?: {
    allowZero?: boolean;
}): ResolvedToolBudget | undefined;
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