/**
 * ModelRegistry interface and implementation for @a5c-ai/agent-mux.
 *
 * @see 06-capabilities-and-models.md §4
 */
import type { AgentName } from './types.js';
import type { ModelCapabilities, ModelValidationResult } from './capabilities.js';
import type { AdapterRegistry } from './adapter-registry.js';
export interface ModelCatalogEntry extends ModelCapabilities {
    /** Whether this entry is the adapter's default model. */
    isDefault: boolean;
}
/**
 * Per-agent model introspection registry.
 */
export interface ModelRegistry {
    /** Return all known models for an agent. */
    models(agent: AgentName): ModelCapabilities[];
    /** Return known models plus default-selection metadata for an agent. */
    catalog(agent: AgentName): ModelCatalogEntry[];
    /** Return capabilities for a specific model, or null if not found. */
    model(agent: AgentName, modelId: string): ModelCapabilities | null;
    /** Return the default model for an agent, or null. */
    defaultModel(agent: AgentName): ModelCapabilities | null;
    /** Validate a model identifier against the agent's known model list. */
    validate(agent: AgentName, modelId: string): ModelValidationResult;
    /** Estimate the cost (in USD) for given token usage on a specific model. */
    estimateCost(agent: AgentName, modelId: string, inputTokens: number, outputTokens: number): number;
    /** Refresh model data for a specific agent (no-op in current implementation). */
    refresh(agent: AgentName): Promise<void>;
    /** Refresh model data for all registered agents. */
    refreshAll(): Promise<void>;
    /** Return the timestamp of the last successful model data update. */
    lastUpdated(agent: AgentName): Date;
}
/**
 * Implementation of ModelRegistry backed by the AdapterRegistry.
 * Reads model data from adapter.models arrays.
 */
export declare class ModelRegistryImpl implements ModelRegistry {
    private readonly _adapters;
    private readonly _lastUpdated;
    private readonly _modelsCache;
    constructor(adapters: AdapterRegistry);
    models(agent: AgentName): ModelCapabilities[];
    catalog(agent: AgentName): ModelCatalogEntry[];
    model(agent: AgentName, modelId: string): ModelCapabilities | null;
    defaultModel(agent: AgentName): ModelCapabilities | null;
    validate(agent: AgentName, modelId: string): ModelValidationResult;
    estimateCost(agent: AgentName, modelId: string, inputTokens: number, outputTokens: number): number;
    refresh(_agent: AgentName): Promise<void>;
    refreshAll(): Promise<void>;
    lastUpdated(agent: AgentName): Date;
    /**
     * Simple fuzzy matching: find models whose IDs or aliases contain
     * parts of the query string. Returns up to 5 suggestions.
     */
    private _fuzzyMatch;
    private _getModels;
    private _normalizeModels;
}