/**
 * Delegation Enforcer
 *
 * Middleware that ensures model parameter is always present in Task/Agent calls.
 * Automatically injects the default model from agent definitions when not specified.
 *
 * This solves the problem where Claude Code doesn't automatically apply models
 * from agent definitions - every Task call must explicitly pass the model parameter.
 */
import type { ModelType } from '../shared/types.js';
/**
 * Agent input structure from Claude Agent SDK
 */
export interface AgentInput {
    description: string;
    prompt: string;
    subagent_type: string;
    model?: 'sonnet' | 'opus' | 'haiku';
    resume?: string;
    run_in_background?: boolean;
}
/**
 * Result of model enforcement
 */
export interface EnforcementResult {
    /** Original input */
    originalInput: AgentInput;
    /** Modified input with model enforced */
    modifiedInput: AgentInput;
    /** Whether model was auto-injected */
    injected: boolean;
    /** The model that was used */
    model: ModelType;
    /** Warning message (only if SKC_DEBUG=true) */
    warning?: string;
}
/**
 * Enforce model parameter for an agent delegation call
 *
 * If model is explicitly specified, it's preserved.
 * If not, the default model from agent definition is injected.
 *
 * @param agentInput - The agent/task input parameters
 * @returns Enforcement result with modified input
 * @throws Error if agent type has no default model
 */
export declare function enforceModel(agentInput: AgentInput): EnforcementResult;
/**
 * Check if tool input is an agent delegation call
 */
export declare function isAgentCall(toolName: string, toolInput: unknown): toolInput is AgentInput;
/**
 * Process a pre-tool-use hook for model enforcement
 *
 * @param toolName - The tool being invoked
 * @param toolInput - The tool input parameters
 * @returns Modified tool input with model enforced, or original if not an agent call
 */
export declare function processPreToolUse(toolName: string, toolInput: unknown): {
    modifiedInput: unknown;
    warning?: string;
};
/**
 * Get model for an agent type (for testing/debugging)
 *
 * @param agentType - The agent type (with or without sk-claudecode: prefix)
 * @returns The default model for the agent
 * @throws Error if agent type not found or has no model
 */
export declare function getModelForAgent(agentType: string): ModelType;
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