/**
 * Claude Fable and GPT Astra models are never assigned or routed.
 *
 * One decision function shared by every place that chooses, resolves, lists
 * or validates a model: org role models and tiers, `agent exec|test --model`,
 * `agent models`, MCP agent tools, subagent launches. There is deliberately no
 * override: a model that must not be routed is refused wherever it appears.
 *
 * `.claude/helpers/handlers/model-guard.cjs` carries the same two patterns for
 * the interactive PreToolUse hook, which runs outside this package; a test
 * keeps the two in step.
 */
export declare class ModelBlockedError extends Error {
    constructor(model: string, where?: string);
}
export declare function isBlockedModel(model: unknown): boolean;
/** Throws ModelBlockedError when `model` is blocked; `where` says what asked for it. */
export declare function assertModelAllowed(model: unknown, where?: string): void;
/** Drops listing entries whose id, alias, resolved model or label is blocked. */
export declare function withoutBlockedModels<T extends object>(list: readonly T[]): T[];
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