/**
 * Cross-family critic diversity check.
 *
 * LLM-as-judge bias is materially reduced when the critics that score an
 * agent's output come from more than one model *family* (e.g. GPT + Claude):
 * different training pipelines carry different blind spots, so a disagreement
 * between families is a stronger quality signal than agreement within one.
 *
 * Darwin's `resolveCriticProviders` already spreads critics across families
 * WHEN the provider keys are present — but when only one provider is
 * configured, all three critics silently collapse onto a single family and the
 * diversity guarantee is gone with no signal to the operator. This module makes
 * that observable (warn by default) and enforceable (opt-in, env-gated).
 *
 * Important nuance: `claude-cli` and `anthropic-api` are the SAME family (both
 * Anthropic); they differ only in latency. Real family diversity needs a
 * non-Anthropic provider key (OpenAI, Ollama, …). The check therefore keys on
 * the model *family*, never on the provider label.
 */
/** Minimal shape needed from a resolved critic provider entry. */
export interface CriticFamilyInfo {
    /** Model family — e.g. 'anthropic', 'openai', 'ollama'. */
    family: string;
}
export interface CrossFamilyCheck {
    /** Distinct, non-empty families across all critics, sorted alphabetically. */
    families: string[];
    /** Number of distinct families. */
    count: number;
    /**
     * True when every critic shares a single family (judge bias unmitigated).
     * A degenerate empty critic map is also reported as single-family — it is
     * not a diversity win.
     */
    singleFamily: boolean;
}
/**
 * Count the distinct model families across a resolved critic-provider map.
 * Pure and deterministic. Blank / non-string families are ignored so a
 * mis-populated entry can never inflate the diversity count.
 */
export declare function checkCriticFamilies(providers: Record<string, CriticFamilyInfo>): CrossFamilyCheck;
/**
 * Whether cross-family critics are *required* (hard fail) rather than merely
 * recommended (warn). Gated by `DARWIN_REQUIRE_CROSS_FAMILY` so CI can enforce
 * it without changing the default developer experience.
 */
export declare function crossFamilyRequired(env?: NodeJS.ProcessEnv): boolean;
/** Operator-facing message when the critics collapse onto one family. */
export declare function singleFamilyHint(check: CrossFamilyCheck): string;
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