import type { LLMProvider } from './types.js';
import type { KeyStoreOpts } from '../../../security/key-store.js';
/** Read a provider's API key from env, accepting the canonical var or an alias. */
export declare function providerKeyFromEnv(p: LLMProvider, env: Record<string, string | undefined>): string | undefined;
export declare function selectProvider(env: Record<string, string | undefined>): LLMProvider | null;
/**
 * Select a provider considering keystore (keychain/file) in addition to env.
 * Returns { provider, key } so the caller can use the key directly without
 * hydrating process.env. Returns null when no provider is configured.
 *
 * Resolution order:
 *   1. WIGOLO_LLM_PROVIDER env override (if key resolves in keystore or env)
 *   2. Persisted config.json `llmProvider` (if key resolves) — so a runtime
 *      with zero env vars honors the provider chosen during `wigolo init`.
 *   3. First provider in PROVIDER_ORDER whose key resolves (auto-detect,
 *      keychain → file → env via resolveProviderKey).
 */
export declare function selectProviderWithKeyStore(env: Record<string, string | undefined>, opts: KeyStoreOpts): Promise<{
    provider: LLMProvider;
    key: string;
} | null>;
export declare function providerEnvVar(p: LLMProvider): string;
export declare function allProviders(): readonly LLMProvider[];
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